Hi, I have some test on 10Gbe against NFS-based storage recently, and found the throughput of writing was not constant, the performance of writing drop down periodically. My nfs client(version 3 and version 4 all tried) resident CentOS 6.6(2.6.32-504.el6.x86_64), NFS server is OpenMediaVault(5 ssd with stripe) On a single mount point(or single nfs client), the avg throughput only can reach 430 MB/s, and two nfs clients aggregation can reach 700 MB/s, I can see there is periodical drop of network traffic graph both client and server side, and I am sure it's a nfs issue by lots of other tests. I also found the nfs client commit procedure happened at the time that writing performance also dropped, and I have read B7 section(http://nfs.sourceforge.net) and think the relationship between them, but no many ideas, can someone help me pinpoint the root cause of this issue? -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
