Hi Bob, > Striping across two large raidz2s is not ideal for > multi-user use. > You are getting the equivalent of two disks worth of > IOPS, which does > not go very far. More smaller raidz vdevs or mirror > vdevs would be > better. Also, make sure that you have plenty of RAM > installed.
This is new. I thought the RAID level is responsible for overall write/read performance, no matter how many hosts write through NFS. The NFS layer should care about this. The filesystem or RAID itself doesn't know how many hosts are writing. Or am I wrong? I followed this recommendation for choosing the RAID level because we wanted a system with high capacity and high disk fault tolerance: http://blogs.sun.com/relling/entry/raid_recommendations_space_vs_mttdl The Storage 7410 came with 16 GB RAM installed. > What disk configuration (number of disks, and RAID > topology) is the > NetApp using? The Netapp has a double parity RAID with a raid group size of 16. There are 14 disks in 3 shelves, connected with 4 Gb/s fibre channel to the head. I thought double parity RAID (Netapp calls it RAID-DP) is something similar to RAIDZ2. Best regards, Bernd -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
