above afr with afr as a subvolume On Fri, Jan 23, 2009 at 12:59 AM, Evan <_Gluster at devnada.com> wrote: > Where should I put the write-behind translator? > Just above afr with afr as a subvolume? Or should I put it just above my > localBrick volume and below afr? > > > Here is the output using /dev/zero: > # time dd if=/dev/zero of=/mnt/gluster/disktest count=1024 bs=1024 > 1024+0 records in > 1024+0 records out > 1048576 bytes (1.0 MB) copied, 1.90119 s, 552 kB/s > > real 0m2.098s > user 0m0.000s > sys 0m0.016s > > # time dd if=/dev/zero of=/tmp/disktest count=1024 bs=1024 > 1024+0 records in > 1024+0 records out > 1048576 bytes (1.0 MB) copied, 0.0195388 s, 53.7 MB/s > > real 0m0.026s > user 0m0.000s > sys 0m0.028s > > > Thanks > > > On Thu, Jan 22, 2009 at 12:52 PM, Anand Avati <avati at zresearch.com> wrote: > >> Do you have write-behind loaded on the client side? For IO testing, >> use /dev/zero instead of /dev/urandom. >> >> avati >> >> On Fri, Jan 23, 2009 at 2:14 AM, Evan <_Gluster at devnada.com> wrote: >> > I have a 2 node single process AFR setup with 1.544Mbps bandwidth >> between >> > the 2 nodes. When I write a 1MB file to the gluster share it seems to >> AFR to >> > the other node in real time killing my disk IO speeds on the gluster >> mount >> > point. Is there anyway to fix this? Ideally I would like to see near >> real >> > disk IO speeds from/to the local gluster mount point and let the afr >> play >> > catch up in the background as the bandwidth becomes available. >> > >> > Gluster Spec File (same on both nodes) http://pastebin.com/m58dc49d4 >> > IO speed tests: >> > # time dd if=/dev/urandom of=/mnt/gluster/disktest count=1024 bs=1024 >> > 1024+0 records in >> > 1024+0 records out >> > 1048576 bytes (1.0 MB) copied, 8.34701 s, 126 kB/s >> > >> > real 0m8.547s >> > user 0m0.000s >> > sys 0m0.372s >> > >> > # time dd if=/dev/urandom of=/tmp/disktest count=1024 bs=1024 >> > 1024+0 records in >> > 1024+0 records out >> > 1048576 bytes (1.0 MB) copied, 0.253865 s, 4.1 MB/s >> > >> > real 0m0.259s >> > user 0m0.000s >> > sys 0m0.284s >> > >> > >> > Thanks >> > >> > _______________________________________________ >> > Gluster-users mailing list >> > Gluster-users at gluster.org >> > http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users >> > >> > >> > > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > > -- Raghavendra G -------------- next part -------------- An HTML attachment was scrubbed... URL: http://zresearch.com/pipermail/gluster-users/attachments/20090123/0dffce15/attachment.htm
