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Re: Increasing number of inodes after format?

To: "Nathan Scott" <nathans@xxxxxxx>
Subject: Re: Increasing number of inodes after format?
From: roberto@xxxxxxxx
Date: Wed, 9 Jun 2004 09:15:39 +0200 (CEST)
Cc: "Timothy Miller" <miller@xxxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
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In-reply-to: <20040609103252.H1200131@wobbly.melbourne.sgi.com>
References: <40C62F2F.4090801@techsource.com> <20040609103252.H1200131@wobbly.melbourne.sgi.com>
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> On Tue, Jun 08, 2004 at 05:27:11PM -0400, Timothy Miller wrote:
>> I was involved in a discussion a while back where it was explained that
>> ext2/3 allocate a certain maximum number of inodes at format time, and
>> you cannot increase that number later.
>>
>> It was also mentioned that one or more of the journaling file systems
>> (XFS, JFS, Reiser, etc.) either dynamically allocated inodes or could
>> increase the maximum later if the pre-allocated set got used up.
>>
>> Could someone please repeat for me which filesystems have dynamic
>> maximum inode counts?
>
> XFS does dynamic inode allocation, there is no preallocated set.
> Steve also recently implemented dynamic space reclaim for ondisk
> inode clusters too, once they're no longer used.  XFS puts a cap
> on the amount of space that can be used for inodes at mkfs time
> (25% iirc), and this can be adjusted later via "xfs_growfs -m".
>
> I don't know enough about the other filesystems to answer for them
> though.
>
> cheers.
>
> --
> Nathan
>
>
>

Sorry, I'd like to understand the following:

- XFS does allocate (automagically) more inode as needed by the File Systems;
or
- a explicit "xfs_growfs" command (to enlarge the FS) is required?

Thanks,
Roberto


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