Hi All, I noticed a very weird phenomenon when I'm copying data (200KB image files) to our glusterfs storage. When I run only run client, it copies roughly 20 files per second and as soon as I start a second client on another machine, the copy rate of the first client immediately degrade to 5 files per second. When I stop the second client, the first client will immediately speed up to the original 20 files per second. When I run 15 clients, the aggregate throughput is about 8 files per second, much worse than running only one client. Neither CPU nor network is saturated. My volume file is attached. The servers are running on a 66 node cluster and the clients are a 15-node cluster. We have 33x2 servers and at most 15 separate machines, with each server serving < 0.5 clients on average. I cannot think of a reason for a distributed system to behave like this. There must be some kind of central access point. - Wei -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: g.vol URL: <http://gluster.org/pipermail/gluster-users/attachments/20090928/f90fe372/attachment-0001.txt>
