[PVE-User] cephfs kerneal module

Lindsay Mathieson lindsay.mathieson at gmail.com
Wed Dec 17 14:08:17 CET 2014


On Wed, 17 Dec 2014 10:17:05 PM Lindsay Mathieson wrote:
> What sort of test results were you wanting?


- Moving VM disks to cephfs works as expected.

- Live Migration works, but the spice client dies, though it can be reconnected. This does not 
happen when the VM is on NFS.

- Snapshots (QCOW2) are very fast, both taking and restoring. 10 - 20 seconds.

- Performance in the VM is much better than I expected from the dd results. 

CrystalDiskMark from a win 7 VM:

CephFS - Writeback
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :  2265.119 MB/s
          Sequential Write :    90.523 MB/s
         Random Read 512KB :  1490.717 MB/s
        Random Write 512KB :   331.157 MB/s
    Random Read 4KB (QD=1) :    23.359 MB/s [  5702.9 IOPS]
   Random Write 4KB (QD=1) :     5.124 MB/s [  1251.0 IOPS]
   Random Read 4KB (QD=32) :    42.396 MB/s [ 10350.5 IOPS]
  Random Write 4KB (QD=32) :     6.446 MB/s [  1573.7 IOPS]

  Test : 1000 MB [C: 41.1% (26.3/63.9 GB)] (x5)
  Date : 2014/12/17 22:19:36
    OS : Windows 7 Professional N SP1 [6.1 Build 7601] (x64)
  

The same benchmark on the same hardware with GlusterFS

GlusterFS - Writeback
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 Shizuku Edition x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :   842.636 MB/s
          Sequential Write :   129.334 MB/s
         Random Read 512KB :   628.412 MB/s
        Random Write 512KB :   110.795 MB/s
    Random Read 4KB (QD=1) :    11.685 MB/s [  2852.9 IOPS]
   Random Write 4KB (QD=1) :     1.901 MB/s [   464.2 IOPS]
   Random Read 4KB (QD=32) :    25.756 MB/s [  6288.0 IOPS]
  Random Write 4KB (QD=32) :     3.028 MB/s [   739.2 IOPS]

  Test : 1000 MB [C: 38.9% (24.9/63.9 GB)] (x5)
  Date : 2014/11/07 12:56:10
    OS : Windows 7 Professional N SP1 [6.1 Build 7601] (x64)


I was planning to do Benchmarks with caching off, but I'm remoted in and the connection 
has gone to crap :(

-- 
Lindsay
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