Media server deduplication pool properties

Table: Media server deduplication pool properties describes the disk pool properties.

Table: Media server deduplication pool properties

Property	Description
Name	The disk pool name.
Storage server	The storage server name. The storage server is the same as the NetBackup media server to which the storage is attached.
Disk volume	For a media server deduplication pool, all disk storage is exposed as a single volume. PureDiskVolume is a virtual name for the storage that is contained within the directories you specified for the storage path and the database path.
Available space	The amount of space available in the disk pool.
Raw size	The total raw size of the storage in the disk pool.
Comment	A comment that is associated with the disk pool.
High water mark	The high water mark is a threshold that indicates the PureDiskVolume is full. When the PureDiskVolume is at the high water mark, NetBackup fails any backup jobs that are assigned to the disk pool storage unit. NetBackup also fails backup jobs if the PureDiskVolume does not contain enough storage for its estimated space requirement. NetBackup again assigns jobs to the storage unit when the capacity of the PureDiskVolume drops below the high water mark. Capacity is regained as backup images expire. NetBackupdoes not assign backup jobs to the disk pool if used space in the PureDiskVolume is greater than the high water mark. The default is 98%.
Low water mark	The low water mark has no affect on the PureDiskVolume.
Limit I/O streams	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. If you select this property, also configure the number of streams to allow per volume. 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.
per volume	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.