I did the same experiment in an VMWare guest (SLES10 x64). The archive was
stored on the vdisk and untarring went to the same vdisk.
The storage backend is sun system with 64 GB RAM, 2*QC cpus, 24 SAS disks with
450 GB, 4 vdevs with 6 disks as RAIDZ2, an Intel X25-E as log device (c2t1d0).
A StorageTek SAS RAID Host Bus Adapters with 256 RAM and BBU for the zpool and
a second HBA for the slog device.
c3 is for the zpool and c2 for slog (c2t1d0)/boot (c2t0d0) devices.
There are actually 140 VMs running and used over NFS from VSphere 4 with two 1
Gb/s links.
zd-nms-s5:/build # iostat -indexC 5
before untarring
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot
device
0.0 396.0 0.0 9428.3 0.0 0.1 0.0 0.2 0 5 0 0 0 0 c2
0.0 14.0 0.0 61.9 0.0 0.0 0.0 2.8 0 1 0 0 0 0
c2t0d0
0.0 382.0 0.0 9366.4 0.0 0.0 0.0 0.1 0 3 0 0 0 0
c2t1d0
265.4 0.0 3631.2 0.0 0.0 1.2 0.0 4.3 0 105 0 0 0 0 c3
9.8 0.0 148.2 0.0 0.0 0.0 0.0 3.4 0 3 0 0 0 0
c3t0d0
8.8 0.0 137.7 0.0 0.0 0.0 0.0 3.6 0 3 0 0 0 0
c3t1d0
....
zd-nms-s5:/build # iostat -indexC 5
during untarring
extended device statistics ---- errors ---
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot
device
0.0 1128.3 0.0 31713.6 0.0 0.2 0.0 0.1 0 12 0 0 0 0 c2
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 0 0 0 0
c2t0d0
0.0 1128.3 0.0 31713.6 0.0 0.2 0.0 0.1 1 12 0 0 0 0
c2t1d0
2005.7 5708.9 7423.7 42041.5 0.1 61.7 0.0 8.0 0 1119 0 0 0 0
c3
82.8 602.2 364.9 2408.4 0.0 4.4 0.0 6.4 1 68 0 0 0 0
c3t0d0
72.4 601.6 288.5 2452.7 0.0 4.2 0.0 6.2 1 61 0 0 0 0
c3t1d0
....
zd-nms-s5:/build # time tar jxf /tmp/gcc-4.4.3.tar.bz2
real 0m58.086s
user 0m12.241s
sys 0m6.552s
Andreas
--
This message posted from opensolaris.org
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
