HP StorageWorks NAS 8000 Dedicated Server 36.4 GB Network Storage Server
Contents
1. 0 000 e cece esee 28 Accept the Default Settings kc ccc e 28 Assign a LUN to a storage array cette tenes 29 Take a path off line or put it back on line liliis esses 29 Change path behavior from alternate to preferred or vice versa 29 Add Hardware 0 ccc een enn nen eben eee ra 30 Remove Hardware aise aha de doe EEE Roo Wa ah goa DEA Rt RN dete bee hoe acs etn 30 Optimize Path Performance 0 ccc ne nett eens 31 Troubleshoot Failed Paths na caie auria a e ia e e AE e 31 Restore to Default Settings 0 nuanean 33 Recover from a Disaster 0 2 0 ect iaa a EN 33 A Text API Commands for NAS Data Path Manager e cece e eee eee 35 co lof MM 37 LI ENTER TITRE TT T TT QOL EEE ST 39 4 hp StorageWorks NAS Data Path Manager Installation and User s Guide about this guide This installation and user s guide provides information to help you m Install NAS Data Path Manager software on your HP StorageWorks NAS 8000 system Understand data path management concepts Monitor and manage data paths on your NAS 8000 Reinstall and reconfigure NAS Data Path Manager after system Disaster Recovery Intended Audience This guide is written for system administrators technicians and HP on site service representatives who are experienced with HP StorageWorks NAS 8000 systems Related Documentation In addition to th2. Data Path Manager Installation ad User s Guide glossary This glossary defines terms used in this guide or related to this product and is not a comprehensive glossary of computer terms Active state A state in which a path is currently designated as a preferred or alternate path for data path management Alternate path A path that is used for LUN access only after all preferred paths to the device have failed Alternate paths are assigned by the software and are considered by the software to be non optimal paths You may also designate preferred paths as alternate paths Automatic failback Following the failover of a LUN path from a failed path to another path the LUN automatically returns to its original path when the path is restored Controller The hardware device that facilitates communication between a host and one or more specified LUNs Controller failover For EVAs and EMAs in multibus controller failover mode when you have more than one controller failover between the two controllers requires host intervention it does not happen automatically Critical state The condition of a system where there are no more available physical paths the system is currently using the last available path for communication Keep in mind that individual path failure warning is only reported when all paths have failed for an activated volume group critical Failed state A state that indicates that all redundant components have
3. HDD1 Miner k Mirror COMI FCHBA FC HBA FCHBA FC HBA COMI 2Gb sec 2Gb sec Fibre Channel Switch Fibre Channel Switch a a DISK PORT DISK um 4 DISK PORT pa Bd Disk PORT Disk PORT DISK PORT H H DID PORT DISK PORT DISK PORT IBMdpskposr BOD 2 4 6 ag CECI J80D 2 4 6 Disk PORT Figure 2 Sample configuration using NAS Data Path Manager on a NAS 8000 high availability system 16 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Monitor Data Paths Check path configuration and performance using several methods m Use Performance Monitor to Monitor HBAs m View Volume Groups for Path Information These topics are discussed in detail below Use Performance Monitor to Monitor HBAs Use HP NAS 8000 Performance Monitor to m View and Change Performance Monitor Settings m Observe Data Path Performance Note Performance Monitor can show HBA NFS and CPU performance depending on what you enable Information presented here is for HBA monitoring only NFS and CPU performance monitoring are discussed in the HP NAS 8000 User s Guide View and Change Performance Monitor Settings Performance Monitor defaults to the disabled state Metrics are not received and no performance history is recorded You can enable Performance Monitor to receive data every 5 seconds for a particular HBA and choose whether to maintain the performance history for an enabled HBA To access
4. Restore the paths you set to off line according to the section on page 29 Note ace the default configuration and monitor performance before making any changes to the path settings 30 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Optimize Path Performance To improve network traffic across the paths the most effective changes are to either change preferred paths to alternate or change alternate paths to preferred 1 For each LUN involved select it then make changes as described at Learn to Perform Basic Data Path Manager Tasks on page 28 Monitor Data Paths as shown on page 17 to see the impact of the change Continue using this method until you achieve optimal system performance Troubleshoot Failed Paths NAS Data Path Manager indicates a failure in several ways m You receive an alert in the Event Summary From the Status tab select Event Summary under System Status Select the event then open the Event Details Window by one of the following methods to view details of the appropriate alert Click on the Event Details icon next to Actions Right click on the event listed under Status then select Event Details Select Actions gt Event Details The failure is recorded in the System Log From the Support tab select System Log under Diagnostics and Tools View the appropriate log entry If Performance Monitor is enabled the display for a fa
5. between an HBA and a specific LUN evaluated by Data Path Manager and determined to more efficient than others By default Data Path Manager will assign optimal paths as preferred paths used for path load balancing between the HBA and LUN Off line The state of a path that has been removed from service by failure or by being taken off line manually If a path is taken off line it reverts to its previous mode when it is brought back on line Preferred path Preferred paths are those data paths between an HBA and a specific LUN evaluated by Data Path Manager and determined to be optimal paths Preferred paths are used for path load balancing between the HBA and LUN WWN The World Wide Name of a device A WWN is a unique alpha numeric identifier for hardware When Data Path Manager is enabled each initiator HBA and target controller is identified by a world wide name WWN in the Volume Groups table 38 hp StorageWorks NAS Data Path Manager Installation and User s Guide A allocate space 26 alternate 9 14 23 29 30 31 33 arrays 9 12 29 30 assign a LUN 29 audience 5 authorized reseller HP 7 automatic 13 C change 29 CIFS 28 CIFS connection 25 command line interface 15 33 configuration drawing 15 connection CIFS 25 NFS 25 conventions document create volume group 24 customize 28 customize paths 28 D data paths 12 13 17 30 failover 9 14 manage 27 default 17 30 33 settings 28 delete
