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MaxAttach NAS 6000 Administration Guide
Setting Up Persistent Storage Manager
Persistent Storage Manager Configuration
From this page, you can modify the various aspects of the Persistent Storage Manager using
pull-down selectors. Some of the options will be display-only if any persistent images are
active. The Restore Defaults button will re-establish the system defaults.
Configuration Fields
The following fields allow you to configure the timing and characteristics of your persistent
image snapshot.
n
Maximum Persistent Images: Specifies the maximum number of active persistent
images supported by the server, up to a maximum of 250. If starting another persistent
image would exceed this number the system will delete an old persistent image.
Quiescent Period: Prior to starting a persistent image, the system will wait for a
n
period of relative inactivity on the volume being imaged. The default value will allow
systems to start an image with a consistent file set and a minimal time-out. This value
may be reduced or increased by experienced administrators for system optimization.
Reducing the Quiescent Period will allow persistent images to begin on systems where
disk inactivity is rare, at the possible expense of synchronization problems within
applications which are concurrently writing to multiple files.
Quiescent Time-Out: Specifies the amount of time the server should retry starting
n
a persistent image. A persistent image won't start until a period of relative inactivity, set
by the Quiescent Period. If an interval longer than Quiescent Time-Out passes before
the persistent image can begin it will be abandoned.
Cache Full Warning Threshold: Defines the percentage of cache space which,
n
when consumed, will trigger warning messages to the system event log.
Begin Persistent Image Deletions: Defines the percentage of cache space which,
n
Chapter #7 - Persistent Storage Manager
11/07/01 -- Revision 2.0.03A
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Undoing Writes on Read-Write Images
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Viewing and Changing Image Read-Write Attributes
and Retention Weight
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View image context within a Schedule Group.
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Managing Persistent Image Schedules
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Creating New Image Schedule Items
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Deleting Existing Schedule Items
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Viewing and Changing Schedule Item Properties
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Using Disaster Recovery
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Restoring a Volume set Image
Chapter #7 - Persistent Storage Manager
Setting Up Persistent Storage Manager
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