HP StorageWorks P4000 User Manual
  1. Manuals
  2. Brands
  3. HP Manuals
  4. Storage
  5. StorageWorks P4000 Series
  6. User manual
HP StorageWorks P4000 User Manual

HP StorageWorks P4000 User Manual

Remote copy user guide
Hide thumbs Also See for StorageWorks P4000:
Table of Contents

Quick Links

See also: Technical White Paper, User Manual
HP StorageWorks
P4000 Remote Copy user guide
Abstract
This guide provides information about configuring and using asynchronous replication of storage volumes and
snapshots across geographic distances.
For the latest version of this guide, see the HP website http://www.hp.com/support/manuals.
Part Number: AX696-96032
Fourth edition: November 2010
Table of Contents
loading

Related Manuals for HP StorageWorks P4000

Summary of Contents for HP StorageWorks P4000

  • Page 1 HP StorageWorks P4000 Remote Copy user guide Abstract This guide provides information about configuring and using asynchronous replication of storage volumes and snapshots across geographic distances. For the latest version of this guide, see the HP website http://www.hp.com/support/manuals. Part Number: AX696-96032...
  • Page 2 Legal and notice information © Copyright 2009-2010 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S.

  • Page 3: Table Of Contents

    Monitoring details from the Remote Snapshots feature ............. 26 Viewing information in the Remote Snapshots tab ............. 26 Viewing the status in the Remote Snapshot Details window ..........26 Scheduling remote snapshots ..................... 29 Best practices for scheduling remote snapshots ................29 P4000 Remote Copy user guide...
  • Page 4 Creating the schedule ....................... 29 Creating the schedule for volume sets ................... 30 Timing for a scheduled remote snapshot ................31 What the system does ......................32 Pausing and resuming scheduled snapshots .................. 32 Pause a schedule ........................ 32 Resume a schedule ......................32 Editing the schedule to remote snapshot a volume .................
  • Page 5 New and changed information in this edition ................60 Related information ........................60 HP websites ........................60 Typographic conventions ......................60 Customer self repair ........................61 HP product documentation survey ....................62 Glossary .................... 63 Index ....................71 P4000 Remote Copy user guide...
  • Page 6 Figures Basic flow of Remote Copy ..................9 Icons depicting the primary snapshot copying to the remote snapshot ......10 Icons for Remote Copy in the Graphical Legend window ..........11 Remote copy in progress ..................19 Calculating a custom value for setting remote bandwidth ..........24 Viewing remote snapshot details ................
  • Page 7 Snapshot retention policy and maximum number of retained snapshots ......14 Scheduled Remote Copy planning checklist ..............15 Fields for Remote Snapshot Details window ..............27 Timeline of failover ....................36 Creating snapshots of data to synchronize ..............37 Document conventions ..................... 60 P4000 Remote Copy user guide...

  • Page 9: Understanding And Planning Remote Copy

    Create a remote volume at the remote location, and then create a remote copy of the primary snapshot to the remote volume. The system copies data from the primary snapshot to the remote snapshot. Figure 1 Basic flow of Remote Copy P4000 Remote Copy user guide...

  • Page 10: Graphical Representations Of Remote Copy

    Remote Copy can be used on the same site, even in the same management group and cluster. Graphical representations of Remote Copy The HP StorageWorks P4000 Centralized Management Console displays special graphical representations of Remote Copy. Copying the primary snapshot to the remote snapshot When the primary snapshot is copying to the remote snapshot, the CMC depicts the process with a moving graphic of pages from the primary to the remote snapshot.

  • Page 11: Remote Copy And Volume Replication

    You can move the copy of distribution the volume to the location where it is needed. Remote Copy creates copies of the original volume for use by other Volume clone application servers. P4000 Remote Copy user guide...

  • Page 12: Benefits Of Remote Copy

    Benefits of Remote Copy Remote Copy maintains the primary volume’s availability to application servers. Snapshots on the primary volume are taken instantaneously, and are then copied to remote snapshots in the off-site location. Remote Copy operates at the block level, moving large amounts of data much more quickly than file system copying.

  • Page 13: Logging In To Primary And Remote Management Groups

    To test the copy time: Create a remote snapshot of the primary volume. Wait for the copy to finish. Create another remote snapshot of the primary volume. P4000 Remote Copy user guide...

