Hp LeftHand P4000 Virtual SAN Appliance Software Manual do Utilizador

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

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

completed snapshots. Take the following characteristics of scheduled remote snapshots into accountwhen planning retention policies.• The LeftHand OS s

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” (

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

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

Viewing the status in the Remote Snapshot Details windowThe Remote Snapshot Details window displays additional details about a remote snapshot.1. In t

Table 6 Fields for Remote Snapshot Details window (continued)FieldsStatisticThe current state of the copy process. Valid values areStarted, Copying, S

Scheduling remote snapshotsIn addition to taking remote snapshots of a volume manually, you can set up a schedule to takesnapshots and save them remot

11. Set the retention interval for the remote snapshot.You can retain up to 50 snapshots for a volume.12. Click OK to close the scheduling window and

16. Click Update Pending Table Below to add this remote volume setup to the list at the bottom ofthe window.The system selects the next volume in the

4. Click Schedule Tasks on the Details tab, and then select Resume Schedule.5. In the Confirm window, click OK.In the Next Occurrence column of the ta

• Configuration of application servers and backup application servers• Task flow for failback (resuming production after failover)• If a volume is par

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

Contents1 Understanding and planning Remote Copy...6How Remote Copy works...

Synchronize the snapshots OrigPrimarySS_1 and ActPrimarySS_1 that were created in steps2 and 3 of “Creating snapshots of data to synchronize” (page 29

Snapshot Set field. For more information about volume sets and snapshot sets, see the HP StoreVirtualStorage User Guide or online help.PrerequisiteSto

Disassociating remote management groupsManagement groups become associated when linked by either remote snapshots or scheduledremote snapshots. Disass

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

Deleting the remote snapshot schedule...26Failover and failback usi

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

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 47

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

initiate a fast and accurate resolution, based on your product’s service level. Notifications may besent to your authorized HP Channel Partner for on-

4 Support and other resources...48Contacting HP...

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

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, 23a remote volume, 16remote snapshots, 13affordable disaster recoverybest practices, 40configuration, 37applic

Hhelpobtaining, 48high availabilityand failover, 36and Remote Copy, 36best practices, 36configuration diagram, 33configuration for, 33configuration of

Sscheduled snapshots, 23pausing or resuming, 25schedules, planning Remote Copy, 11schedulingremote snapshots, 23scripting for failover, 27setting remo

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

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

Table 1 Uses for Remote CopyHow it worksUse Remote Copy forRemote Copy stores remote snapshots on a machine in ageographically separate location. The

Table 2 Remote Copy, LeftHand OS, and storage systemsRemote Copy configurationStorage system levelManagement groups• Create remote snapshots in the sa