Journalled File System general discussion

Dr.Peer-Joachim Koch | 1 Feb 2005 09:38

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General question

Hi,

we're currently planing the update of our file server.
In the moment we are successfully using a HP PA-RISC system
with ~10TB disk space attached (2 FC HBA, 2 Brocade, 2 EMC FC4700).

The HP machine is nearly 5 years old and from our mail server
(SuSE SLOX 4.1) which is also included into the SAN I've
a few benchmarks showing an increase ~ factor 10.

So I'm thinking if linux could replace the HPUX as a
file server.But there are a few questions open:

LVM2 is very close to the HPUX-LVM, but the HP can
use mirroring within a logical volume. Would be
a soft raid stable enough ? Anyone using it ?

Second one, who is using LINUX as a file server for
a few hundred clients with a few TB attached ?
Is JFS stable enough ? I would like to use it, because
our TSM system(backup) likes it ... ;)
I heard some rumors about Linux NFS servers giving up
their work after a certain time (weeks or so).
Again any experience (no more rumors!) ?

Last question, is it possible to use say four VG on three
file servers all connected within the SAN ?

FS1 - VG1 (/dev/sda)
FS2 - VG2 (/dev/sdb)

(Continue reading)

Chris Shafer | 2 Feb 2005 02:15

Weird problem with a file

Hello,

One of my users uploaded a file to JFS partition that appears it might contain
characters from a different character set. The file shows up in the tab
completion list for bash, and in the listing of the directory inode in
jfs_debugfs but when I try to rename it, it can not stat the file. Same when I
try to excute any command on it for that matter. I was curious if there was a
way to rename the file through jfs_debugfs.

Thank you
Chris

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Dave Kleikamp | 2 Feb 2005 20:26

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Re: Weird problem with a file

On Tue, 2005-02-01 at 20:15 -0500, Chris Shafer wrote:
> Hello,
> 
> One of my users uploaded a file to JFS partition that appears it might contain
> characters from a different character set. The file shows up in the tab
> completion list for bash, and in the listing of the directory inode in
> jfs_debugfs but when I try to rename it, it can not stat the file. Same when I
> try to excute any command on it for that matter. I was curious if there was a
> way to rename the file through jfs_debugfs.

You can, but it might be easier to mount the partition with -o
iocharset=utf8, and you should be able to rename the file to an ascii
name, then remount it normally.

To do it through jfs_debugfs, you should find the inode number of the
containing directory, ls -i, and use the "dtree" subcommand in
jfs_debugfs to navigate the directory tree.  If you need to do this, it
shouldn't be too hard to figure out from there.

> Thank you
> Chris
--

-- 
David Kleikamp
IBM Linux Technology Center

Guerra, Jim | 3 Feb 2005 18:49

FW: problem with jfs corrputed inode after system crash


> Shaggy -
> 
>    we just had a system crash with the following kernel messages
> 
> 
> Feb  2 15:40:26 va008 kernel: c016337b
> Feb  2 15:40:26 va008 kernel: PREEMPT SMP 
> Feb  2 15:40:26 va008 kernel: Modules linked in: dm_mod
> Feb  2 15:40:26 va008 kernel: CPU:    3
> Feb  2 15:40:26 va008 kernel: EIP:    0060:[bd_forget+43/96]    Not
> tainted VLI
> Feb  2 15:40:26 va008 kernel: EIP:    0060:[<c016337b>]    Not tainted VLI
> Feb  2 15:40:26 va008 kernel: EFLAGS: 00010206   (2.6.10) 
> Feb  2 15:40:26 va008 kernel: EIP is at bd_forget+0x2b/0x60
> Feb  2 15:40:26 va008 kernel: eax: f07d1adc   ebx: f07d19e4   ecx:
> 039a6f60   edx: f07d1adc
> Feb  2 15:40:26 va008 kernel: esi: f07d1b00   edi: 00000035   ebp:
> f7c73ef0   esp: f7c73eb0
> Feb  2 15:40:26 va008 kernel: ds: 007b   es: 007b   ss: 0068
> Feb  2 15:40:26 va008 kernel: Process kswapd0 (pid: 247,
> threadinfo=f7c72000 task=f7c3e520)
> Feb  2 15:40:26 va008 kernel: Stack: f07d19e4 c0174a08 f07d19e4 f07d19e4
> f7c73ef0 c0174a8d f07d19e4 cc3442bc 
> Feb  2 15:40:26 va008 kernel:        c0175ab3 cc3442c4 cc3442bc 00000080
> c0174dc7 f7c73ef0 00000301 00000080 
> Feb  2 15:40:26 va008 kernel:        f5d0a444 cfa0d344 00000081 c053ac20
> f7c72000 c213ea00 c0174f2f 00000080 
> Feb  2 15:40:26 va008 kernel: Call Trace:
> Feb  2 15:40:26 va008 kernel:  [clear_inode+168/224] clear_inode+0xa8/0xe0