6. line The path then returns to it s previous mode and state Alternate path Alternate You must repair the failed path fails Automatic Failback will then restore the path so it can be used for failover Alternate path Alternate You have taken the path off line so is set to Off line the path does not necessarily need off line by the repair To restore the path you must user put it back on line The path then returns to it s previous mode and state Preferred Alternate Active Repair or restore the preferred path s have path s so normal operations will not failed over to an alternate path be interrupted if the alternate path fails The state of alternate paths is not shown in this table unless that path is currently being used You can find the current state of any path by selecting the path then selecting Actions gt Test Selected Path The test will take up to two minutes then a dialog box will report the status of the path hp StorageWorks NAS Data Path Manager Installation and User s Guide 23 NAS Data Path Manager Create a New Volume Group To create a new volume group 1 2 3 In Command View NAS click the Storage tab Navigate to Volume Groups Select Actions Create New Volume Group to bring up the Create New Volume Group dialog box Enter a name for your new volume group in the Volume Group Name field Select an appropriate LUN from the Available LU
7. server insert the CD into the server s CD ROM drive 2 Onacomputer on the network access the command line interface a Onan MS Windows system Select Start gt Run This step is not necessary for UNIX Linux systems b Execute telnet nas 8000 hostname or IP address c Login as admin and use a password if prompted 3 Execute the following commands installSystemPackage cdrom hpNasOs DataPathManager 1 0 0 i386 rpm installSystemPackage cdrom hpNasOs DataPathManager authorize 1 0 0 1386 rpm 4 Remove the CD from the CD ROM drive The software is installed but not yet enabled Enable and Disable the Software Enable and disable NAS Data Path Manager from Command View NAS 1 If you had a browser open close and re open it so that it finds the DPM software Select the Applications tab Select NAS Data Path Manager hp StorageWorks NAS Data Path Manager Installation and User s Guide 15 NAS Data Path Manager 4 Select Actions gt Enable Disable Application 5 Click OK The sample configuration below shows a multi server multi array system using NAS Data Path Manager Recommended connections from the fibre channel switches to the arrays are represented by solid lines optional connections are represented by dashed lines Primary LAN heartbeat data ra Quorum E Server GigE NIC Ov Oech GigE NIC HDDO i i HDDO Root OS Root OS HDD1 NAS Server NAS Server
8. view second icon to the right of Actions Select either the LUN or the path you wish to change Select Actions gt Edit Paths for Selected LUN to bring up the Edit LUN Path Configuration dialog box hp StorageWorks NAS Data Path Manager Installation and User s Guide 29 NAS Data Path Manager 4 Click the Mode box of the path you wish to change 5 Select the desired mode for the path alternate or preferred from the available options that appear then click OK Add Hardware After adding arrays or LUNs to your system you can configure the paths to them The recommended progression is as follows 1 Accept the Default Settings 2 Remove Hardware as described at on page 30 3 Manage the Data Paths if appropriate Continue making changes to your paths and monitoring performance until you achieve improved performance Remove Hardware When you add maintain remove or exchange hardware such as switches or cables you often know your paths will change NAS Data Path Manager allows you to plan the interruption of the normal flow of operations in order to make the hardware change 1 From the Storage tab select Volume Groups and use the tree view second icon to the right of Actions to view path information You can go to either the table view or tree view from the actions menu as well Complete the hardware change Scan for new hardware as discussed in the Accept the Default Settings section on page 29 4
9. volume group 25 device limits 31 disable 14 15 disaster recovery 33 disrupt 25 28 document conventions 6 prerequisites 5 related documentation 5 edit volume group 24 enable 15 17 error I O 25 event 13 F factory settings 26 failed 25 failover packages 9 restart 25 failure data path 13 14 repair 13 fibre channel 10 G getting help 6 H hardware add 30 change 30 hp StorageWorks NAS Data Path Manager Installation and User s Guide 39 Index failure 31 new 30 remove 30 scan for 30 help obtaining 6 HP authorized reseller 7 storage website 7 technical support 6 initiator 12 install 9 10 15 L limit devices 31 load balancing 9 13 log 31 login 15 LUN allocate 24 assign 29 edit paths 29 path 29 reset 26 traffic 27 M manage 27 28 mode 29 modes 17 N NFS 28 NFS connection 25 node 21 26 non optimal 9 30 O off line 23 29 on line 23 29 40 optimal 9 30 31 optimize 31 P password 15 path behavior 29 customize 28 edit 29 information 21 26 initiator 21 26 mode 23 repair 25 state 21 23 26 target 21 26 test 25 performance 30 31 policy 13 preferred 9 23 29 prerequisites 5 R recover from a disaster 33 refresh 26 related documentation 5 repair 13 repair path 25 repair volume group 31 requirements system 10 reset LUN paths 26 restore paths 14 restore to default 33 S scan for new storage 28 settings default 26 28 fa
