*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
Is this bug solved?? I am having similar issues with my Ubuntu server
12.04.04 64 bits. I am using ldap authentication with NFS to mount users
home. The server uses 2 gigabyte ethernet using bonding and there
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
I have been struggling with the same problem for the last few months,
and accidentally stumbled on a fix that seems to work :
1. On clients set rsize=8192,wsize=8192 in /etc/fstab
I suspect that when
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
Without changing anything anywhere, the nightmare begun again.
Locks up as long as for ten minutes. Even sometimes nautilus claiming all bytes
were transferred it locks up anyway.
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*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
Ok, this is my workaround.
I got it working by mounting from the client's fstab with these options:
rw,rsize=32768,wsize=32768
Are the sizes optimal for performance, i have not tested, but seems
pretty ok.
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
I have a 32bit Ubuntu 12.04.2 LTS as an nfs server, which has been working ever
since with Mint 13 64bit client among many others.
I haven't changed anything on it, but normal updates.
Now I installed a
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
+1
* clean install of 12.04 server.
* LDAP AUTH_SYS
* a single nfs client has no noticable problems, as soon as a second client
starts both clients generate high CPU loads on their side ( 90%, Core 2 Duo)
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
I have noticed the same issue running Ubuntu 12.10 as NFSv4 server. The
load averages on two core machine are 2.0, while CPU utilization is
almost at 0%. It's extremely slow comparing to Fedora based NFS
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
I'm having the same issues: high CPU and slowness. Going back to nfs3
just solved to me while I'm waiting for an update.
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*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
+1
updated from 10.10 to 12.04 with more than 70 clients. nfsd starts to
consume loads of CPU when clients start to access files
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*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
It seems that issue is easy to reproduce: I just did it using just two
VirtualBox VMs wit the following steps:
1. Install Ubuntu 12.04.1 Server x64 with default settings (also default
settings of Virtual
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
Another note: I also upgraded one of my 12.04.1 servers to 12.10 (do-
release-upgrade). The issue was not resolved by the new release.
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*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
We also see this problem in our network.
Our setup with NO problems:
SERVER1 NFS server running Ubuntu 11.10 (Kernel 3.0.0-12-server) (2 x Quadcore
Xeon 2.4GHz 16GB Ram)
SERVER2 Webserver running Ubuntu
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
I see the exact same thing as perpetualrabbit: client(s) experience nfs
lockup for several tens of seconds - of the server side ~5 nfs threads
killing the cpu.
This began on upgrading a client from 10.04 LTS
*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
** This bug has been marked a duplicate of bug 879334
nfsd from nfs-kernel-server very slow and system load from 25%-100% from nfsd
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nfs-utils (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/1006446
Title:
I am experiencing the same behavior in a small network with 1 Gb
ethernet connection between client and server. Large files can be moved
over Samba quickly. The same files over NFSv4 move very slow and pause
for long periods of time. I also see the high load due to nfsd threads.
This problem
'top' listing on server with single NFS client trying to copy a single
file.
top - 00:01:50 up 22 min, 1 user, load average: 0.73, 0.50, 0.51
Tasks: 151 total, 4 running, 147 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.9%us, 39.8%sy, 0.0%ni, 58.2%id, 0.0%wa, 1.1%hi, 0.0%si, 0.0%st
Mem:
I have been having a similar problem since upgrading my NFS server from
natty to oneiric two weeks ago. When copying files over an nfs share to
another oneiric machine, my transfers run smooth and quick. However
when transferring files to any machine with an older distribution (I
have one on
I attempted to change my I/O scheduler on the server to deadline as in
post #29 above. I even added elevator=deadline to grub and rebooted,
then confirmed the shared drives were indeed defaulted to deadline,
however there has been no noticeable change in the response.
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After running several days now with the deadline scheduler I can say
that the responsiveness of the system is ok now. The throughput still
needs improvement.
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@Christoph Bartoschek
Any load over the number of cpu cores (X) is not acceptable.
You have X camels. Each camel can carry one sack of flour. If you want to move
more than X sacks of flour, some camels will have to make second trips.
