Continuing on the best practices theme- how big should the ZIL slog disk be?
The ZFS evil tuning guide suggests enough space for 10 seconds of my synchronous write load- even assuming I could cram 20 gigabits/sec into the host (2 10 gigE NICs) That only comes out to 200 Gigabits which = 25 Gigabytes. I'm currently planning to use 4 32GB SSD's arranged in 2 2 way mirrors which should give me 64GB of log space. Is there any reason to believe that this would be insufficient (especially considering I can't begin to imagine being able to cram 5 Gb/s into the host- let alone 20). Are there any guidelines on how much ZIL performance should increase with 2 SSD slogs (4 disks with mirrors) over a single SSD slog (2 disks mirrored). -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
