Is 128K block size right size given that file sizes I have is from 70K - 2MB? Please find [root at dsdb1 ~]# dd if=/dev/zero of=/data/big.file bs=128k count=80k 81920+0 records in 81920+0 records out 10737418240 bytes (11 GB) copied, 14.751 seconds, 728 MB/s [root at dsdb1 ~]# echo 3 > /proc/sys/vm/drop_caches [root at dsdb1 ~]# dd of=/dev/null if=/data/big.file bs=128k 81920+0 records in 81920+0 records out 10737418240 bytes (11 GB) copied, 3.10485 seconds, 3.5 GB/s On Wed, Apr 20, 2011 at 10:49 AM, Joe Landman <landman at scalableinformatics.com> wrote: > On 04/20/2011 01:42 PM, Mohit Anchlia wrote: >> >> ?mount >> /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) >> proc on /proc type proc (rw) >> sysfs on /sys type sysfs (rw) >> devpts on /dev/pts type devpts (rw,gid=5,mode=620) >> /dev/sdb1 on /boot type ext3 (rw) >> tmpfs on /dev/shm type tmpfs (rw) >> none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) >> sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) >> /dev/sda1 on /data type ext3 (rw) >> glusterfs#dsdb1:/stress-volume on /data/mnt-stress type fuse >> (rw,allow_other,default_permissions,max_read=131072) > > ok ... > > so gluster is running atop /data/mnt-stress, which is on /dev/sda1 and is > ext3. > > Could you do this > > ? ? ? ?dd if=/dev/zero of=/data/big.file bs=128k count=80k > ? ? ? ?echo 3 > /proc/sys/vm/drop_caches > ? ? ? ?dd of=/dev/null if=/data/big.file bs=128k > > so we can see the write and then read performance using 128k blocks? > > Also, since you are using the gluster native client, you don't get all the > nice NFS caching bits. ?Gluster native client is somewhat slower than the > NFS client. > > So lets start with the write/read speed of the system before we deal with > the gluster side of things. > >> >> >> On Wed, Apr 20, 2011 at 10:39 AM, Joe Landman >> <landman at scalableinformatics.com> ?wrote: >>> >>> On 04/20/2011 01:35 PM, Mohit Anchlia wrote: >>>> >>>> Should that command be there by default? I couldn't find lsscsi >>> >>> How about >>> >>> ? ? ? ?mount >>> >>> output? >>> >>> >>> -- >>> Joseph Landman, Ph.D >>> Founder and CEO >>> Scalable Informatics Inc. >>> email: landman at scalableinformatics.com >>> web ?: http://scalableinformatics.com >>> ? ? ? http://scalableinformatics.com/sicluster >>> phone: +1 734 786 8423 x121 >>> fax ?: +1 866 888 3112 >>> cell : +1 734 612 4615 >>> > > > -- > Joseph Landman, Ph.D > Founder and CEO > Scalable Informatics Inc. > email: landman at scalableinformatics.com > web ?: http://scalableinformatics.com > ? ? ? http://scalableinformatics.com/sicluster > phone: +1 734 786 8423 x121 > fax ?: +1 866 888 3112 > cell : +1 734 612 4615 >
