-----Original Mail----- From: Jung Young Seok [jung.youngseok at gmail.com] Sent: 22.08.13 - 17:19:32 To: gluster-users at gluster.org Subject: Writing performance gets slower when write threadsare many > Dear gluster users, > > We have set up? glusterfs 3.4 on cent 6. 2 Gluster FS servers are > replicated each (2brick x 2). > Glusterfs is mounted on WAS as fuse. > > We realized when there are more thread to write files on gluster fs, it > gets slower on writing. > > We've set 250 thread to write 1M file each repeatedly. In this case we get > under 30 TPS. No NW bandwidth problem. > Is there any way to avoid performance degradation when there are lots of > write threads? That depends on a lot of factors - what interconnect are you using? 1GE? 10GE? RDMA? What are your bricks built on? SATA? SSD? RAID? My first guess would be that interconnect latency and a kernel maximum for some connection count could be the problem. > > Look forward any help. > Thanks. > > Regards, > Youngseok jung
