Hp StoreVirtual 4000 Storage User Manual

HP StoreVirtual Storage Remote Copy UserGuideAbstractThis guide provides information about configuring and using asynchronous replication of storage v

Table 4 Scheduled Remote Copy planning checklist (continued)CharacteristicConfiguration categorydelete the last fully synchronized snapshot. For space

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

Creating the primary snapshot1. In the Primary Snapshot Setup box, click New Snapshot.If you selected a snapshot to start the process, you do not need

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

What the system doesThe system creates the remote snapshot in the cluster that contains the remote volume, and thencopies the primary snapshot onto th

7. Delete the temporary PrimeSync management group.8. Use the initial snapshot that you used for the temporary PrimeSync management group copy,to crea

• Custom setting— The custom setting for remote bandwidth defaults to 32,768 KB, or about4 MB. Use the calculation tool to identify a desired bandwidt

Deleting a remote snapshotCAUTION: Do not delete individual snapshots that are part of a snapshot set. To see associatedsnapshots, select a snapshot,

1. In the tab window, select the Remote Snapshots tab.2. Select a remote snapshot from the list of snapshots on the Remote Snapshots tab.3. Click Remo

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Table 6 Fields for Remote Snapshot Details window (continued)FieldsStatisticThe number of days, hours, minutes, and seconds since the copy beganproces

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

19. Continue until each volume at the top of the window is set up.A green check mark shows the volume is set up.20. Click Create Schedule.The timetabl

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 StoreVirtual Storage User Guide.Using scripting

NOTE: You cannot make a remote volume into a primary volume while a remote snapshotis in progress. Either wait until the remote snapshot copy complete

Example scenarioThe following example illustrates one process for synchronizing data. Remember that synchronizationis optional.Table 7 Timeline of fai

In the simplest case, to synchronize the snapshots, remote copy the remote snapshot back to theoriginal primary volume.Creating a new primary volume a

PrerequisiteStop applications from accessing the volume.CAUTION: Any remote snapshot that has not completed copying is canceled.1. Log in to the manag

Contents1 Understanding and planning Remote Copy...4How Remote Copy works...

Best practice for disassociating management groupsNOTE: Do this only if a group no longer exists, or if instructed by HP Support.1. Log in to both man

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

Figure 8 High availability example configurationHow this configuration works for high availabilityIf the production application server or volumes beco

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

Figure 12 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 off-site backup and recoveryTo use remote snapshots for off-site tape backup, create remote snapshots for access by your tapebackup

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

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

Figure 17 Nondestructive rollback from the primary snapshot• To roll back the remote snapshot, you must first make the remote volume into a primary vo

Figure 18 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 20 Configuration after data migrationUsing Remote Copy for data migration or cloning 45

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

HP websitesFor additional information, see the following HP websites:• http://www.hp.com• http://www.hp.com/go/storage• http://www.hp.com/service_loca

5 Documentation feedbackHP is committed to providing documentation that meets your needs. To help us improve thedocumentation, send any errors, sugges

GlossaryThe following glossary provides definitions of terms used in the LeftHand OS softwareand the HP StoreVirtual Storage.acting primaryvolumeThe r

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

DSM Device Specific Module.DSM for MPIO The HP StoreVirtual DSM for Microsoft MPIO vendor-specific DSM that interfaces with the MicrosoftMPIO framewor

MIB Management Information Base. A database of managed objects accessed by network managementprotocols. An SNMP MIB is a set of parameters that an SNM

RAID rebuild rate The rate at which the RAID configuration rebuilds if a disk is replaced.RAID status Condition of RAID on the storage system:• Normal

site A user-designated location in which storage systems are installed. Multi-Site SAN configurationshave multiple sites with storage systems in each

volume size The size of the virtual device communicated to the operating system and the applications.VSS Provider HP StoreVirtual VSS Provider is the

IndexAaddinga remote snapshot schedule, 20a remote volume, 14remote snapshots, 11affordable disaster recoverybest practices, 38configuration, 35applic

Hhelpobtaining, 46high availabilityand failover, 34and Remote Copy, 34best practices, 34configuration diagram, 31configuration for, 31configuration of

schedules, planning Remote Copy, 9schedulingremote snapshots, 20scripting for failover, 25setting remote bandwidth, 16snapshotscreating application-ma

Table 1 Uses for Remote CopyHow it worksUse Remote Copy forRemote Copy stores remote snapshots on a machine in a geographically separatelocation. The

Planning the remote snapshotPrerequisites for creating a remote snapshot• Log in to both the management group that contains the primary volume and the

1. Create a remote snapshot of the primary volume.2. Wait for the copy to finish.3. Create another remote snapshot of the primary volume.4. Track the

Table 3 Snapshot retention policy and maximum number of retained snapshots (continued)Maximum number of snapshots retainedScheduled remote snapshot re