On Wed, 12 Sep 2007, aragonx@xxxxxxxxxx wrote:
I'm wondering at what point ext3 starts having issues with number of files
in a directory.
For instance, will any of the utilities fail (ls, mv, chown etc) if you
have more than x files in a directory?
At what point does things really start slowing down?
I was told by a coworker that all UNIX varieties have to do an ordered
list search when they have to preform any operations on a directory. They
also stated that if there is more than 100k files in a directory, these
tools would fail.
This seems like a low number to me but I was looking for some expert
analysis. :)
Thanks
Will
I don't think that the tools fail, as much as the command length is
exceeded. Take for example this test log:
$ time du -sh
9.3G .
real 0m5.609s
user 0m0.024s
sys 0m0.544s
$ time ls *|wc
bash: /bin/ls: Argument list too long
0 0 0
real 0m0.578s
user 0m0.527s
sys 0m0.051s
$ time ls|wc
81000 81000 1376689
real 0m0.652s
user 0m0.541s
sys 0m0.066s
Note also that the filesystem features for the mounted ext3 volume are:
has_journal resize_inode dir_index filetype
needs_recovery sparse_super large_file
ed
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