Thank you. And what are the other two jobs ? I have set the write-behind-window-size to 500 Mb and wrote a 100 Mb file, but the speed is still the same. Can you explain why ?
Regards 2015-02-09 13:20 GMT+01:00 Peter P. <[email protected]>: > Thank you. And what are the other two jobs ? > I have set the write-behind-window-size to 500 Mb and wrote a 100 Mb file, > but the speed is still the same. > Can you explain why ? > > Regards > Peter > > 2015-02-08 12:04 GMT+01:00 Rafi K C <[email protected]>: > >> On Sat, 2015-02-07 at 20:41 +0100, Peter Prusi wrote: >> > Hello, >> > >> > I'm new to glusterfs and I dont understand 'the >> > performance.write-behind-window-size' option. I'm using glusterfs 3.5.2 >> > and setup a volume over two nodes connected over 1 GbE. >> > Actually the write performance is about 58 Mb/s. This means glusterfs >> > writes the data simultaneous on both nodes. I'm trying to increase the >> > write speed and I thought this option would cache the data >> > on one node and then distribute to the other. So i could double the >> > speed. I played around with this option, but it has no effect to the >> > write speed. >> >> Write-behind does three jobs with respect to a write-request. One among >> them is, >> >> it will lie to application, which issued the write-request about the >> completion of write and then will perform this write operation in >> background. Basically, For a single inode, it will lie to the >> application until current size of the total lied request which are not >> fulfilled on nodes becomes equal to the window size. This size is >> configurable through performance.write-behind-window-size . >> >> >> > What am I doing wrong or >> > is there another tweak to increase the write >> > speed ? >> >> I'm not familiar with write performance tweaks. Some one more familiar >> with this can comment on this. >> >> >> Regards >> Rafi KC >> > >> > Thank you >> > _______________________________________________ >> > Gluster-users mailing list >> > [email protected] >> > http://www.gluster.org/mailman/listinfo/gluster-users >> >> >> >
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