[Linux-cluster] GFS freezing

[Jon Scottorn]

We already have #2 setup that way.  Also we are not flooding the
network.  I am copying data from with the storage server.  Also.  Here
is what my gfs_tool df displays.  I am wondering if the inodes and such
being so low will cause an issue.  I would think that is shouldn't be
what it is.

SB lock proto = "lock_dlm"
  SB lock table = "SAN1:VserversFS"
  SB ondisk format = 1309
  SB multihost format = 1401
  Block size = 4096
  Journals = 4
  Resource Groups = 2794
  Mounted lock proto = "lock_dlm"
  Mounted lock table = "SAN1:VserversFS"
  Mounted host data = ""
  Journal number = 0
  Lock module flags =
  Local flocks = FALSE
  Local caching = FALSE
  Oopses OK = FALSE

  Type           Total          Used           Free           use%
  ------------------------------------------------------------------------
  inodes         5              5              0              100%
  metadata       66             66             0              100%
  data           182996209      0              182996209      0%


Michael Conrad Tadpol Tilstra wrote:

>On Tue, Jul 05, 2005 at 02:32:00PM -0400, Scott.Money at lycos-inc.com wrote:
>  
>
>>   We are seeing a similar issue. We have a 3 node gfs system that
>>   uses a gnbd server as storage. We originally ran into this problem
>>   quite frequently, but hard-setting our NICs to 100Mbit  full duplex
>>   has limited the system freezes to "large" data transfers. (e.g.
>>   copying 500mb files via scp or creating 500mb Oracle tablespaces).
>>   The good news is that the fencing works ;-)
>>   Let me know if you get any information about this.
>>    
>>
>
>What you describe here sounds more like flooding of the network.  If you
>send too much data over the same network device as the heartbeat&locking
>traffic, you can starve out the heatbeats.  There was a bunch of emails
>about this already on this list.  The way to deal with it is one of
>1: don't ever flood the network, 2: use a provate network for heartbeats
>& lock traffic, 3: use the traffic shaping kernel modules to provide a
>garunteed bandwidth for the heartbeat & locking traffic.
>
>  
>
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>
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