Public bug reported: jojo@pc2:~$ lsb_release -rd Description: Ubuntu 10.04.2 LTS Release: 10.04
Found on this kernels: -rw-r--r-- 1 root root 4174144 2011-03-02 03:47 /boot/vmlinuz-2.6.32-30-generic-pae -rw-r--r-- 1 root root 4427232 2011-01-26 01:49 /boot/vmlinuz-2.6.35-25-generic-pae -rw-r--r-- 1 root root 4669168 2011-03-29 00:57 /boot/vmlinuz-2.6.38-7-generic-pae Circumstances: - NFS-Kernel-Server - Gigabit NIC - Client Lucid 10.04.2 LTS Client mounted a share from the server. i.e.: mount server:/video /mnt -o rsize=32768,wsize=32768 Doing this on Client: root@vdr:/mnt# dd if=/dev/zero bs=1M of=zero.file.de count=1024 1024+0 Datensätze ein 1024+0 Datensätze aus 1073741824 Bytes (1,1 GB) kopiert, 73,4087 s, 14,6 MB/s causes a load average of: top - 11:54:00 up 23:26, 4 users, load average: 6.32, 1.87, 0.79 Compared to the same dir exported via samba: top - 11:57:52 up 23:30, 4 users, load average: 1.97, 1.53, 0.86 root@vdr:/video# dd if=/dev/zero bs=1M of=zero2.file.de count=1024 1024+0 Datensätze ein 1024+0 Datensätze aus 1073741824 Bytes (1,1 GB) kopiert, 64,4172 s, 16,7 MB/s And nearly a deney of service is if bigger files are copied: NFS-Kernel-Server-Share, Server: top - 12:09:06 up 23:42, 3 users, load average: 16.05, 5.80, 2.86 Client/vdr: root@vdr:/mnt# rsync -aP filme/vdr/%Unser_taeglich_Gift . sending incremental file list %Unser_taeglich_Gift/ %Unser_taeglich_Gift/2011-03-26.14.25.99.99.rec/ %Unser_taeglich_Gift/2011-03-26.14.25.99.99.rec/001.vdr 2097532591 100% 7.16MB/s 0:04:39 (xfer#1, to-check=6/9) [copy removed after test] On Samba Samba Share: top - 12:12:29 up 23:45, 3 users, load average: 2.09, 4.23, 2.87 auf dem client: root@vdr:/video# rsync -aP filme/vdr/%Unser_taeglich_Gift . sending incremental file list %Unser_taeglich_Gift/ %Unser_taeglich_Gift/2011-03-26.14.25.99.99.rec/ %Unser_taeglich_Gift/2011-03-26.14.25.99.99.rec/001.vdr 729841664 34% 8.45MB/s 0:02:38 Look like an load regression on copying big files on the nfs-client. Compared to same file export the NFS-kernel-server load is up to 8-times bigger. This behavior had frozen/DOS a couple servers here. J. Sauer ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: linux-image-2.6.35-25-generic-pae 2.6.35-25.44~lucid1 ProcVersionSignature: Ubuntu 2.6.35-25.44~lucid1-generic-pae 2.6.35.10 Uname: Linux 2.6.35-25-generic-pae i686 NonfreeKernelModules: nvidia Architecture: i386 Date: Tue Apr 5 12:29:20 2011 ProcEnviron: LANGUAGE= PATH=(custom, user) LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: linux-lts-backport-maverick ** Affects: linux-lts-backport-maverick (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 lucid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/751220 Title: NFS Server reaches much too High load -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs