[Samba] acl_xattr vs acl_tdb

[Miguel Medalha]

> A small test gives me total other numbers :-( .
>
> xfs can store 21 to 26 ACEs. It depends on the size of gidnumber.
> ext3 may store 503 to 513 ACEs, also depending on the size of gidnumber.
>
> The test bed:
> fresh created /home partitions with:
>    mkfs.xfs -f /dev/hda6
> for xfs, and
>    mkfs.ext3 /dev/hda6
> for ext3.
>
> only one directory:
>    rmdir /home/dir/ ;mkdir /home/dir/
>
> and a small shell script, which add ACEs:
> /root/acl-test.sh:
>
> #!/bin/sh -ex
>   G=2200000000
> #G=10
>
> while :
>    do
>    G=$(( $G + 1 ))
>
>    setfacl -m g:"$G":rwx /home/dir
>
> done
>
>
>
> OS is Debian Lenny:
> debian:/# cat /etc/debian_version
> 5.0.4
> debian:/# uname -r
> 2.6.26-2-amd64
>
> getfacl&  setfacl has version: 2.2.47
>
> Other extended attributes may reduce the number of avaiable ACEs.
>
> Conclusion:
> ext3 is a better choice then xfs, at least for Debian Lenny.
>
> I have not tested any special tuning options for ext3 or xfs.

Thank you very much for that information!