10. If the test of the path shows successful you should attempt to repair the volume group Inan stand alone dedicated NAS server and storage configuration go to the Storage tab select Volume Groups then the volume group with the path that shows as failed From the Actions menu select Repair Volume Group Inan HA environment from the Storage tab select the volume group with the path that shows as failed Select Actions gt Restart Failover Package for Selected Volume Group There are several actions you can take if a path fails Check your hardware to be sure the connection itself did not loosen or fail If you have any unused alternate paths change them to preferred paths using the steps described under Change Path Behavior on page 29 Remove paths to disk devices if you are unable to use the NAS server There are limits for the number of paths you can have for each NAS server You may have up to 256 total SCSI and SCSI fibre channel paths per NAS server A maximum of 32 paths can be used for tape drives up to 128 can be assigned as disk paths to direct access LUNs and any number of paths can be used for changers taking into account the 256 total SCSI path maximum WARNING You can have a total of 128 devices a device is a combination of LUNs and paths If you exceed the maximum 128 devices for the NAS Server you will not be able to use the NAS Server until you remove not just take off line as many paths to disk
11. NS list and click OK to move the name to the Allocated LUNS list Continue to select and move LUNs as appropriate Click OK to create the volume group and return to the Volume Groups table view Edit Selected Volume Group To edit an existing volume group 1 2 In Command View NAS select the Storage tab Select Volume Groups then the View Volume Groups icon first icon to the right of Actions to use the table view Select the volume group you want to rename by clicking the row Select Actions gt Edit Selected Volume Group to bring up the Edit Volume Group dialog box m To change the volume group name type in the corrected name in the Volume Group Name field m To adda LUN select it from the Available LUNs field click the Add button The LUN will move to the Allocated LUNs field To change your mind about adding a LUN select it from the Allocated LUNs field click the Remove button The LUN will move back to the Available LUNs field Note The Remove button will be inactive if there is A one array per volume group t Also you can not remove LUNs that are already part o he volume group 5 24 Click OK to save changes and exit the dialog box hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Delete Selected Volume Group To delete a volume group 1 In Command View NAS select the Storage tab then select Volume Groups Use either the Table
12. Please contact your HP Service Representative for firmware information or updates Failover packages appear only on NAS 8000 systems with high availability HA Using failover packages your system can transfer control of data per failover package to a different NAS 8000 server if one server fails For more information on failover packages please see the NAS 8000 User s Guide Graphical User Interface Once NAS Data Path Manager is installed on a NAS 8000 server additional items will appear in Command View NAS the NAS 8000 graphical user interface This allows the administrator to view and manage NAS Data Path Manager functionality on the NAS 8000 using the same interface used to perform all other storage management tasks System Requirements NAS Data Path Manager has the following system requirements HP StorageWorks NAS 8000 system hpNasOs version 1 6 0 or later Fibre channel storage devices Host bus adapters HBAs connected to your fibre channel storage devices HBA firmware v3 90a7 or later VA710x VA740x VA741x XP EMA and or EVA storage arrays hp StorageWorks NAS Data Path Manager Installation and User s Guide Product Components NAS Data Path Manager The NAS Data Path Manager product includes m HP NAS Data Path Manager Installation and User s Guide m NAS Data Path Manager Software CD m Software License Agreement Note This guide is also on the NAS 8000 Documentation CD in PDF format Guide Overv
13. a Path Manager To scan for new hardware from Command View NAS l 2 3 Select the Storage tab Select Storage Array Summary Select Action gt Scan for New Storage Assign a LUN to a storage array 1 2 6 From the Storage tab select Storage Array Summary Select the storage array to which you would like to add a LUN or select a LUN within that array Select Actions gt Create New LUN This will launch the Create New LUN dialog box The first field provides the LUN number and defaults to the next available number You can change it by selecting the correct number from the pull down menu The second field provides the LUN Size GB and defaults to 100 0 GB The information below the second field shows the available capacity for the LUN To change the LUN size enter the size you want into the field Click OK to save that information and return to the Storage Array Summary Take a path off line or put it back on line 1 5 From the Storage tab select Volume Groups and click the tree view ED icon Select either the LUN or the path you wish to change Select Actions gt Edit Paths for Selected LUN to bring up the Edit LUN Path Configuration dialog box Click the Mode box of the path you wish to change Select the appropriate mode off line or not then click OK Change path behavior from alternate to preferred or vice versa 1 From the Storage tab select Volume Groups and use the tree
14. and enable Performance Monitor 1 From Command View NAS menu bar select Tools gt Performance Monitor This opens a new window 2 Select HBAs not a specific HBA from the tree in the left panel Figure 3 shows the Performance Monitor window and a sample tree hp StorageWorks NAS Data Path Manager Installation and User s Guide 17 NAS Data Path Manager HP NAS8000 Performance Monitor Filey View Window Help c 10 00 00 00 9 28 d5 28 10 00 00 00 c9 2b b1 d0 cm CPUs ie cpu NFS NFS NFS Total NFS Activity Figure 3 Performance Monitor window 1 Performance Monitor HP NAS8000 Performance Monitor Menu Bar 1 Fie View Window Help 2 Metric Actions Toolbar 2 gt le 5 3 Enable Disable p Monitor A A A 4 Open Char for 3 4 5 Selected ltem 5 Clear Monitor History on Server Figure 4 Performance Monitor Window Menu Metric Actions Toolbar and Icons 3 Click the Enable Disable Monitor icon on the Metric Actions Toolbar to display the Configure Metrics window 4 Inthe Enable Monitoring box Check the box to enable monitoring b To Enable Historical Data check that box as well This option is not available unless monitoring is enabled c Click OK to put these settings into effect 18 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager You can also access the Performance Monitor Settings dialog box to change th
