Hi all, I have a home server based on SNV_127 with 8 disks;
2 x 500GB mirrored root pool 6 x 1TB raidz2 data pool This server performs a few functions; NFS : for several 'lab' ESX virtual machines NFS : mythtv storage (videos, music, recordings etc) Samba : for home directories for all networked PCs I backup the important data to external USB hdd each day. I previously had a linux NFS server that I had mounted 'ASYNC' and, as one would expect, NFS performance was pretty good getting close to 900gb/s. Now that I have moved to opensolaris, NFS performance is not very good, I'm guessing mainly due to the 'SYNC' nature of NFS. I've seen various threads and most point at 2 options; 1. Disable the ZIL 2. Add independent log device/s I happen to have 2 x 250GB Western Digital RE3 7200rpm (Raid edition, rated for 24x7 usage etc) hard drives sitting doing nothing and was wondering whether it might speed up NFS, and possibly general filesystem usage, by adding these devices as log devices to the data pool. I understand that an SSD is considered ideal for log devices but I'm thinking that these 2 drives should at least be better than having the ZIL 'inside' the zpool. If adding these devices, should I add them as mirrored or individual to get some sort of load balancing (according to zpool manpage) and perhaps a little bit more performance ? I'm running ZFS version 19 which 'zpool upgrade -v' shows me as having 'log device removal' support. Can I easily remove these devices if I find that they have resulted in little/no performance improvements ? Any help/tips greatly appreciated. Cheers. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
