xfs_check running out of memory

xfs_check running out of memory

[Fong Vang]

xfs_check on one of my 64-bit server keeps running out of memory checking a
6.5TB file system with millions of files.  xfsprogs is version 2.9.4  One of
the man pages online mentions a xfs_check64 version but I can't seem to find
this anyway.  Where can I find this tool?

thank you.


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Re: xfs_check running out of memory

[Nathan Scott]

On Thu, 2008-04-03 at 15:56 -0700, Fong Vang wrote:
> 
> 
> 
> 
> xfs_check on one of my 64-bit server keeps running out of memory
> checking a
> 6.5TB file system with millions of files.  xfsprogs is version 2.9.4
> One of
> the man pages online mentions a xfs_check64 version but I can't seem
> to find
> this anyway.  Where can I find this tool?
> 

Thats an IRIX remnant.  On 64 bit Linux systems, xfs_db
(and hence xfs_check) will be built as 64 bit binaries.

Use xfs_repair -n, xfs_check does not scale (and will
hopefully be replaced by xfs_repair -n someday).

-- 
Nathan

Re: xfs_check running out of memory

[Fong Vang]

if that's the case then why is it running out of memory?  This is a 6.5TB
file systems with millions of files.  The system has 24GB of RAM.  It needs
to hold everything in memory?

On Thu, Apr 3, 2008 at 4:03 PM, Nathan Scott <nscott@aconex.com> wrote:

>
> On Thu, 2008-04-03 at 15:56 -0700, Fong Vang wrote:
> >
> >
> >
> >
> > xfs_check on one of my 64-bit server keeps running out of memory
> > checking a
> > 6.5TB file system with millions of files.  xfsprogs is version 2.9.4
> > One of
> > the man pages online mentions a xfs_check64 version but I can't seem
> > to find
> > this anyway.  Where can I find this tool?
> >
>
> Thats an IRIX remnant.  On 64 bit Linux systems, xfs_db
> (and hence xfs_check) will be built as 64 bit binaries.
>
> Use xfs_repair -n, xfs_check does not scale (and will
> hopefully be replaced by xfs_repair -n someday).
>
> --
> Nathan
>
>


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Re: xfs_check running out of memory

[Nathan Scott]

On Thu, 2008-04-03 at 16:11 -0700, Fong Vang wrote:
> 
> if that's the case then why is it running out of memory?  This is a
> 6.5TB file systems with millions of files.  The system has 24GB of
> RAM.  It needs to hold everything in memory?

xfs_check has 3 per-fs-block arrays that are held all in memory, IIRC.
Use xfs_repair -n, which has been revamped to scale a whole lot better
than check.

-- 
Nathan

Re: xfs_check running out of memory

[Fong Vang]

good to know.  Doesn't xfs_check also repair?  with xfs_repair -n, this
doesn't do any repair.  SO the right approach on big volumes would be to run
xfs_repair -n first to detect problem then xfs_repair to fix?

thank you for the info.  much appreciated.  just, curious.  where did you
get this info?

On Thu, Apr 3, 2008 at 4:16 PM, Nathan Scott <nscott@aconex.com> wrote:

> On Thu, 2008-04-03 at 16:11 -0700, Fong Vang wrote:
> >
> > if that's the case then why is it running out of memory?  This is a
> > 6.5TB file systems with millions of files.  The system has 24GB of
> > RAM.  It needs to hold everything in memory?
>
> xfs_check has 3 per-fs-block arrays that are held all in memory, IIRC.
> Use xfs_repair -n, which has been revamped to scale a whole lot better
> than check.
>
> --
> Nathan
>
>


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Re: xfs_check running out of memory

[Nathan Scott]

On Thu, 2008-04-03 at 16:23 -0700, Fong Vang wrote:
> 
> 
> 
> 
> good to know.  Doesn't xfs_check also repair?  with xfs_repair -n,

No, it doesn't.

>  this doesn't do any repair.  SO the right approach on big volumes
> would be to run xfs_repair -n first to detect problem then xfs_repair
> to fix?

Sure - whatever floats your boat.

> thank you for the info.  much appreciated.  just, curious.  where did
> you get this info?

>From the source.

cheers.

-- 
Nathan