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ibrix_snap

Creates or deletes file-system snapshots and cleans up after an unsuccessful snapshot session.

Description

ibrix_snap creates a file-system snapshot for clusters that implement supported storage systems.

The snapshot replicates file-system entities and is managed exactly like a standard file system. A

snapshot is active from the moment that it is created.

The first snapshot task is to define the snapshot allocation policy. To do this, run the ibrix_snap

-p command to define the policy type and its parameters. Once set, a snapshot allocation policy

needs to change only if a parameter value changes. When the allocation policy is in effect, create

the snapshot with ibrix_snap -c.

Synopsis

Set the snapshot policy for the specified file system:

ibrix_snap -p -f ORIGINFSNAME [-h HOSTLIST]

By default, the snapshot policy is to mirror the segment ownership. For example, if the file system

has segments 1–6 owned by hosts a, b, c, d, e, and f respectively, the snapshot file system will

have segments 1–6 owned by hosts a, b, c, d, e, and f respectively. The –p option allows you to

override the default policy and specify segment owners according to a round robin pattern. The

segment owners are specified with the -h HOSTLIST option. Using the previous example, to

change the ownership of the segments 1–6 in the snapshot file system to hosts a, c, e, a, c, e

respectively, enter this command:

ibrix_snap –p –f fs2 –h a,c,e

Create a file-system snapshot:

ibrix_snap -c -n SNAPFSNAME -f ORIGINFSNAME [-M]

The command creates snapshot SNAPFSNAME from file system ORIGINFSNAME. The -M option

automatically mounts the snapshot file system.

Delete the specified file-system snapshots:

ibrix_snap -d -f SNAPFSLIST

Clean up the specified invalid snapshot file systems:

ibrix_snap -r -f SNAPFSLIST

List information about file-system snapshots:

ibrix_snap -i [-f SNAPFSLIST]

The command reports information for all file systems or only for those specified in SNAPFSLIST.

List file-system snapshots for all file systems on all hosts:

ibrix_snap -l

Enumerate snapshot file systems:

ibrix_snap -l -f ORIGINFSNAME [–n STRATEGYNAME]

Run the automated snapshot procedure on a file system using the specified snapshot strategy:

ibrix_snap -A -f ORIGINFSNAME –n STRATEGYNAME

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HP X9320 Guía de usuario Pagina 116