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The disk pool name.
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The storage server name. The storage server is the same as the
NetBackup media server to which the storage is attached.
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The disk volumes that comprise the disk pool.
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The total amount of space available in the disk pool.
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The total raw, unformatted size of the storage in the disk
pool.
The disk appliance may or may not expose the raw size of the
storage.
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A comment that is associated with the disk pool.
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The high water mark is a threshold that triggers image cleanup.
NetBackup expires images that are no longer valid until the low
water mark is reached.
The default is 98%.
When an individual disk
volume is full, NetBackup chooses a different volume in the pool to
write backup images to.
When the disk pool is
full, NetBackup fails any backup jobs that are assigned to the disk
pool storage unit.
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When the capacity of the disk pool returns to the low water
mark, NetBackup again assigns jobs to the storage unit. Capacity is
regained as backup images expire.
The low water mark setting cannot be greater than or equal to
the high water mark setting.
The default is 80%
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Select to limit the number of read and write streams (that is,
jobs) for each volume in the disk pool. A job may read backup
images or write backup images. By default, there is no limit.
When the limit is reached, NetBackup chooses another volume for
write operations, if available. If not available, NetBackup queues
jobs until a volume is available.
Too many streams may degrade performance because of disk
thrashing. Disk thrashing is excessive swapping of data between RAM
and a hard disk drive. Fewer streams can improve throughput, which
may increase the number of jobs that complete in a specific time
period.
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Select or enter the number of read and write streams to allow
per volume.
Many factors affect the optimal number of streams. Factors
include but are not limited to disk speed, CPU speed, and the
amount of memory.
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