Silicon Graphics InfiniteStorage 4000 Series, Настройка и обслуживание

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110 Deleting a Snapshot Group
 endDate
– A specific date on which you want to stop creating a snapshot image
and end the copy-on-write operation. The format for entering the date is
MM:DD:YY
. An example of this option is
endDate=11:26:11
.
 noEndDate
– Use this option if you do not want your scheduled copy-on-write
operation to end. If you later decide to end the copy-on-write operations you
must re-enter the
create snapGroup
command or the
create
consistencyGroup
command and specify an end date.
 timesPerDay
– The number of times that you want the schedule to run in a
day. An example of this option is
timesPerDay=4
.
If you also use the
scheduleInterval
option, the firmware chooses between the
timesPerDay
option and the
scheduleInterval
option by selecting the
lowest value of the two options. The firmware calculates an integer value for the
scheduleInterval
option by dividing 1440 by the
scheduleInterval
option value that you set. For example, 1440/180 = 8. The firmware then compares
the
timesPerDay
integer value with the calculated
scheduleInterval
integer
value and uses the smaller value.
To remove a schedule, use the
create snapGroup
command or the
create
consistencyGroup
command and set the
enableSchedule
parameter to
FALSE
. The
enableSchedule
parameter set to
FALSE
turns off the schedule, but
not creating snapshot images.
Deleting a
Snapshot
Group When you delete a snapshot image from a snapshot group, the system performs the
following actions:

Deletes the snapshot image from the storage array

Releases the repository’s reserve space for reuse within the snapshot group

Disables all the associated snapshot volumes that exist for the deleted snapshot
image
For a consistency group you can delete:

A single snapshot image

Multiple snapshot images that have the same sequence number and creation
timestamp
When a snapshot image(s) is deleted from a consistency group, the system performs
the following actions:

Deletes the snapshot image from the storage array

Releases the repository’s reserve space for reuse within the consistency group

Moves any member volume, associated with the deleted snapshot image(s), to a
Stopped state

Disables the member snapshot volumes associated with the deleted snapshot
image(s)