Re: performance seems extremely bad

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Dale,
it is tough to relate the performance numbers provided by dbench to actual
real-life application's "performance" over a filesystem. dbench usually
reports very low numbers on filesystem implementations via fuse, due to the
marginally increased latency for every meta data operation. But for real
life applications the perfrmance is almost as good as a local disk and
sometimes better for very heavy I/O. Can you compare the dbench numbers (on
the latest TLA patchset) with, say, NFS or other similar network
filesystems?

thanks,
avati

2007/7/5, Dale Dude <dale@xxxxxxxxxxxxxxx>:

Kernel 2.6.15. mainline-2.5 patch 275. fuse 2.6.5

Tested with: dbench -t 10 10. Is performance supposed to be this bad?

Glusterfs /volumes: Throughput 15.8983 MB/sec 10 procs

Bypass glusterfs direct to /volume1: Throughput 65.0482 MB/sec 10 procs

Bypass glusterfs direct to /volume2: Throughput 66.5139 MB/sec 10 procs



=============
client.vol:

volume server1
         type protocol/client
         option transport-type tcp/client     # for TCP/IP transport
         option remote-host 127.0.0.1     # IP address of the remote brick
         option remote-subvolume volumenamespace
end-volume

volume server1vol1
         type protocol/client
         option transport-type tcp/client     # for TCP/IP transport
         option remote-host 127.0.0.1     # IP address of the remote brick
         option remote-subvolume clusterfs1
end-volume


volume server1vol2
         type protocol/client
         option transport-type tcp/client     # for TCP/IP transport
         option remote-host 127.0.0.1     # IP address of the remote brick
         option remote-subvolume clusterfs2
end-volume

volume bricks
  type cluster/unify
  option namespace server1
  option readdir-force-success on  # ignore failed mounts
  subvolumes server1vol1 server1vol2

  option scheduler rr
  option rr.limits.min-free-disk 5 #%
end-volume

volume writebehind   #writebehind improves write performance a lot
  type performance/write-behind
  option aggregate-size 131072 # in bytes
  subvolumes bricks
end-volume

volume readahead
  type performance/read-ahead
  option page-size 65536     # unit in bytes
  option page-count 16       # cache per file  = (page-count x page-size)
  subvolumes writebehind
end-volume

volume iothreads
   type performance/io-threads
   option thread-count 32
   subvolumes readahead
end-volume

==============================
server.vol:

volume volume1
  type storage/posix
  option directory /volume1
end-volume

#volume posixlocks1
  #type features/posix-locks
  #option mandatory on          # enables mandatory locking on all files
  #subvolumes volume1
#end-volume

volume clusterfs1
   type performance/io-threads
   option thread-count 16
   subvolumes volume1
end-volume

#######

volume volume2
  type storage/posix
  option directory /volume2
end-volume

#volume posixlocks2
  #type features/posix-locks
  #option mandatory on          # enables mandatory locking on all files
  #subvolumes volume2
#end-volume

volume clusterfs2
   type performance/io-threads
   option thread-count 16
   subvolumes volume2
end-volume

#######

volume volumenamespace
  type storage/posix
  option directory /volume.namespace
end-volume

###

volume clusterfs
  type protocol/server
  option transport-type tcp/server
  subvolumes clusterfs1 clusterfs2 volumenamespace
  option auth.ip.clusterfs1.allow *
  option auth.ip.clusterfs2.allow *
  option auth.ip.volumenamespace.allow *
end-volume


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--
Anand V. Avati


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