Messages in this thread | | | Date | Mon, 22 Feb 1999 10:40:13 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: NFS fails after 40 minutes of use |
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On Mon, 22 Feb 1999, Mark Lord wrote:
> "Richard B. Johnson" wrote: > > > > In the following I show that about 40 minutes into an across-the > > network-backup, the remote mount-point becomes inaccessible. > > Both machines are running Linux 2.2.1 The server is running a > > Red Hat 5.2 release. The client is running software accumulated > > over several years (not a vendor release). > > > > Neither the client, nor the server appear to run out of memory. > > There are no entries in the logs of either machines to show the > > problem. > > > > This is 100% repeatable. > > I have previously reported a similar problem, > reproduceable with a single machine: > > mount localhost:/ /x > dd if=/dev/zero of=/junk bs=1024k count=200 > diff junk /x/junk > > This often (not always) fails with *differences* on the "diff". > Happens with userland NFS only; not (yet) with knfsd. > > The system is a P2-450Mhz with 128MB and *very fast* > raid0 (18-20MByte/sec) disk I/O. > -- > mlord@pobox.com >
Good. I have also confirmed that it's not a problem with multiple files. One large file (210 megabytes), when copied from a remotely- mounted file-system to /tmp will fail, however, copying it to /dev/null will not!???? Now, the null-sink doesn't have to do locking. Copying to a file-system does --erm...
The mounted file-system becomes inaccessible. It can be `umounted`, then `mounted` and it becomes accessible again. The return message from `cp` is I/O error. `strace /bin/ls /mnt` returns:
[Non pertainent stuff snipped] lstat("/mnt", {st_mode=S_IFDIR|0755, st_size=1024, ...}) = 0 brk(0x11000) = 0x11000 stat("/mnt", {st_mode=S_IFDIR|0755, st_size=1024, ...}) = 0 open("/mnt", O_RDONLY) = 4 fcntl(4, F_SETFD, FD_CLOEXEC) = 0 brk(0x12000) = 0x12000 readdir(4, {d_ino=135169, d_name="."}) = 1 readdir(4, {d_ino=2, d_name=".."}) = 1 readdir(4, 0x11000) = 0 close(4) = 0 _exit(0) = ?
In other words, its perfectly happy and thinks nothing is mounted.
Cheers, Dick Johnson ***** FILE SYSTEM WAS MODIFIED ***** Penguin : Linux version 2.2.1 on an i686 machine (400.59 BogoMips). Warning : It's hard to remain at the trailing edge of technology. Wisdom : It's not a Y2K problem. It's a Y2Day problem.
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