  • Page 14: Capacity

    Track the time required to complete the second remote snapshot. NOTE: This is the minimum amount of time that you should allow between scheduled copies. Check the remote bandwidth setting for the other management group by using the Edit Management Group command. This setting affects the time required to copy a remote snapshot. Capacity Does the cluster that contains the remote volume have sufficient space to accommodate scheduled snapshots?

  • Page 15: Best Practices

    Maximum number of snapshots (#) Retention Set period of time (minutes, hours, days, or weeks) Remote setup Management group The management group that contains the remote snapshot Volume The remote volume for the remote snapshots P4000 Remote Copy user guide...
  • Page 16 Configuration category Characteristic Select one of the following options: Maximum number of snapshots. This number equals completed snapshots only. In-progress snapshots take additional space on the cluster while copying. Retention Also, the system will not delete the last fully synchronized snapshot. For space calculations, figure n+2 where n=maximum number of snapshots.

  • Page 17: Using Remote Copy

    Although the interface allows you to create volumes and snapshots as you go, that may be a distraction at the time a crucial snapshot is needed. Getting there This procedure takes you to the New Remote Snapshot window where remote copy procedures start. P4000 Remote Copy user guide...

  • Page 18: Creating The Primary Snapshot

    This option requires the use of the VSS Provider. For more information, see the HP StorageWorks P4000 SAN Solution user guide or online help. If the VSS Provider is not installed, use SAN/iQ to create a point-in-time snapshot (not using VSS).

  • Page 19: Creating Primary Snapshots For Volume Sets

    Details tab, and then look at the Snapshot Set field. For information about the requirements for application-managed snapshots, see the HP StorageWorks P4000 SAN Solution user guide or online help. P4000 Remote Copy user guide...
  • Page 20 Select the Application-Managed Snapshot check box. This option requires the use of the VSS Provider. For information about the requirements for application-managed snapshots, see the HP StorageWorks P4000 SAN Solution user guide or online help. This option quiesces VSS-aware applications on the server before SAN/iQ creates the snapshot.

  • Page 21: Creating A Remote Volume

    Create a new remote volume during creation of a remote snapshot. Use the Management Groups, Clusters, and Volumes wizard in the “Getting Started” launch pad. See the HP StorageWorks P4000 SAN Solution user guide for details on working through the wizards.

  • Page 22: What The System Does

    Click New Remote Volume. The Management Groups, Clusters, and Volumes wizard opens. For specific help, see the “Getting Started” chapter in the HP StorageWorks P4000 SAN Solution user guide for details on working through the wizards. The wizard uses the information you entered to fill The New Remote Snapshot window when you exit the wizard.
  • Page 23 Remote Copy that goes from primary site A directly to remote site B which maintains that relationship going forward. For more information on PrimeSync, see the “Application Note: SAN/iQ Remote Copy PrimeSync — Creating Initial Copy” at http://www.hp.com/support/manuals. P4000 Remote Copy user guide...

  • Page 24: Viewing A List Of Remote Snapshots

    Viewing a list of remote snapshots View a list of remote snapshots associated with management groups, clusters, volumes, or snapshots. In the navigation window, select a cluster to view its list of remote snapshots. Click the Remote Snapshot. The report in the Remote Snapshot tab lists management groups and all the snapshots. The other columns show status information about the remote snapshots.

  • Page 25: Setting The Bandwidth

    Details tab, and then view the Snapshot Set field. For information about snapshot sets, see the HP StorageWorks P4000 SAN Solution user guide or online help. HP recommends that you keep or delete all snapshots for a volume set. If you need to roll back to a snapshot, you want to roll back each volume in the volume set to its corresponding snapshot.

  • Page 26: Monitoring Remote Snapshots

    Alarms window and in the Events category for the management group. You can also receive event notification through email and SNMP traps. For information about configuring event notification, see the HP StorageWorks P4000 SAN Solution user guide. Monitoring details from the Remote Snapshots feature You can view information about each remote snapshot in both the Remote Snapshots tab and in the Remote Snapshot Details window.

  • Page 27: Viewing Remote Snapshot Details

    Whether the snapshot was created manually or with a scheduled snapshot Snapshot Scanned (%) The percentage complete of the copy process. Values are 0 to 100%. The current state of the copy process. Valid values are Started, Copying, State Stalled, and Complete. Time P4000 Remote Copy user guide...

