Letni
Explorer
- Joined
- Jan 22, 2012
- Messages
- 63
ZFS experts..
I have a N36L with a 5 disk RAIDZ pool with NAS (CIFS,NFS, and iSCSI target - used as a few Datastores to an ESXi 5.1 machine). Even with the drives set to spin down after 10 minutes of inactivity, I can tell by the drive-spin-down testing as well as the kWH useage on my Kill-A-Watt that the drives do NOT spin down practically ever.. Only if I shut down my VMs (Windows and Linux) do the drive actually do spin down.
My question is would adding ZIL and L2ARC (more than likely both on a single SSD drive) on a FreeNAS 8.3.0 help with drive spin-down? My thinking is that the ZIL and L2ARC would "buffer" reads and writes (especially coming from the iSCSI/ESXi side) which would give more opportunity for the main spinning drives to spin down.
Thank you,
LetnI
I have a N36L with a 5 disk RAIDZ pool with NAS (CIFS,NFS, and iSCSI target - used as a few Datastores to an ESXi 5.1 machine). Even with the drives set to spin down after 10 minutes of inactivity, I can tell by the drive-spin-down testing as well as the kWH useage on my Kill-A-Watt that the drives do NOT spin down practically ever.. Only if I shut down my VMs (Windows and Linux) do the drive actually do spin down.
My question is would adding ZIL and L2ARC (more than likely both on a single SSD drive) on a FreeNAS 8.3.0 help with drive spin-down? My thinking is that the ZIL and L2ARC would "buffer" reads and writes (especially coming from the iSCSI/ESXi side) which would give more opportunity for the main spinning drives to spin down.
Thank you,
LetnI