15. ar Use the scroll bar at the bottom of the chart to see all of the data for the selected time period The View Historical chart icon is on the Chart Toolbar You can also switch to this mode from the Performance Monitor Menu Bar by selecting View Historical Chart lt gt HBA Performance MB sec for HBA2 a E Hon n 24 Hours Eel ca B f f 2 1 1 Historical Chart icon 2 Time interval selection Slider Figure 6 Historical Chart Toolbar For instructions on printing charts exporting chart data or getting help on reading charts see Performance Monitoring in the HP NAS 8000 User s Guide hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager View Volume Groups for Path Information The View Volume Groups window allows you to manage the relationship between system LUNs and volume groups to improve performance You can View Volume Group Information in Tree View Create a New Volume Group Edit Selected Volume Group Delete Selected Volume Group Test Selected Path Repair Volume Group Reset LUN Paths to Factory Settings Refresh the View View Volume Group Information in Table View View Volume Group Information in Tree View Detailed path information is available in the tree view From the Storage tab select Volume Groups then the tree view second icon to the right of Actions The tree view shows the following information for each volume group The list of volume group
16. bject to change without notice The warranties for Hewlett Packard Company products are set forth in the express limited warranty statements for such products Nothing herein should be construed as constituting an additional warranty Printed in the U S A hp StorageWorks NAS Data Path Manager Installation and User s Guide Edition March 2003 Part Number A7423 96001 contents About this Guide o 42559663400 4ok oo Sees se ee KG E MERI S AX CP ER 5 Intended Audience o ese re ex EUR ae EUR er IRR AUR 5 Related Documentation slssseseleeeeeee ee 5 Document Conventions sssseseeeeee eee 6 Getting Help ciega aot RUP ERUPRRUC I ROG RUE RUE RI OR RU RE A t 6 HP Technical Support osse eese eee RR RR AUR Yu HER ee Rees 6 HP Storage Website 0 eee i HP A thorized Reseller sete decens e ace ER ADR caer de vods UE s 7 1 NAS Data Path Manager vov o s rA RERVEEACRSTFEERREREEA mU EUR REEEE 9 Product Overview lseseeeeeeseeee em has 9 Graphical User Interface 0 0 e 10 System Requirements 22s zone reper eR EEE ERE SEP OPE pee NES ES 10 Product Components lllssseseeseeeee eer 11 Guide OVetvIew oet estre Res He oe e nile ddd pe Me eI Rd RR Ie es 11 Data Path Concepts i vl VEM RNME Sere E Rex ee en A EET ERR EET 12 Data Path Load Balancing 0 0 n ene 13 Data Path Failover 4 iue Des Ee Goes ee de Baad eR E e GUpade e shes 14 Automatic Fallback ose lesclE Rr doe RR
17. ble for file volume s snapshot s GB hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager The volume groups are listed alphabetically by volume group name In this view you can create edit and delete volume groups reset the LUN paths to factory settings and refresh the view File Tools Help Ready hp nas 8000 SIMULATION_MODE System Storage Storage Array Summary Vo ume G rou ps SE actions O O G amp 2 YU ETI E G File Volumes Volume Group poesy Available for amp File Volumes Summary Volume File Volume s Be Shares Exports and Snapshots GF Quotas a T GB GB E S Snapshots Snapshot Summary i e Snapshot Scheduler Figure 8 Viewing volume groups Decide Whether to Manage the Data Paths If each of your HBAs is using less than half of its capacity or if your HBAs bear about the same amount of traffic it is best to continue using the default settings However in some situations you could improve performance by changing the path settings For example there may be a high level of traffic on a particular LUN because it contains a database From the Performance Monitor you can see that a particular HBA has a high volume of traffic Manage paths to make sure that this LUN has all optimal paths configured hp StorageWorks NAS Data Path Manager Installation and User s Guide 27 NAS Data Path Manager Manage the Data Paths NAS Data Path Manager ne
18. ctive 33 Snapshot Scheduler E Preferred Alternate Alternate Active Preferred Active Preferred Alternate Alternate Active LUN42 E f85 vg test Inactive Figure 7 View volume group information in tree view Note Each initiator HBA and target controller is identified by its world wide name WWN in the Volume Groups table A WWN is a unique alpha numeric identifier for hardware 22 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager The relationship between the path modes and states provides you with important status information in a simplified way Some of this information is self explanatory other mode state combinations require explanation The following table explains these relationships Table 2 Path Modes and States Explained Situation Mode State Action All paths are Preferred Active Information is distributed load is in good Alternate balanced among the active preferred condition paths alternate paths are available but not being used Preferred path Preferred Failed You should repair the path as soon as fails Off line possible When it is repaired it will be used for the load balancing algorithm Preferred path Preferred Failed You have taken the path off line so is set to Off line the path does not necessarily need off line by the repair To restore the path you must user put it back on
19. ctory 26 snapshots 26 state 21 25 26 status 17 hp StorageWorks NAS Data Path Manager Installation and User s Guide storage 9 10 30 system requirements 10 system status 31 T target 12 technical support HP 6 Test Selected Path 23 25 31 traffic 27 troubleshooting 31 Index V volume group create new 24 delete 25 edit 24 information 21 26 Ww websites HP storage 7 world wide name 21 26 hp StorageWorks NAS Data Path Manager Installation and User s Guide 41 Index 42 hp StorageWorks NAS Data Path Manager Installation and User s Guide
