"David Barrientos Fernández" <david.barrientositesm.mx> wrote:
DBFn> Does anybody know or anybody could give me a hint on the matter of whether
DBFn> the number of file systems defined in a RS/6000 running AIX 4.3.3 or 5.2
DBFn> affects overall performance?
I wouldn't expect the number of filesystems *mounted* on a machine
to matter a great deal. Usually, only a small amount of the work
done by file-related system calls (open, close, read, write, etc.)
has anything to do with the mount point itself. Needless to say,
this particular overhead is sorta hard to avoid. And I dare say
that it's marginal enough for you not to have to worry about it.
The only way having lots of filesystems could affect performance
is if an oft-used file-related system call has, say, to look up a
filesystem mount point structure in the kernel *every* time it's
called, *and* if the way of looking up the structure is at least
O(N), where N is the number of mount points. So, if those conditions
were true, and you had maybe a few thousand filesystems mounted on
the machine, then you might see some performance degradation.
Do you have a *reason* to believe that the number of filesystems
you have mounted on your machine is actually affecting performance?
I think this is the second time you've posted the question. Why
the persistence? Are you just curious or do you think there's a
"Why shouldn't I top-post?" [url]http://www.aglami.com/tpfaq.html[/url]
"Meanings are another story." [url]http://www.ifas.org/wa/glossolalia.html[/url]