(Continue reading)

Dave Kleikamp | 3 Feb 2005 20:09

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Re: problem with jfs corrputed inode after system crash

On Thu, 2005-02-03 at 11:37 -0500, Guerra, Jim wrote:
> Shaggy -
> 
>    we just had a system crash with the following kernel messages
> 
> 
> Feb  2 15:40:26 va008 kernel: c016337b
> Feb  2 15:40:26 va008 kernel: PREEMPT SMP 
> Feb  2 15:40:26 va008 kernel: Modules linked in: dm_mod
> Feb  2 15:40:26 va008 kernel: CPU:    3
> Feb  2 15:40:26 va008 kernel: EIP:    0060:[bd_forget+43/96]    Not tainted
> VLI
> Feb  2 15:40:26 va008 kernel: EIP:    0060:[<c016337b>]    Not tainted VLI
> Feb  2 15:40:26 va008 kernel: EFLAGS: 00010206   (2.6.10) 
> Feb  2 15:40:26 va008 kernel: EIP is at bd_forget+0x2b/0x60

I haven't seen a crash like this before.  I'm guessing that maybe
inode->i_devices might have gotten corrupted, but I don't know for sure.
bd_forget doesn't do too much.

> after we rebooted fsck.jfs came back with 
> 
> 
> fsck.jfs version 1.1.7, 22-Jul-2004
> processing started: 2/3/2005 11.20.38
> The current device is:  /dev/vg00/lv00
> Open(...READ/WRITE EXCLUSIVE...) returned rc = 0
> Primary superblock is valid.
> The type of file system for the device is JFS.
> Block size in bytes:  4096

(Continue reading)

Guerra, Jim | 7 Feb 2005 15:41

FW: problem with jfs corrputed inode after system crash


  Shaggy -

   That patch you sent worked nicely.  Thank you 

   jfs_fsck ran for 4+ hours  but in the end it worked out.  is there any
other information that you want/need from the system
   to help with a diagnosis ?

  
Jim Guerra
Systems Engineer 
Newsbank, INC

jimguerra <at> newsbank.com
(802) 875-4836  x3066

Dave Kleikamp | 7 Feb 2005 16:42

Picon

Re: FW: problem with jfs corrputed inode after system crash

On Mon, 2005-02-07 at 09:41 -0500, Guerra, Jim wrote:
>   Shaggy -
> 
>    That patch you sent worked nicely.  Thank you 
> 
>    jfs_fsck ran for 4+ hours  but in the end it worked out.

Wow, 4+ hours!

>   is there any
> other information that you want/need from the system
>    to help with a diagnosis ?

I'm not too confident I'll be able to learn much, but I'd like to see
what the contents of that duplicate allocation was.

Can you run jfs_debugfs, and send me the output of "d 3876468"?

Thanks,
Shaggy
--

-- 
David Kleikamp
IBM Linux Technology Center

John S. Bucy | 13 Feb 2005 05:50

me too: JFS on alpha (!= 4k pagesize)


I saw the bug tracker entry about JFS only works for 4k pages; we'd
like to use JFS on alpha so this breaks for us too.  In the meantime,
it should probably refuse to mount rather than oops!

thanks
john

Dave Kleikamp | 16 Feb 2005 21:44

Picon

Re: me too: JFS on alpha (!= 4k pagesize)

On Sat, 2005-02-12 at 23:50 -0500, John S. Bucy wrote:
> I saw the bug tracker entry about JFS only works for 4k pages; we'd
> like to use JFS on alpha so this breaks for us too.  In the meantime,
> it should probably refuse to mount rather than oops!

I've meant to drop such a patch, but never did.  I need to do this in
the 2.4 kernel, but I'm close to a real fix on 2.6.  I can give you a
patch to test.  I currently have one against 2.6.10 and 2.6.11-rc2-mm1.
Let me know what 2.6 kernel you want a patch against and I'll send it to
you.
--

-- 
David Kleikamp
IBM Linux Technology Center

Dave Kleikamp | 16 Feb 2005 22:05

Picon

JFS mailing lists have been migrated to sourceforge.net

JFS is being migrated from the IBM developerworks site to
sourceforge.net.  The mailing lists are migrated, and the migration of
the rest of the site should be complete by Friday.  After that, the old
site should redirect you to the new one.

As this is the first post to the new groups, it is also a test posting,
but I'm assuming it will be successful.

I'm spamming both the old and new lists with this post, so I apologize
if you receive this multiple times.  If anyone wants to respond, please
only cc jfs-discussion <at> lists.sourceforge.net

Thanks,
Shaggy
--

-- 
David Kleikamp
IBM Linux Technology Center

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