Here are the tests: Gluster 3.1.2 servers are CentOS with 4Gb RAM and RAID1 (system) + RAID5 3HD 74Gb Tests ran from XenServer Dom0 (CentOS like system) NFS standard Write: time sh -c "dd if=/dev/zero of=/var/run/sr-mount/db70c449-9ff5-e28c-73ec-25f4fc0b07cf/test/file1.raw bs=512KB count=9765 && sync" 9765+0 records in 9765+0 records out 4999680000 bytes (5.0 GB) copied, 63.675 seconds, 78.5 MB/s real 1m4.118s user 0m0.000s sys 0m7.700s Read: time sh -c "dd if=/var/run/sr-mount/db70c449-9ff5-e28c-73ec-25f4fc0b07cf/test/file1.raw of=/dev/null bs=512KB count=9765 && sync" 9765+0 records in 9765+0 records out 4999680000 bytes (5.0 GB) copied, 68.3861 seconds, 73.1 MB/s real 1m8.939s user 0m0.040s sys 0m4.540s gluster 3.1.2 replicate mode Write time sh -c "dd if=/dev/zero of=/var/run/sr-mount/db70c449-9ff5-e28c-73ec-25f4fc0b07cf/test/file1.raw bs=512KB count=9765 && sync" 9765+0 records in 9765+0 records out 4999680000 bytes (5.0 GB) copied, 152.735 seconds, 32.7 MB/s real 2m33.049s user 0m0.000s sys 0m9.950s Read time sh -c "dd if=/var/run/sr-mount/db70c449-9ff5-e28c-73ec-25f4fc0b07cf/test/file1.raw of=/dev/null bs=512KB count=9765 && sync" 9765+0 records in 9765+0 records out 4999680000 bytes (5.0 GB) copied, 61.8462 seconds, 80.8 MB/s real 1m2.233s user 0m0.000s sys 0m4.300s Thank you Stefano 2011/1/27 Shehjar Tikoo <shehjart at gluster.com> > > Shehjar Tikoo wrote: >> >> What gluster config are you using? > > > My bad.. I didnt read the mail completely. First thing you should try is run a streaming IO write perf test using dd or iozone. Lets see how that performs over the replicated config. Thanks > > > >> > >> Stefano Baronio wrote: >>> >>> Hello, >>> ? ?I have recently set up gluster-3.1.2 as NFS Virtual Disk Storage for >>> XenServer. >>> I have ran a windows vm on it and tested the disk performance: >>> Read: 100MB/s >>> Write: 10MB/s >>> >>> While with standard NFS, on the same servers, we can achieve: >>> Read: 115MB/s >>> Write: 100MB/s >>> >>> We have two servers with local scsi disks with gluster configured in >>> replicate mode. >>> Volume Options: >>> >>> performance.cache-size 1GB >>> >>> write-behind-window-size 512MB >>> >>> performance.stat-prefech 1 >>> >>> Is there any specific option for this configuration? And, is it normal such >>> a poor write performance? >>> >>> >>> Thank you >>> Stefano Baronio >>> >>> >>> >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> Gluster-users mailing list >>> Gluster-users at gluster.org >>> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >> >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >
