Cache on Server – The write cache is placed on the PVS server storage. This option provides the lowest performance. Cache on Device Disk – The write cache is placed on the target’s virtual hard disk. Cache in Device RAM – A portion of the target’s RAM is reserved for the write cache, and is therefore Besides standard storage, devices can be designated as volatile read cache (ARC), nonvolatile write cache, or as a spare disk for use only in the case of a failure. Finally, when mirroring, block devices can be grouped according to physical chassis, so that the filesystem can continue in the face of the failure of an entire chassis.
The flash cache is an extension of the database buffer cache that is stored on a flash disk, a storage device that uses flash memory. Because flash memory is faster than magnetic disks, the database can improve performance by caching buffers in the flash cache instead of reading from magnetic disk.
Mar 18, 2011 · In terms of storage, disk quotas can be applied to track and control each individual user’s disk space, helping to prevent the server from filling to capacity without warning. Quotas can also be applied on a per-user basis if some users have needs that necessitate additional storage space.