Hp LeftHand P4000 Virtual SAN Appliance Software User Manual

HPP4000 Remote Copy User GuideAbstractThis guide provides information about configuring and using asynchronous replication of storage volumes and snap

completed snapshots. Take the following characteristics of scheduled remote snapshots into accountwhen planning retention policies.• The SAN/iQ softwa

Table 4 Scheduled Remote Copy planning checklistCharacteristicConfiguration categoryScheduled snapshotStart time• Start date (mm/dd/yyyy) for the sche

2 Using Remote CopyFor information about how Remote Copy works and how to plan capacity for Remote Copy, see“Understanding and planning remote copy” (

If you selected a snapshot to start the process, you do not need to create a new snapshot.2. (Optional) If you are using the Application Aware Snapsho

Creating primary snapshots for volume setsWhen you create an application-managed snapshot of a volume in a volume set, the softwarerecognizes that the

IMPORTANT: All remote snapshots must be set up to use the same remote managementgroup.16. Click Update Pending Table Below to add this remote snapshot

NOTE: There may be a delay in remote copy time.What the system doesThe system creates the remote snapshot in the cluster that contains the remote volu

5. Copy the remote snapshot from the temporary PrimeSync management group to the existingremote Site B management group.6. Disassociate the temporary

Figure 5 Calculating a custom value for setting remote bandwidthBest practiceSet the bandwidth speed the same in both directions unless you have an as

3. Click Snapshot Tasks, and then select Delete Snapshot from the menu.4. Click OK.If the snapshot is part of a snapshot setIf the snapshot isnotpart

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Figure 6 Viewing remote snapshot detailsDuring the remote copy process, the Remote Snapshot Details window reports current statistics.When the copy is

Table 5 Fields for Remote Snapshot Details window (continued)FieldsStatisticXs X. N/A signifies completed copies or in-progress copiesnot yet calculat

Planning for scheduled remote snapshots is a crucial initial step in implementing Remote Copy.The following items require planning in advance for succ

Creating the schedule for volume setsWhen you create a schedule to remote snapshot a volume that has associated volumes, the systemautomatically creat

18. Click Update Pending Table Below to add this remote volume setup to the list at the bottom ofthe window.19. Continue until each volume at the top

Editing the schedule to remote snapshot a volumeWhen editing the timetable for a schedule to remote snapshot a volume, you can change thefollowing ite

and review the Snapshot Set field. For more information about volume sets and snapshot sets,see the HP P4000 SAN Solution User Guide.Using scripting f

Using failover to remote volumeIf the primary volume is not available, you can use the wizard to promote the remote volume toan acting primary volume.

Table 6 Timeline of failover (continued)What happensEventTimeActPrimaryVol_1 becomes primaryand active, and usable to applicationserver.Scripted failo

1. Stop the application that is accessing the acting primary volume.2. Create a remote snapshot of the acting primary volume.3. As your target, create

Contents1 Understanding and planning Remote Copy...5How Remote Copy works...

3. Review the snapshot Details tab to ensure you have selected the correct snapshot.4. Click Snapshot Tasks on Details tab, and then select Roll Back

New for release 8.0Consider using the SmartClone feature to create a split mirror. The SmartClone volume is an exactcopy of the volume or snapshot yet

3 Sample Remote Copy configurationsBecause of its flexibility, Remote Copy is useful in a variety of configurations. The sampleconfigurations describe

Figure 10 High availability example configurationHow this configuration works for high availabilityIf the production application server or volumes bec

Failover to the backup application serverTo maintain availability of the applications and the remaining data, the following process occurs:1. A script

Best practicesRemote snapshots with volume replicationUse remote snapshots in conjunction with local, synchronous volume replication, known as Network

Figure 13 High availability during failover-Example configurationAchieving affordable disaster recoveryEven if you do not have clustered application s

Figure 14 Affordable disaster recovery example configurationHow this works for affordable disaster recoveryIf the storage systems in your primary loca

2. Configure application servers to access the primary volume, or if network connections are notfast enough to facilitate reading and writing to the o

Best practicesSelect an optimum recurrence schedule.Select a recurrence schedule for remote snapshots that minimizes the potential for data loss. Anyd

Configuration for high availability...32How this configuration wo

Configuration for off-site backup and recoveryTo use remote snapshots for off-site tape backup, create remote snapshots for access by your tapebackup

NOTE: Retention of snapshots affects the amount of space that is used in the cluster of storagesystems. Balance the number of snapshots to retain with

Figure 18 nondestructive rollback exampleHow this configuration works for nondestructive rollbackYou can choose to roll back either the primary snapsh

Figure 19 nondestructive rollback from the primary snapshot• To roll back the remote snapshot, you must first make the remote volume into a primary vo

Figure 20 nondestructive rollback from the remote snapshotBest practicesRoll back the primary snapshot and keep the remote snapshots as a backup.To en

Configuration for data migrationTo make a copy of a volume in a remote location, configure a cluster of storage systems in theremote location with eno

Figure 22 Configuration after data migration46 Sample Remote Copy configurations

4 Support and other resourcesContacting HPFor worldwide technical support information, see the HP support website:http://www.hp.com/supportBefore cont

New and changed information in this editionThe following additions and changes have been made for this edition:• The following information has been up

GlossaryThe following glossary provides definitions of terms used in the SAN/iQ software andthe HP P4000 SAN Solution.acting primaryvolumeThe remote v

1 Understanding and planning Remote CopyRemote Copy provides a powerful and flexible method for reproducing data and keeping thatreplicated data avail

DSM Device Specific Module.DSM for MPIO The HP P4000 DSM for MPIO vendor-specific DSM that interfaces with the Microsoft MPIOframework.failback After

Multi-Site cluster A cluster of storage that spans multiple sites (up to three). A Multi-Site cluster must meet at leastone of the following condition

RAID status Condition of RAID on the storage system:• Normal - RAID is synchronized and running. No action is required.• Rebuild - A new disk has been

shared snapshot Shared snapshots occur when a clone point is created from a newer snapshot that has oldersnapshots below it in the tree. All the volum

volume set Two or more volumes used by an application. For example, you may set up Exchange to use twovolumes to support a StorageGroup: one for mailb

IndexAaddinga remote snapshot schedule, 21a remote volume, 15remote snapshots, 12affordable disaster recoverybest practices, 39configuration, 36applic

and Remote Copy, 35best practices, 35configuration diagram, 32configuration for, 32configuration of Remote Copy, 35HPtechnical support, 47Iicons for R

creating application-managed, 13, 22, 23creating application-managed for volume sets, 14, 23deleting schedules, 24pausing or resuming, 24scheduling, 2

Copying the primary snapshot to the remote snapshotWhen the primary snapshot is copying to the remote snapshot, the CMC depicts the process witha movi

with asynchronous Remote Copy on a different cluster of storage systems creates a robust,high-availability configuration.Uses for Remote CopyCommon us

Table 2 Remote Copy, SAN/iQ, and storage systemsRemote Copy configurationStorage system levelManagement groups• Create remote snapshots in the same ma

Using schedules for Remote CopyScheduled remote snapshots provide fault tolerance for business continuance and disaster recovery,and a consistent, pre