That is how `load´ works, right? Any load over X will make
@perpetualrabbit On an IO bound system high load is normally not a
problem. The processes normally wait for IO and still count for load.
Thus if the hardware is capable of performing 100 IO operations in
parallel a load of 100 is not bad even if there is only one cpu.
These are only NFS
I also see that 12.04 uses cfq as I/O scheduler. 10.04 used deadline.
After switching the I/O scheduler to deadline the load quickly went down
from about 100 to 10. I have to measure whether the performance is
acceptable now.
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I also see that the load goes up when it becomes really slow. I have 128
nfsd threads and 8 cores. The load is currently at 100.
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https://bugs.launchpad.net/bugs/1006446
Title:
nfs4
@christoph
With resources I mean: Our virtual nfs server was assigned 4 virtual cpu's, 8GB
ram and about 8Gbit/s network, depending on how much the other virtual guests
are using the network.
And yours?
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Our servers have 2x4 cores, 48 GiB RAM and 1 Gbit Ethenet each. They are
directly connected via 10 Gbit Ethernet.
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Title:
nfs4 causes enormous
This issue also appears to be an upstream bug, since you tested the
latest upstream kernel. Would it be possible for you to open an
upstream bug report at bugzilla.kernel.org [1]? That will allow the
upstream Developers to examine the issue, and may provide a quicker
resolution to the bug.
If
Adding in the nfs-utils package for review by the server team.
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Title:
nfs4 causes enormous load in ubuntu-server making it unusable
To manage
I see the following suspicious result:
root@d1106i06:~# ps auxwww | grep migr
root 6 0.0 0.0 0 0 ?SJun01 0:00 [migration/0]
root 8 0.0 0.0 0 0 ?SJun01 0:00 [migration/1]
root13 89.8 0.0 0 0 ?SJun01
We see a similar problem. We have a RAID DRBD LVM EXT4 NFS
configuration that worked fine with Ubuntu 10.04. After upgrading to
12.04 LTS the performance dropped significantly. The clients block
often, editing files is a pain and so on. We consider going back to
Ubuntu 10.04.
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I forgot to mention that we see the probelms with NFS and NFS4. It does
not matter which version we use.
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Title:
nfs4 causes enormous load in
@Christoph:
Can you tell me more about your situation:
- How many clients?
- What is mounted and how?
- What kind of authentication (ldap, kerberos, AD, passwd/shadow,...)?
- Real nfs server or virtual?
- What resources (memory, # cpu's, network bandwidth, etc)?
What did you try to diagnose and
- How many clients?
About 20
- What is mounted and how?
The home directories of the users via automount. We use default mount
options but nail it to nfs 3.
- What kind of authentication (ldap, kerberos, AD, passwd/shadow,...)?
NIS
- Real nfs server or virtual?
Real
- What resources
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Title:
nfs4 causes enormous load in ubuntu-server making it unusable
To
All right,
I am doing tests right now, but as far as I can see the
3.4.0-030400-generic kernel has the same behaviour as stock ubuntu
12.04.
With ubuntu server and this 3.4 kernel:
Test:
- all workstation writing a separate 4GB file with `dd´ to /testhome, which
is nfs4 mounted from an
** Package changed: linux-meta (Ubuntu) = linux (Ubuntu)
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Title:
nfs4 causes enormous load in ubuntu-server making it unusable
To manage
I forgot the `top´ example
roland@asselijn:~$ cat top_example
top - 16:08:57 up 13 days, 5:13, 3 users, load average: 7.82, 5.95, 5.28
Tasks: 290 total, 5 running, 285 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 30.2%sy, 0.0%ni, 69.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 :
As this is a server system, there is no firefox or X window system on it.
Apport-collect starts a text-mode browser and in that I could authorize the
collecting of logs, it seems.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Tags added: apport-collected
**
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.4kernel[1] (Not a kernel in the daily directory). Once you've tested
the upstream kernel, please remove the 'needs-upstream-testing' tag(Only
that
You realize this server has been decommissioned, right? I can no longer do real
life test on it.
What I can do is give it a disk (well virtual disk, it's iscsi) and export that
to all workstations and test with that.
Just what I that in pre-production testing. I now know I have to watch out for
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