20. customize your path settings as needed to obtain optimum performance from your storage system In addition Data Path Manager provides failover capability should all of the load balancing or optimal paths fail HP NAS Data Path Manager provides m Faster performance through dynamic load balancing over multiple paths from the HBAs to the Storage controllers m Automatic data path failover to an alternate path when a preferred path fails Using dynamic load balancing NAS Data Path Manager balances the flow of data through multiple paths to a specific storage location using a least used algorithm It detects multiple paths to each device identified by a logical unit number LUN and divides the data load among the designated preferred paths See Data Path Concepts on page 12 NAS Data Path Manager failover allows access to storage to continue uninterrupted in the event of a failure of all preferred paths by using available alternate paths hp StorageWorks NAS Data Path Manager Installation and User s Guide 9 NAS Data Path Manager Note Data Path Failover and failover packages are different NAS 8000 features Data Path Failover is the ability of your system to use alternate fibre channel paths to get information to your storage in case all of the preferred paths fail Data Path Failover can be installed and used on any NAS 8000 version 1 6 0 or later high availability HA or non HA system with the correct firmware revision
21. devices as necessary to equal no more than 128 devices hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Restore to Default Settings If you have customized your preferred and alternate paths but are not satisfied with the results you can reset your data path management settings to the default settings at the volume group level To reset volume group paths to default settings 1 From the Storage tab select Volume Groups and use the tree view second icon to the right of Actions Select the LUN to reset Select Actions Reset LUN Paths to Factory Settings This will bring up the Reset selected LUN Paths to factory settings dialog box 4 Readthe warning then accept it by checking the box next to the warning and selecting OK Recover from a Disaster Performing disaster recovery for the NAS 8000 removes HP NAS Data Path Manager from the system When disaster recovery is required perform the following tasks 1 Recover the NAS 8000 system using the instructions under Disaster Recovery in the hp StorageWorks NAS 8000 User s Guide 2 Install NAS Data Path Manager as discussed in the Install the Software section on page 15 of this guide 3 Re configure any customized path settings as described at Manage the Data Paths on page 28 hp StorageWorks NAS Data Path Manager Installation and User s Guide 33 NAS Data Path Manager 34 hp StorageWorks NAS Data Path Manager Ins
22. e hp StorageWorks NAS Data Path Manager Installation and User s Guide 25 NAS Data Path Manager To repair a volume group 1 From the Storage tab select Volume Groups 2 Select the tree view 3 Select the volume group to repair 4 Select Actions Ina dedicated attach configuration select Repair Volume Group Inan HA configuration select Restart Failover Package for Selected Volume Group 5 Check the warning box and click OK As part of the repair process CIFS and NFS connections may be disrupted For a dedicated system the volume groups are then activated For an HA system the package is stopped and then started again Reset LUN Paths to Factory Settings 1 From the Storage tab select Volume Groups 2 Select the volume group to reset 3 Select Actions gt Reset LUN Paths to Factory Settings This will bring up the Reset selected LUN Paths to factory settings dialog box 4 Read the warning and accept it by checking the box next to the warning and clicking OK Refresh the View To refresh the view select Actions gt Refresh View Volume Group Information in Table View 26 From the Storage tab select Volume Groups then the View Volume Groups icon first icon to the right of Actions to use the table view The table view shows the following information for each volume group Volume group name m Total capacity GB m Space allocated to file volume s and snapshot s GB m Space availa
23. e settings by either of the following methods m From Command View NAS select Configuration gt Alerts Logging gt Performance Monitor Settings then Actions gt Edit Performance Monitor Settings to view and change the monitoring settings m From Command View NAS select Configuration gt Configuration Wizard gt Actions gt Launch Wizard Then select Next to get the What do you want to configure dialog box Select only the Alert and Monitor Settings box then select Next until you get to the Performance Monitor Settings dialog box Make your enable disable selections here To clear the monitoring history of an HBA follow these steps 1 From Command View NAS select Tools gt Performance Monitor from the menu bar From the item tree select the HBA you wish to clear Select the Clear Monitor History on Server icon on the Metric Actions Toolbar Observe Data Path Performance Once the HBA metrics have been enabled you can use Performance Monitor to observe data path performance for the specified HBA s 1 Launch Performance Monitor by one of the following methods m From Command View NAS select Tools gt Performance Monitor from the menu bar This opens a new window m From the Configuration tab under Alerts Logging select Performance Monitor Settings gt Actions gt Open Performance Monitor This opens a new window m From the Status tab select Actions gt Performance Monitor 2 Select the HBA you wish to v
24. e eere Sees epe dde RE HR 14 Install NAS Data Path Manager 0 0 n 15 Prerequisttes o4 e deep eee ric do ne dac e ne E ape oi ee ub dubie s 15 Install the Software 2 0 0 cnet tence teens 15 Enable and Disable the Software 0 0 cee eens 15 Monitor Data Paths 41 2 erre aw rae bi UCET EE nee Mere E Rede E E RUE PA E S 17 Use Performance Monitor to Monitor HBAS lslslseeeeeees 17 View and Change Performance Monitor Settings 0 2 0 c eee eee 17 Observe Data Path Performance 0 cece ees 19 View Volume Groups for Path Information 0 2 0 0 c eee ees 21 View Volume Group Information in Tree View 0 00 eee eee eee ee 21 Create a New Volume Group 00 00 c cece tte e eee eas 24 hp StorageWorks NAS Data Path Manager Installation and User s Guide 3 Contents Edit Selected Volume Group 0 0 0 0c ccc cece eh 24 Delete Selected Volume Group 0 0 0 0 ccc cette nents 25 Test Selected Path sa nadia lia fee tale dnd lien dor SR gee abe ena wales 25 Repair Volume Group 1 nett eens 25 Reset LUN Paths to Factory Settings 0 00 cece ccc eee eens 26 Refresh the View sae see reU CPU ene adda ORI E 26 View Volume Group Information in Table View nussuuuua aanrennen 26 Decide Whether to Manage the Data Paths 2 0 cc cee eee eese 21 Manage the Data Paths lllseseseseeeee en 28 Learn to Perform Basic Data Path Manager Tasks
