Hi there,
we set up an OpenSolaris/ZFS based storage server with two zpools:
rpool is a mirror for the operating system. tank is a raidz for data
storage.
The system is used to store large video files and has attached 12x1GB
SATA-drives (2 mirrored for the system). Everytime large files are
copied around the system hangs without apparent reason, 50% kernel CPU
usage (so one core is occupied totally) and about 2GB of free RAM (8GB
installed). On idle nothing crashes. Furthermore every scrub on tank
hangs the system up below 1% finished. Neither the /var/adm/messages
nor the /var/log/syslog file contains any errors or warnings. We
limited the ZFS ARC cache to 4GB with an entry in /etc/system.
Does anyone has an idea what's happening there and how to solve the
problem?
Below some outputs which may help.
Thanks and greetings from germany,
Markus Denhoff,
Sebastian Friederichs
# zpool status tank
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c6t2d0 ONLINE 0 0 0
c6t3d0 ONLINE 0 0 0
c6t4d0 ONLINE 0 0 0
c6t5d0 ONLINE 0 0 0
c6t6d0 ONLINE 0 0 0
c6t7d0 ONLINE 0 0 0
c6t8d0 ONLINE 0 0 0
c6t9d0 ONLINE 0 0 0
c6t10d0 ONLINE 0 0 0
c6t11d0 ONLINE 0 0 0
errors: No known data errors
# zpool iostat
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
rpool 37.8G 890G 3 2 94.7K 17.4K
tank 2.03T 7.03T 112 0 4.62M 906
---------- ----- ----- ----- ----- ----- -----
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 39.8G 874G 72K /rpool
rpool/ROOT 35.7G 874G 18K legacy
rpool/ROOT/opensolaris 35.6G 874G 35.3G /
rpool/ROOT/opensolaris-1 89.9M 874G 2.47G /tmp/tmp8CN5TR
rpool/dump 2.00G 874G 2.00G -
rpool/export 172M 874G 19K /export
rpool/export/home 172M 874G 21K /export/home
rpool/swap 2.00G 876G 24K -
tank 1.81T 6.17T 32.2K /tank
tank/data 1.81T 6.17T 1.77T /data
tank/public-share 34.9K 6.17T 34.9K /public-share
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