Hi all, I'm planning a new build based on a SuperMicro chassis with 16 bays. I am looking to use up to 4 of the bays for SSD devices.
After reading many posts about SSDs I believe I have a _basic_ understanding of a reasonable approach to utilizing SSDs for ZIL and L2ARC. Namely: ZIL: Intel X-25E L2ARC: Intel X-25M So, I am somewhat unclear about a couple of details surrounding the deployment of these devices. 1) Mirroring. Leaving cost out of it, should ZIL and/or L2ARC SSDs be mirrored ? 2) ZIL write cache. It appears some have disabled the write cache on the X-25E. This results in a 5 fold performance hit but it eliminates a potential mechanism for data loss. Is this valid? If I can mirror ZIL, I imagine this is no longer a concern? 3) SATA devices on a SAS backplane. Assuming the main drives are SAS, what impact do the SATA SSDs have? Any performance impact? I realize I could use an onboard SATA controller for the SSDs however this complicates things in terms of the mounting of these drives. thanks ! -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
