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!
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