On 06.05.2011 18:17, Whit Blauvelt wrote:
On Fri, May 06, 2011 at 06:06:02PM +0200, Tomasz Chmielewski wrote:
Read access should be fine though (with noatime mount), and
shouldn't break things?
Nice question.
Even if it is safe to only read (seems it should be), does mounting through
fuse add enough system load to be worth not using? Or is this just about
saving the moment of labor needed to do the mount?
It's not just "fuse add enough system load" - it's the extra work
glusterfs does.
I.e. when reading any file, it sends stat() to every gluster server I
think, for that file.
Try doing this experiment, with these assumptions:
/data - directory containing the files physically
/shared - mounted gluster volume
The directories should be big enough (i.e. so that ls -lR /data takes at
least 20 secs).
time ls -lR /data 1>/dev/null
time ls -lR /shared 1>/dev/null
You'll see how much overhead glusterfs is!
--
Tomasz Chmielewski
http://wpkg.org
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