25. e faster access to the data on the specified LUN Without load balancing you are restricted to sending data over a single path even when it is more efficient to send data over multiple data paths Lengthy wait times can occur as all data requests queue up on the same path If one preferred data path fails NAS Data Path Manager drops the failed path out of the preferred path rotation and continues to transfer data through other preferred data paths without any loss of data The switch over is completely transparent to applications so normal operation continues without downtime All path events are logged in an Event Summary allowing the administrator to investigate and repair failed paths A path monitoring daemon checks the health and status of all paths every 10 minutes If a failed path has been repaired it will be used again according to the current load balancing policy Note HA Package failover does not occur unless all preferred and alternate paths on a single head fail hp StorageWorks NAS Data Path Manager Installation and User s Guide 13 NAS Data Path Manager Data Path Failover Data path failover occurs when all designated preferred paths fail between the NAS server and its storage device NAS Data Path Manager splits data transfers among good non failed preferred paths in a least used pattern as long as there are functioning preferred paths If all preferred paths fail NAS Data Path Manager directs the traf
26. eds very little attention to function properly However to customize your paths to better meet your network and data transfer requirements you will want or need to take action These actions include Add Hardware Remove Hardware Optimize Path Performance Troubleshoot Failed Paths Restore to Default Settings Recover from a Disaster WARNING These actions will temporarily disrupt all client connections to the volume group and its LUNs NFS UNIX client operations will be temporarily delayed CIFS Windows clients will be disconnected and will need to be reconnected To take any of the above actions you must know how to perform the basic Data Path Manager tasks Learn to Perform Basic Data Path Manager Tasks When customizing paths you will need to perform some basic tasks in NAS Data Path Manager m Accept the Default Settings m Assign a LUN to a storage array m Take a path off line or put it back on line m Change path behavior from alternate to preferred or vice versa Accept the Default Settings 28 When you scan for new storage NAS Data Path Manager detects the new hardware and discovers the associated paths The default configuration is assigned optimal paths are designated as preferred paths non optimal paths are designated as alternate paths Initially it is best to accept the default settings by not making any changes hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Dat
27. failed and the system is not operational If you have an HA system and have set up package failover associated packages have probably already failed over hp StorageWorks NAS Data Path Manager Installation and User s Guide 37 Glossary High Availability HA HA systems are designed to avoid a loss of service during both planned and unplanned downtime An HA system is based on clusters that have two NAS servers a Quorum server and storage that may come from either a dedicated storage configuration or a SAN The NAS servers share access to the storage and provide failover capabilities for each other but function as independent servers Host The server that acts as a file server running the NAS 8000 software Host bus adapter HBA A PCI or PCI X card used to connect to SCSI or SCSI fibre channel devices Load balancing An algorithm that distributes data transfer across all preferred paths The NAS 8000 uses a least used algorithm for optimizing performance Logical Unit Number LUN A physical or virtual storage device referred to as a logical unit A logical Unit Number LUN is a value that identifies a specific logical unit with a target ID number Non optimal path Those data paths between an HBA and a specific LUN evaluated by Data Path Manager and determined to be less efficient than others By default Data Path Manager will assign non optimal paths as alternate paths used for path failover Optimal path Those data paths
28. fic to a designated alternate path so that normal operations continue without interruption Without data path failover if all preferred paths fail there would be no communication between the server and the LUN and normal operations would cease until any path is restored Note For maximum data protection and uninterrupted service NAS Data Path Manager and High Availability configuration work together to provide the greatest protection and stability In an HA configuration where all preferred and alternate paths have failed the Failover Package will be moved to the second NAS server following the HA configuration settings that the administrator has set up To disable data path failover either disable the authorization to use the software see Enable and Disable the Software on page 15 Automatic Failback When a preferred path fails the path is not used until it is restored Automatic Failback restores the path to use after it is back in operation The operating system tests the failed path to see if it is restored before it can be used again Testing and restoring the path can take up to 10 minutes 14 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Install NAS Data Path Manager Prerequisites See System Requirements on page 10 Install the Software Use the NAS Data Path Manager software CD and the command line interface to install NAS Data Path Manager 1 On the NAS 8000
