我在两台机器之间与NFS的性能非常不一致,我似乎无法确定它.
建立：
机器1’视频1’：双5506 w / 12GB内存,8x3TB RAID6上的XFS从’/ mnt / storage’导出为’video1′
机器2’存储1’：Phenom X2 @ 3.2Ghtz w / 8GB ram,5x2TB上的ZFS从/ mnt / storage1-storage导出为’storage1′
本地写入性能：
mackek2@video1:/mnt/storage/testing$dd if=/dev/zero of=localwrite10GB bs=5000k count=2000 2000+0 records in 2000+0 records out 10240000000 bytes (10 GB) copied,16.7657 s,611 MB/s
本地读取性能：
两者都连接到相同的HP千兆位开关,iperf两种方式均可提供坚固的940mbps.
我的问题是,当我从storage1写入video1导出时,性能就到处都是.似乎是前几个(5-7)文件传输演出(我希望尽可能快地移动30-120GB AVCHD或MJPEG文件),性能从900mbps下降到150-180mbps,所以慢到30mbps.如果我重新启动NFS内核服务器,性能会重新启动几次演出.
mackek2@storage1:/mnt/video1/testing$dd if=/dev/zero of=remoteWrite10GB count=2000 bs=5000K 2000+0 records in 2000+0 records out 10240000000 bytes (10 GB) copied,223.794 s,45.8 MB/s mackek2@storage1:/mnt/video1/testing$dd if=/dev/zero of=remoteWrite10GBTest2 count=2000 bs=5000K 2000+0 records in 2000+0 records out 10240000000 bytes (10 GB) copied,198.462 s,51.6 MB/s mackek2@storage1:/mnt/video1/testing$dd if=/dev/zero of=bigfile776 count=7000 bs=2000K 7000+0 records in 7000+0 records out 14336000000 bytes (14 GB) copied,683.78 s,21.0 MB/s mackek2@storage1:/mnt/video1/testing$dd if=/dev/zero of=remoteWrite15GB count=3000 bs=5000K 3000+0 records in 3000+0 records out 15360000000 bytes (15 GB) copied,521.834 s,29.4 MB/s
当事情进展得很快时,客户端上的nfsiostat会给出几毫秒的平均RTT,但是一旦性能下降,它就会飙升到1.5秒以上.此外,在写入发生时,cpu队列深度会跳升到8以上.
现在,当从同一个出口读取时,我得到漂亮的890Mbps给予或采取几mbps的整个读取.
mackek2@storage1:/mnt/video1/testing$dd if=remoteWrite10GBTest2 of=/dev/null 20000000+0 records in 20000000+0 records out 10240000000 bytes (10 GB) copied,89.82 s,114 MB/s mackek2@storage1:/mnt/video1/testing$dd if=remoteWrite15GB of=/dev/null 30000000+0 records in 30000000+0 records out 15360000000 bytes (15 GB) copied,138.94 s,111 MB/s
