[sheepdog-users] Snapshot and Cache stress test

[Valerio Pachera]

Note 4: nothing change with heavy I/O and taking snapshots at the same time.

dd goes in time out.

dd was able to write 337 files of 1M.
At 338th it stopped.

Host side there are no different messages from:
...
Aug 21 11:41:06  ERROR [net 14084] rx_work(534) failed to read a header
Aug 21 11:41:06  ERROR [net 14088] do_read(220) connection is closed
(48 bytes left)
Aug 21 11:41:06  ERROR [net 14088] rx_work(534) failed to read a header
Aug 21 11:41:06  ERROR [net 14078] do_read(220) connection is closed
(48 bytes left)
Aug 21 11:41:06  ERROR [net 14078] rx_work(534) failed to read a header
Aug 21 11:41:06  ERROR [net 14105] do_read(220) connection is closed
(48 bytes left)
Aug 21 11:41:06  ERROR [net 14105] rx_work(534) failed to read a header
...


There's not network or disk I/O.



# collie vdi list
  Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
s big          1   50 GB  796 MB  0.0 MB 2013-08-21 10:00   4fd259
2
s big          2   50 GB   52 MB  768 MB 2013-08-21 11:40   4fd25a
2
s big          3   50 GB   48 MB  808 MB 2013-08-21 11:40   4fd25b
2
s big          4   50 GB   48 MB  844 MB 2013-08-21 11:40   4fd25c
2
s big          5   50 GB   52 MB  880 MB 2013-08-21 11:40   4fd25d
2
s big          6   50 GB   48 MB  920 MB 2013-08-21 11:40   4fd25e
2
s big          7   50 GB  236 MB  952 MB 2013-08-21 11:40   4fd25f
2
s big          8   50 GB   76 MB  1.1 GB 2013-08-21 11:41   4fd260
2
s big          9   50 GB  0.0 MB  1.2 GB 2013-08-21 11:41   4fd261
2
s big         10   50 GB  0.0 MB  1.2 GB 2013-08-21 11:41   4fd262
2
s big         11   50 GB  0.0 MB  1.2 GB 2013-08-21 11:41   4fd263
2
s big         12   50 GB  0.0 MB  1.2 GB 2013-08-21 11:41   4fd264
2
s big         13   50 GB  0.0 MB  1.2 GB 2013-08-21 11:41   4fd265
2
s big         14   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd266
2
s big         15   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd267
2
s big         16   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd268
2
s big         17   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd269
2
s big         18   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd26a
2
s big         19   50 GB  0.0 MB  1.2 GB 2013-08-21 11:42   4fd26b
2
  big          0   50 GB  0.0 MB  1.2 GB 2013-08-21 11:43   4fd26c     2


I had to kill -9 qemu.


Cluster shutdown was able to kill all sheep (that means it was not
forezen, unless dog uses kill -9).