29. iew This guide contains the following sections Section Product Overview Information Introduction to the features of NAS Data Path Manager Data Path Concepts Key concepts for understanding the software uses and capabilities Install NAS Data Path Manager Information needed to install and enable NAS Data Path Manager Monitor Data Paths Tasks to perform to begin using NAS Data Path Manager Manage the Data Paths Tasks to customize data paths in different conditions to reset data paths to the default values and to recover from a disaster Text API Commands for NAS Data Text API commands you will need to install Path Manager enable disable and restore NAS Data Path Manager Glossary Definitions of important terms hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Data Path Concepts Data paths exist wherever there are physical connections from an initiator a NAS server HBA to a target an array controller Data Path Manager manages traffic patterns among all available paths between the NAS server HBAs and the LUNs in your arrays NAS 8000 Servers Figure 1 Preferred optimal and Alternate non optimal Paths Each path is comprised of the HBA controller and any necessary networking hardware NAS Data Path Manager evaluates the paths and determines which are considered optimal and which are non optimal This is determined by
30. iew from the tree in the left panel 3 Either double click the HBA name or select the Open Chart for Selected Item icon This icon is available by right clicking the HBA name and is also available on the Metric Actions Toolbar You can view data for several HBAs at a time by repeating this step for each HBA you wish to observe hp StorageWorks NAS Data Path Manager Installation and User s Guide 19 NAS Data Path Manager 20 Note Since Performance Monitor runs in a separate window you can keep it open while you are making changes to your data path settings in Command View NAS so you can view the impact of a change without exiting the path management session You can view each chart in two modes showing either real time or historical data View Real time chart is the default view This view shows the read rate and write rate MB sec of the specified HBA Measurements are taken every 5 seconds and appear on the chart as they are received The View Real time chart icon appears on the Chart Toolbar You can also switch to this mode from the Performance Monitor Menu Bar by selecting View gt Real time Chart lt gt HBA Performance MB sec for HBA2 a Ben I 1 1 Real time Chart icon Figure 5 Real time Chart Toolbar View Historical chart allows you to see the HBA read rate and write rate for the last 1 to 24 hours Select the number of hours to display by using the slider in the HBA Performance chart tool b
31. iled HBA or an HBA with failed paths shows that there is no traffic to the HBA From the Tools drop down menu select Performance Monitor A new window will open From the HP NAS 8000 Performance Monitor window select View gt HBA Performance then the name of the HBA you wish to monitor For preferred paths the Volume Groups summary shows the status for that path as failed From the Storage tab select Volume Groups View the summary as a tree by selecting the View Paths and LUNs for Volume Group icon the second icon to the right of Action hp StorageWorks NAS Data Path Manager Installation and User s Guide 31 NAS Data Path Manager 32 For alternate and preferred paths you can test a specific path from the Volume Groups summary page From the Storage tab select Volume Groups Click on the path you wish to test then either right click the path or select Actions Select Test Selected Path The test can take up to two minutes and will return the following results Ifthe path passes the test the Path test results box will appear and show a message stating The test of the selected path was successful Ifthe path fails the test the Error box will appear and specify what is wrong with the path After selecting OK the Path test results box will appear stating The test of the selected path failed For paths that show as failed which have been repaired you can test a specific path from the Volume Summary page
32. installation and user s guide hp StorageWorks NAS Data Path Manager installation and user s guide Edition March 2003 Part Number A7423 96001 Hewlett Packard Company 2003 Hewlett Packard Company makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Hewlett Packard The information contained in this document is subject to change without notice Compaq Computer Corporation is a wholly owned subsidiary of Hewlett Packard Company Java and all Java based marks are trademarks or registered trademarks of Sun Microsystems Inc Microsoft Windows and Windows NT are trademarks of Microsoft Corporation UNIX is a registered trademark of The Open Group All other product names mentioned herein may be trademarks of their respective companies Hewlett Packard Company shall not be liable for technical or editorial errors or omissions contained herein The information is provided as is without warranty of any kind and is su
33. is guide HP provides corresponding information m HP StorageWorks NAS 8000 on line help system m HP StorageWorks NAS 8000 1 6 0 Release Notes hp StorageWorks NAS Data Path Manager Installation and User s Guide About this Guide Document Conventions This document uses the following formatting conventions included in Table 1 Table 1 Document Conventions Element Convention Cross reference links Blue text Figure 1 Key and field names menu items Bold buttons and dialog box titles File names application names and text Italics emphasis User input command and directory Monospace font bis and system responses output COMMAND NAMES are uppercase and messages monospace font unless they are case sensitive Variables monospace italic font Website addresses Blue underlined sans serif font text http www hp com Getting Help If you still have a question after reading this guide contact an HP authorized service provider or access our website hilp www hp com support nas8000 HP Technical Support In North America call technical support at 1 800 652 6672 available 24 hours a day 7 days a week Note For continuous quality improvement calls may be recorded or monitored Outside North America call technical support at the nearest location Telephone numbers for worldwide technical support are listed on the HP website under support htto thenew hp com country u
