Re: Fwd: Linux MD raid5 and reiser4... Any experience ?

[Mike Hardy <mhardy@h3c.com>]

Slightly off-topic, but:

Simon Valiquette wrote:
> Francois Barre a écrit :


>   On production server with large RAID array, I tends to like very
> much XFS and trust it more than ReiserFS (I had some bad experience
> with ReiserFS in the past).  You can also grow a XFS filesystem live,
> which is really nice.

I didn't know this until recently, but ext2/3 can be grown online as
well (using 'ext2online'), given that you create it originally with
enough block group descriptor table room to support the size you're
growing too.

From the man page for mke2fs:

-E extended-options
       Set  extended options for the filesystem.  Extended options are
       comma separated, and may take  an  argument  using  the  equals
       (’=’) sign.  The -E option used to be -R in earlier versions of
       mke2fs.  The -R option is still accepted for backwards compati-
       bility.   The following extended options are supported:
             stride=stripe-size
                   Configure  the  filesystem  for  a  RAID array with
                   stripe-size filesystem blocks per stripe.

             resize=max-online-resize
                   Reserve  enough  space  so  that  the  block  group
                   descriptor  table  can grow to support a filesystem
                   that has max-online-resize blocks.

I have done it, and it works.

-Mike

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