  • Page 28: Viewing Remote Snapshot Details For Remote Copy In Progress

    Statistic Fields Time Zone date and time copy started. The field format is MM/DD/YYYY Start Time HH:MM:SS [AM/PM] The number of days, hours, minutes, and seconds since the copy began Elapsed Time processing. The field format is Xd Xh Xm Xs X. N/A signifies completed copies or in-progress copies not yet calculated.

  • Page 29: Scheduling Remote Snapshots

    This option requires the use of the VSS Provider. For more information, see “Requirements for application-managed snapshots” in the HP StorageWorks P4000 SAN Solution user guide. If the VSS Provider is not installed, the SAN/iQ software allows the creation of a point-in-time snapshot.

  • Page 30: Creating The Schedule For Volume Sets

    Snapshot Set field. For information about the requirements for application-managed snapshots, see the HP StorageWorks P4000 SAN Solution user guide or online help. When you first create the schedule, the system stores information about the volume set as it exists at that time.

  • Page 31: Timing For A Scheduled Remote Snapshot

    This option requires the use of the VSS Provider. For more information, see “Requirements for application-managed snapshots” in the HP StorageWorks P4000 SAN Solution user guide. If the VSS Provider is not installed, SAN/iQ allows creation of a point-in-time snapshot (not using VSS).

  • Page 32: What The System Does

    What the system does If you created a new volume for the remote volume, the system creates a new primary snapshot of the primary volume and a remote snapshot of the remote volume. See “Best practices for scheduling remote snapshots” on page 29. If you selected an existing volume to become the remote volume, the system alerts you that it will create a snapshot to save existing data on the volume.

  • Page 33: Editing The Schedule To Remote Snapshot A Volume

    Click Close to return to the Edit Schedule to a Snapshot Volume window. The updated list of volumes is populated in the Volume Set field. For more information, see “Understanding schedules to snapshot volume sets” in the HP StorageWorks P4000 SAN Solution user guide.

  • Page 34: Planning Failover

    To see associated snapshots, select a snapshot, click the Details tab, and review the Snapshot Set field. For more information about volume sets and snapshot sets, see the HP StorageWorks P4000 SAN Solution user guide or online help. Using scripting for failover Application-based scripting provides the capability for creating, mounting, and deleting snapshots using scripts.

  • Page 35: Using Failover To Remote Volume

    This acting primary volume connects to application servers in order to maintain business continuance or accomplish disaster recovery. Click Finish. The final window of the wizard displays a summary of the actions and a reminder to reconnect your iSCSI sessions. P4000 Remote Copy user guide...

  • Page 36: Resuming Production After Failover

    If you promoted a remote application-managed snapshot, use diskpart.exe to change the resulting volume's attributes. For more information, see the HP StorageWorks P4000 SAN Solution user guide or online help. Resuming production after failover After failover occurs, three scenarios exist for resuming production: Failback returns operations to the original primary site it is restored.

  • Page 37: Synchronizing The Data Between The Acting Primary Volume And The Original Primary Volume

    Convert the remote volume into a primary volume. Make the acting primary volume into the remote volume. This creates a snapshot of that volume. Configure a new timetable for the scheduled remote snapshots on the new primary volume. P4000 Remote Copy user guide...

  • Page 38: Setting Up A New Production Site

    The system allows you to automatically roll back all associated volumes. To see any associated snapshots, select a snapshot, click the Details tab, and then look at the Snapshot Set field. For more information about volume sets and snapshot sets, see the HP StorageWorks P4000 SAN Solution user guide or online help.

  • Page 39: Rolling Back A Remote Volume

    The system gives you the option to automatically roll back all associated volumes. To see any associated snapshots, select a snapshot, click the Details tab, and look at the Snapshot Set field. For more information about volume sets and snapshot sets, see the HP StorageWorks P4000 SAN Solution user guide or online help.

  • Page 40: Using Remote Snapshots For Data Migration And Data Mining

    Using remote snapshots for data migration and data mining Use remote snapshots to create split mirrors for data mining and data migration. A split mirror is a one-time remote snapshot created from the volume containing the data you want to use or move. Split mirrors are usually created for one-time use and then discarded.
  • Page 41 Click OK. The Edit Management Group window is displayed on top again, and the remote management group you disassociated from is gone from the list. Click OK to return to the navigation window. P4000 Remote Copy user guide...
  • Page 42 Using Remote Copy...