34. looking at the overhead associated with transferring data from the NAS 8000 to a specific LUN on an associated storage device hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager As a general rule when a non optimal path is used the request is going from one HBA through a controller that communicates with the controller of the target LUN Therefore the data request goes through two controllers to get to the specific LUN instead of just one This is true for all except XP controllers for which all paths are considered optimal See paths to Controller 2 in Figure 1 on page 12 The overhead is the slight increase in time required for the first controller to talk to the second controller In reality the time that it takes is quite small for each data transfer however it becomes significant when you multiply the extra time by the number of transfers requested By default NAS Data Path Manager assigns optimal paths as preferred paths and non optimal paths as alternate paths For XP arrays and some VA arrays there are no non optimal paths In such a case no paths are assigned as failover paths by default so you must set them manually Note A path can be either preferred or alternate but not both Data Path Load Balancing Load balancing allows the greatest throughput of data from an HBA to a LUN by using all available preferred paths instead of just a single path This allows users to hav
35. or Tree view for this action Select the volume group to delete Select Actions gt Delete Selected Volume Group m Ifthe Volume Group contains data an error dialog box will appear explaining what action must be taken before you can delete the volume group Click OK to exit the dialog box m Ifthe volume group is empty the Confirm Volume Group Delete dialog box will appear Click OK to delete the volume group and exit the dialog box Test Selected Path At any time you can test a specific path to find out whether it is working or failed l 2 From the Storage tab select Volume Groups Click on the path you wish to test then either right click the path or select Actions Select Test Selected Path The test can take up to two minutes and will return the following results Ifthe path passes the test the Path test results box will appear and show a message stating The test of the selected path was successful Ifthe path fails the test the Error box will appear and specify what is wrong with the path After you click OK the Path test results box will appear stating The test of the selected path failed Repair Volume Group You must repair a volume group if You get an I O error the file system has shut down and all data transfers result in the same I O error The file system is no longer visible from the share or mount point A path has been repaired but still appears to be in a failed Stat
36. s packages HA systems only LUNs and paths The current state of packages volume groups and preferred paths LUNs do not have a state Package states HA systems only are Running Stopped Failed Over Unknown or Inactive If the package is being used by another node you will see Running on lt node name gt as the package state To edit any volume group LUN or path on that package you must stop the package and make the package local to your node Volume group states are Active or Inactive Preferred path states are Active Available Failed or Unknown Current mode of the paths Preferred Alternate Preferred Off line or Alternate Off line Path initiator s HBA s world wide name Path target s storage controller s world wide name hp StorageWorks NAS Data Path Manager Installation and User s Guide 21 NAS Data Path Manager In the tree view the volume groups are listed alphabetically by name unless you are on an HA system On an HA system the tree view displays package names first listed alphabetically then all volume groups that are not associated with a package File Tools Help Ready hp StorageVVorks NAS 8000 hpcm69ea Volume Groups me Groups ja ailover Packages eee m ue cra cie volumes LUNs Paths State Mode mmatr Target B File Volumes Summa Running Be Shares Exports Active m Quotas E73 Snapshots r1 ei Running EF Snapshot Summary A
37. s eng support html Be sure to have the following information available before calling m Technical support registration number if applicable m Product serial numbers NAS 8000 and arrays in question 6 hp StorageWorks NAS Data Path Manager Installation and User s Guide About this Guide Product model names and numbers Applicable error messages Operating system type and revision level from Command View NAS Identity page m Detailed specific questions HP Storage Website The HP website has the latest information on this product as well as the latest drivers Access storage at http thenew hp com country us eng prodserv storage html From this website select the appropriate product or solution HP Authorized Reseller For the name of your nearest HP authorized reseller m Inthe United States call 1 800 345 1518 m In Canada call 1 800 263 5868 m Elsewhere see the HP website for locations and telephone numbers htlp www hp com hp StorageWorks NAS Data Path Manager Installation and User s Guide 7 About this Guide 8 hp StorageWorks NAS Data Path Manager Installation and User s Guide NAS Data Path Manager Product Overview HP StorageWorks NAS Data Path Manager is an optional software product you can purchase for the HP StorageWorks NAS 8000 It provides automatic path load balancing and failover for NAS 8000 servers configured with multiple host bus adapters HBAs The software allows you to
38. tallation and User s Guide Text API Commands for NAS Data Path Manager The text API commands documented here allow you to install NAS Data Path Manager enable and disable the software package reactivate volume groups and restore data paths back to factory default settings To perform other DPM functions use the graphical user interface installSystemPackage cdrom hpNasOs DataPathManager 1 0 0 i386 rpm Installs Data Path Manager add on software module from the specified URL installSystemPackage cdrom hpNasOs DataPathManager authorize 1 0 0 i1386 rpm Authorizes Data Path Manager add on software getStorageDsdiScsiLunList Returns a list of LUNs that are being used in volume groups m outParam 0 N SCSI LUN name list resetStorageDasdScsiLunCustomizedPaths Restores the paths of the specified LUN back to factory default settings m inParam LUN name reactivateStorageVolumegroup On a dedicated attach system puts any volume group changes into effect m inParam 2 Volume group name stopClusterPackage On an HA system use with start ClusterPackage to put volume group changes into effect m inParam Cluster package name hp StorageWorks NAS Data Path Manager Installation ad User s Guide 35 Text API Commands for NAS Data Path Manager startClusterPackage On an HA system use after stopClusterPackage to put volume group changes into effect m inParam Cluster package name 36 hp StorageWorks NAS
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