Hi.
The original OP didn't say what VMS version.
AFAIK, the 127 block dir cache limit (and I don't
think raising ACP_DIRCACHE helped actualy) was
removed in some later VMS version. Maybe 7.x.
And deleting/moving files out of the DIR doesn't
make the DIR file smaller. Use DFU to compress
DIR files.
Jan-Erik.
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
ists.samba
.org]On Behalf Of COLLOT Jean-Yves
Sent: den 3 februari 2004 12:19
To: 'Profaizer, Joe'; '[EMAIL PROTECTED]'
Subject: RE : Tuning for performance
Actually, as you may guess, the bad performance is due to the
number of
files in a directory (in fact, the size of the directory
(.DIR) file), not
of the size of the files themselves. Because of the RMS
directory caching
feature, the real gap is when the directory file is bigger
than 127 blocks.
The bad performances in such a situation (huge .DIR file(s))
are not limited
to Samba, however. Even a simple DIR DCL command may be
quite slow. When
you browse a Samba shared directory through the Windows
Explorer, it's more
or less the same as executing a DIR/SIZE command on this
directory. Is
Samba much slower than DIR/SIZE ?
The only thing I know that can enhance the performance
problem in that case
is to increase the ACP_DIRCACHE sysgen parameter, in order to
make it big
enough to cache the whole big directory. The first access to
the directory
is slow, but subsequent accesses are notably better.
Jean-Yves
-Message d'origine-
De : Profaizer, Joe [mailto:[EMAIL PROTECTED]
Envoye : lundi 2 fevrier 2004 20:28
A : '[EMAIL PROTECTED]'
Objet : Tuning for performance
I just installed samba 2.2.8 and I have a subdirectory that
is very large
(100GB of many files). I'm curious as to what performance
tuning parmeters
I can adjust to help performance. The performance is extremely slow.
Thanks,
..Joe
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