  • Page 43: Sample Remote Copy Configurations

    Set up a schedule for copying remote snapshots to the backup location. If your application server uses multiple volumes that must be in sync, use a script or VSS to quiesce the application before creating remote snapshots. P4000 Remote Copy user guide...

  • Page 44: How This Configuration Works For High Availability

    Figure 10 High availability example configuration How this configuration works for high availability If the production application server or volumes become unavailable, application processing fails over to the backup application server. The remote volume and remote snapshots become acting primary, and the backup application server becomes the acting production application server, accessing data from the acting primary volume.
  • Page 45 For more information see “Synchronizing the data between the acting primary volume and the original primary volume” on page 37. P4000 Remote Copy user guide...

  • Page 46: Best Practices

    For more information about Network RAID and data protection levels, see the chapter “Provisioning Storage” in the HP StorageWorks P4000 SAN Solution user guide. Example configuration Figure 10 on page 44 uses three storage systems per cluster.

  • Page 47: Achieving Affordable Disaster Recovery

    To configure affordable disaster recovery, create remote snapshots of your volumes in an off-site location. In addition, you can create tape backups from the remote snapshots in the off-site location: Designate one or more off-site locations to be the destination for remote snapshots. P4000 Remote Copy user guide...

  • Page 48: How This Works For Affordable Disaster Recovery

    Set up a schedule for creating remote snapshots in the designated off-site locations. If your applic- ation server uses multiple volumes that must be in sync, use a script to quiesce the application before creating remote snapshots. Create routine tape backups of the remote snapshots in the off-site locations. Figure 14 on page 48 shows an example configuration for disaster recovery.

  • Page 49: Restoring From A Remote Volume

    49 note the volume labeled Primary Snapshot in the Production Site. It originated as a read only backup, but is brought into use as an acting primary. Figure 16 Restoring from tape backup P4000 Remote Copy user guide...

  • Page 50: Best Practices

    Best practices Select an optimum recurrence schedule. Select a recurrence schedule for remote snapshots that minimizes the potential for data loss. Any data written to the primary volume since the most recent remote snapshot was created will be unavailable if the primary volume is unavailable. Consider how much data you are willing to lose in the event of an emergency and set the recurrence for creating remote snapshots accordingly.

  • Page 51: Achieving Off-Site Backup

    Depending on how long you retain the copies of the remote snapshots, you can retrieve data directly from recent remote snapshots rather than using tape backups. Otherwise, retrieve data as you normally would from the tape backup. P4000 Remote Copy user guide...

  • Page 52: Best Practices

    Best practices Retain the most recent primary snapshots in the primary cluster By keeping snapshots on your primary volume, you can quickly roll back a volume to a previous snapshot without accessing off-site backups. When you create a schedule for Remote Copy, specify the number of primary and remote snapshots that you want to retain.

  • Page 53: How This Configuration Works For Nondestructive Rollback

    If the primary volume must be synchronized with other volumes accessed by the same application, consider rolling back the remote volume instead. Figure on page 54 shows rollback of the primary snapshot while leaving the remote snapshots intact. P4000 Remote Copy user guide...

  • Page 54: Nondestructive Rollback From The Primary Snapshot

    Figure 19 nondestructive rollback from the primary snapshot To roll back the remote snapshot, you must first make the remote volume into a primary volume. This stops scheduled creation of remote snapshots, which may jeopardize your high availability, disaster recovery, or routine backup strategies. Figure 20 on page 55 shows rollback of the remote snapshot.

  • Page 55: Best Practices

    Using Remote Copy for data migration or cloning Remote Copy allows migration of data from one application server to another without interrupting the production application server. This capability supports a number of uses such as data mining or content distribution. P4000 Remote Copy user guide...

  • Page 56: Achieving Data Migration

    Achieving data migration You can use Remote Copy to make a complete copy (clone) of one or more volumes without interrupting access to the original volumes. This type of data migration allows you to copy an entire data set for use by a new application or workgroup.

  • Page 57: Configuration After Data Migration

    Configure the application server in the new location to access the new primary volume. Figure 22 on page 57 shows the migration of data after converting a remote volume into a primary volume. Figure 22 Configuration after data migration P4000 Remote Copy user guide...
  • Page 58 Sample Remote Copy configurations...

