Re: [zfs-discuss] ZFS performance falls off a cliff
~# uname -a SunOS nas01a 5.11 oi_147 i86pc i386 i86pc Solaris ~# zfs get version pool0 NAME PROPERTY VALUESOURCE pool0 version 5- ~# zpool get version pool0 NAME PROPERTY VALUESOURCE pool0 version 28 default -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Extremely slow zpool scrub performance
Running a zpool scrub on our production pool is showing a scrub rate of about 400K/s. (When this pool was first set up we saw rates in the MB/s range during a scrub). Both zpool iostat and an iostat -Xn show lots of idle disk times, no above average service times, no abnormally high busy percentages. Load on the box is .59. 8 x 3GHz, 32GB ram, 96 spindles arranged into raidz zdevs on OI 147. Known hardware errors: - 1 of 8 SAS lanes is down- though we've seen the same poor performance when using the backup where all 8 lanes work. - Target 44 occasionally throws an error (less than once a week). When this happens the pool will become unresponsive for a second, then continue working normally. Read performance when we read off the file system (including cache and using dd with a 1meg block size) shows 1.6GB/sec. zpool iostat will show numerous reads of 500 MB/s when doing this test. I'm willing to consider that hardware could be the culprit here- but I would expect to see signs if that were the case. The lack of any slow service times, the lack of any effort at disk IO all seem to point elsewhere. I will provide any additional information people might find helpful and will, if possible, test any suggestions. Thanks in advance, -Don ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] sun (oracle) 7110 zfs low performace fith high latency and high disc util.
Hello! Our company have 2 sun 7110 with the following configuration: Primary: 7110 with 2 qc 1.9ghz HE opterons and 32GB ram 16 2.5" 10Krpm sas disc (2 system, 1 spare) a pool is configured from the rest so we have 13 active working discs in raidz-2 (called main) there is a sun J4200 jbod connected to this device with 12x750GB discs with 1 spare and 11active discs there is another pool configured (called JBOD) Backup: 7110 (converted from x4240) with 2 qc 1.9ghz HE opterons and 8GB ram 16 2.5" 10Krpm sas disc (2 system, 1 spare) a pool is configured from the rest so we have 13 active working discs in raidz-2 (called main) there is a promise wess jbod connected to this device with 12x1T discs with 1 spare and 11active discs there is another pool configured (called JBOD) The two storages are connected with periodic (1 hour) replication All the discs aand other hardware are working properely. Zil is turned off, system is set to assync. the firmware version is fishworks 2010.Q3.2.0. The purpose of the system is to proveide NFSv3 shares for our mini-cloud The system is mission critical. Our problem is, that both devices experience low performace, and high latency (up to 1.5sec on some operations) due to heavy cacheing the main storage-s full input+output bandwitch is about 5MB/sec with ~2000 op/sec from NFSv3 (1950 metadata cache hit/sec, 350 data hit/sec 50 data miss/sec) The very strange thing is: we have very high rates at disc percent of utilization (every disc) due to ~3200 iops in the discs (60 iops / data disc) with 0 size if we initiate a sequencial read or write from one of the nfs clients we get 8-15MB/sec performacce from the system. I'd like to know why it is doing that, how can an iops be 0 length, what can we do about it? Thank you for any help, we really need to solve this. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS performance falls off a cliff
sirket, could you please share your OS, zfs, and zpool versions? -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
