HP MSA 1040 HP MSA 1040 CLI Reference Guide (762782-001, March 2014) - Page 493
volumes properties continued
View all HP MSA 1040 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 493 highlights
Table 95 volumes properties (continued) Name Type Description cacheoptimization cacheoptimizationnumeric read-ahead-size read-aheadsize-numeric volume-type volume-typenumeric string uint32 string uint32 string uint32 • standard: Optimizes cache for both sequential and random reads. Appropriate for applications that read and write small files in random order, such as transaction-based and database update applications. This is the default. • no-mirror: When this mode is enabled, each controller stops mirroring its cache metadata to the partner controller. This improves write I/O response time but at the risk of losing data during a failover. ULP behavior is not affected, with the exception that during failover any write data in cache will be lost. Numeric equivalents for cache-optimization values. • 0: standard • 2: no-mirror The volume's read-ahead cache setting. • Disabled: Read-ahead is disabled. • Adaptive: Adaptive read-ahead is enabled, which allows the controller to dynamically calculate the optimum read-ahead size for the current workload. • Stripe: Read-ahead is set to one stripe. The controllers treat non-RAID and RAID-1 vdisks internally as if they have a stripe size of 512 KB, even though they are not striped. • 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB: Size selected by a user. Numeric equivalents for read-ahead-size values. • -2: Stripe • -1: Adaptive • 0: Disabled • 524288: 512 KB • 1048576: 1 MB • 2097152: 2 MB • 4194304: 4 MB • 8388608: 8 MB • 16777216: 16 MB • 33554432: 32 MB • -2147483648: Maximum • standard: Standard volume. • standard*: Destination of an in-progress volume copy and cannot be mounted until the copy is complete. • snap-pool: Snap-pool volume. • master volume: Master volume. • snapshot: Snapshot volume. • replication source: Source for an in-progress replication to a secondary volume. Numeric equivalents for volume-type values. • 0: standard • 1: snap-pool • 2: master volume • 3: snapshot • 4: standard* • 8: replication source volumes 493