  • Page 59: Support And Other Resources

    HP. It is integrated with HP Systems Insight Manager. A dedicated server is recommended to host both HP Systems Insight Manager and HP Insight Remote Support Advanced. Details for both versions are available at: http://h18004.www1.hp.com/products/servers/ management/insight-remote-support/overview.html P4000 Remote Copy user guide...

  • Page 60: New And Changed Information In This Edition

    You can find these documents from the Manuals page of the HP Business Support Center website: http://www.hp.com/support/manuals In the Storage section, click Disk Storage Systems and then select P4000 SAN Solutions. HP websites For additional information, see the following HP websites: http://www.hp.com...

  • Page 61: Customer Self Repair

    Some parts do not qualify for CSR. Your HP-authorized service provider will determine whether a repair can be accomplished by CSR. For more information about CSR, contact your local service provider, or see the CSR website: http://www.hp.com/go/selfrepair This product has no customer replaceable components. P4000 Remote Copy user guide...

  • Page 62: Hp Product Documentation Survey

    HP product documentation survey Are you the person who installs, maintains, or uses this HP storage product? If so, we would like to know more about your experience using the product documentation. If not, please pass this notice to the person who is responsible for these activities. Our goal is to provide you with documentation that makes our storage hardware and software products easy to install, operate, and maintain.

  • Page 63: Glossary

    Command-line interface for the SAN/iQ software. cluster A cluster is a grouping of storage systems that create the storage pool from which you create volumes. Centralized Management Console. See HP StorageWorks P4000 Centralized Management Console. P4000 Remote Copy user guide...
  • Page 64 SNMP data. Configuration The Configuration Summary displays an overview of the volumes, snapshots, Summary storage systems, and iSCSI sessions in the HP StorageWorks P4000 SAN Solution. It provides an overview of the storage network broken out by management groups. data center Also known as a “Site.”...
  • Page 65 Contain storage systems that reside in two or more sites Contain storage systems that span subnets Contain multiple VIPs. The cluster can have a single site, and the multiple VIPs make it a multi-site cluster. P4000 Remote Copy user guide...
  • Page 66 Synchronous replication, mirroring or parity protection on a volume-by-volume basis. Protecting data for a volume across all storage systems in the cluster. Network RAID-10, 10+1 or 10+2 is required to protect data in an HP P4000 SAN solution. network window Graphically depicts the status of each storage system.
  • Page 67 The system can keep track of several configuration changes at once. This means you can change configurations, even while a volume is in the midst of a different reconfiguration. P4000 Remote Copy user guide...
  • Page 68 Use traps to have an SNMP tool send alerts when a monitoring threshold is reached. solution pack HP StorageWorks P4000 Windows Solution Pack split mirror A split mirror is a remote snapshot whose relationship to the primary volume has been severed. Split mirrors are usually created for one-time use and then discarded.
  • Page 69 Not used in release 8.0 and later. volume size The size of the virtual device communicated to the operating system and the applications. Volume Shadow Copy Service P4000 Remote Copy user guide...
  • Page 70 VSS Provider HP StorageWorks P4000 VSS Provider is the hardware provider that supports the Volume Shadow Copy Service on the HP P4000 SAN Solution. writable space temporary space Glossary...

  • Page 71: Index

    Remote Copy, for affordable disaster recovery, document for data migration, conventions, for high availability, related information, for nondestructive rollback, documentation for off-site backup and recovery, HP website, providing feedback, P4000 Remote Copy user guide...
  • Page 72 Remote Copy, best practices, configuration diagram, configuration for, glossary using Remote Copy for, for SAN/iQ software and HP StorageWorks P4000 SAN, graphical representations of Remote Copy, pausing scheduled snapshots, planning failover, help remote copy schedules, obtaining,...
  • Page 73 Remote Copy and primary volumes, volume type Remote Copy and remote volumes, changing primary into remote, volumes cloning, cloning and data migration, scheduled snapshots, synchronizing data after failover, pausing or resuming, schedules, planning Remote Copy, P4000 Remote Copy user guide...
  • Page 74 websites customer self repair, HP Subscriber's Choice for Business, product manuals,...

This manual is also suitable for:

Storevirtual 4000

Table of Contents