On Sat, 3 Oct 2009, Jeff Haferman wrote:
When I go into directory "0", it takes about a minute for an "ls -1 |
grep wc" to return (it has about 12,000 files). Directory "1" takes
between 5-10 minutes for the same command to return (it has about 50,000
files).
This seems kind of slow. In the directory with a million files that I
keep around for testing this is the time for the first access:
% time \ls -1 | grep wc
\ls -1 4.70s user 1.20s system 32% cpu 17.994 total
grep wc 0.11s user 0.02s system 0% cpu 17.862 total
and for the second access:
% time \ls -1 | grep wc
\ls -1 4.66s user 1.17s system 69% cpu 8.366 total
grep wc 0.11s user 0.02s system 1% cpu 8.234 total
However, my directory was created as quickly as possible rather than
incrementally over a long period of time so it lacks the
longer/increased disks seeks caused by fragmentation and block
allocations.
That said, directories with 50K files list quite quickly here.
I did an rsync of this directory structure to another filesystem
[lustre-based, FWIW] and it took about 24 hours to complete. We have
Rsync is very slow in such situations.
What version of Solaris are you using? The Solaris version (including
patch version if using Solaris 10) can make a big difference.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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