See my email subjected:
"mainline-2.5 performance a known issue?"
Anand Avati wrote:
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 <mailto: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 <http://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 <http://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 <http://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
