Need a filesystem with "unlimited" inodes

Matthew Seaman m.seaman at
Tue Jun 9 08:12:20 UTC 2009

Dan Nelson wrote:
> In the last episode (Jun 08), Kelly Jones said:
>> What UFS-like filesystem has unlimited inodes, but is a drop-in
>> replacement for ext3, and is fairly easy to configure?
>> Is UFS2 no longer considered the "best" general-use filesystem?
>> Reason I ask: I'm going to create many small (~1K) files on a 100G
>> disk and thus need at least 100M inodes.
>> "newfs -i" maxes out at ~52M inodes (862 groups * 60864 inodes =~ 52M
>> inodes):
>> # newfs -N -i 1 /dev/da1;: same results as -i 2048
>> /dev/da1: 102400.0MB (209715200 sectors) block size 16384, fragment size
>>         2048 using 862 cylinder groups of 118.88MB, 7608 blks, 60864
>>         inodes.
>> I realize I can use "f 512 -b 4096" to get 200M+ inodes, but I'm willing
>> to experiment w/ a new filesystem, provided it behaves mostly like UFS. 
>> Thoughts?
> At this point you're sort of out of the general-use category :)  You want
> ZFS.  Or rather, you don't want to try and fsck a UFS filesystem with 200M
> inodes.  The three drawbacks I can think of to ZFS are it's hard to boot
> from (although you probably aren't booting from da1), it requires more
> memory than UFS, and there is no ACL support at the moment (not that many
> people used the ACL support for UFS).  If you're already on an amd64 system
> with 4GB or more RAM you'll be fine.

Or store your data in a RDBMS rather than in the filesystem.



Dr Matthew J Seaman MA, D.Phil.                       Flat 3
                                                      7 Priory Courtyard
PGP:         Ramsgate
                                                      Kent, CT11 9PW, UK

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