[sheepdog-users] Snapshot and Cache stress test

[Valerio Pachera]

Hi, I've been repeating a snapshot stress test with dev branch
(0.7.0_197_g9f718d2).

Host side

while true; do
     dog vdi snapshot wheezy_template
      sleep 45
done

Guest side

for n in $(seq 1 27)
do
    dd if=/dev/zero of=c$n bs=1M count=256
    sync
    sleep 5
done

It work for some time, after I get in sheep.log
Dec 17 16:28:09   WARN [gway 3741] wait_forward_request(413) poll timeout
1, disks of some nodes or network is busy. Going to poll-wait again
Dec 17 16:28:09   WARN [gway 3758] wait_forward_request(413) poll timeout
1, disks of some nodes or network is busy. Going to poll-wait again
Dec 17 16:28:09   WARN [gway 3773] wait_forward_request(413) poll timeout
1, disks of some nodes or network is busy. Going to poll-wait again
Dec 17 16:28:09   WARN [gway 3775] wait_forward_request(413) poll timeout
1, disks of some nodes or network is busy. Going to poll-wait again

dog vdi list
  Name        Id    Size    Used  Shared    Creation time   VDI id  Copies
Tag
s wheezy_template     1   10 GB  1.8 GB  0.0 MB 2013-12-17 15:35
5ddf88     2
s wheezy_template     2   10 GB  420 MB  1.5 GB 2013-12-17 15:44
5ddf89     2
s wheezy_template     3   10 GB  528 MB  1.9 GB 2013-12-17 16:26
5ddf8a     2
s wheezy_template     4   10 GB  320 MB  2.4 GB 2013-12-17 16:27
5ddf8b     2
s wheezy_template     5   10 GB  540 MB  2.6 GB 2013-12-17 16:27
5ddf8c     2
s wheezy_template     6   10 GB  924 MB  3.1 GB 2013-12-17 16:27
5ddf8d     2
s wheezy_template     7   10 GB  1.4 GB  4.0 GB 2013-12-17 16:28
5ddf8e     2
s wheezy_template     8   10 GB  1.3 GB  5.4 GB 2013-12-17 16:28
5ddf8f     2
s wheezy_template     9   10 GB  1.5 GB  6.7 GB 2013-12-17 16:29
5ddf90     2
s wheezy_template    10   10 GB  276 MB  8.2 GB 2013-12-17 16:30
5ddf91     2
s wheezy_template    11   10 GB  0.0 MB  8.4 GB 2013-12-17 16:31
5ddf92     2
s wheezy_template    12   10 GB  0.0 MB  8.4 GB 2013-12-17 16:32
5ddf93     2
s wheezy_template    13   10 GB  0.0 MB  8.4 GB 2013-12-17 16:32
5ddf94     2
s wheezy_template    14   10 GB  0.0 MB  8.4 GB 2013-12-17 16:33
5ddf95     2
s wheezy_template    15   10 GB  8.0 MB  8.4 GB 2013-12-17 16:34
5ddf96     2
s wheezy_template    16   10 GB   16 MB  8.4 GB 2013-12-17 16:35
5ddf97     2
s wheezy_template    17   10 GB  0.0 MB  8.4 GB 2013-12-17 16:35
5ddf98     2
s wheezy_template    18   10 GB  0.0 MB  8.4 GB 2013-12-17 16:36
5ddf99     2
s wheezy_template    19   10 GB  0.0 MB  8.4 GB 2013-12-17 16:37
5ddf9a     2
s wheezy_template    20   10 GB  0.0 MB  8.4 GB 2013-12-17 16:38
5ddf9b     2
s wheezy_template    21   10 GB   20 MB  8.4 GB 2013-12-17 16:38
5ddf9c     2
s wheezy_template    22   10 GB  284 MB  8.3 GB 2013-12-17 16:39
5ddf9d     2
s wheezy_template    23   10 GB  0.0 MB  8.6 GB 2013-12-17 16:40
5ddf9e     2
s wheezy_template    24   10 GB  0.0 MB  8.6 GB 2013-12-17 16:41
5ddf9f     2
s wheezy_template    25   10 GB  0.0 MB  8.6 GB 2013-12-17 16:41
5ddfa0     2

Guest side
task XXXX blocked for more than 120 seconds.
echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

The I have to kill -9  the guest.
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