I believe the "Maximum Network Buffer Size" should be less than or
equal to the OS's maximum socket send buffer size or maximum socket
receive buffer size, (whichever is smaller). 65536 should be OK.
You don't mention the sd daemon. You might first try turning up
"Maximum Network Buffer Size" in bacula-sd.conf and leaving the client
fd's as default. My guess is that this will increase performance when
the sd is using multiple storage devices and so multiple clients are
connected to the sd concurrently. Otherwise, it might not make much
difference.
In any case, if you have more than a few clients it would be a pain to
change them all. After bumping up the sd'd buffer size and trying it
with an fd set to the default buffer size, try changing just one fd's
buffer size and see if it makes a difference.
Maurizio Santini wrote:
Thank you for your answer but let me rephrase the question.
I have "Maximum Network Buffer Size = 65536" in bacula-fd.conf in the
machine where the tape drive, bacula-dir.conf and bacula-sd.conf are,
but Maximum Network Buffer Size in bacula-fd.conf in the client machines
is set with the default value of 32768.
Now, does it matter that the two values are different or bacula takes
into account only the value of the configuration file where the tape
drive is?
Please let me know if the question is not clear enough.
Thanks,
Maurizio
On Thu, 2005-09-08 at 13:13, Arno Lehmann wrote:
Hello,
Maurizio Santini wrote:
Any hints on this?
nothing definite, sorry.
Thanks,
On Wed, 2005-09-07 at 14:48, Maurizio Santini wrote:
Hi,
It might be a silly question but does the directive "Maximum Network
Buffer Size = <bytes>" need to be set in any bacula-fd.conf (I mean all
clients) or only in the machine where the tape drive reside?
That's a question of network tuning, and to my experience the effects of
different settings depend on lots of factors: Network load, network
adapter hardware, machine load, switches, and all the other things you
can tune in a network stack.
I think you will either have to try different settings, or ask someone
with a really good knowledge about your OSes and hardware and,
especially, network systems.
Arno
Thanks,
Maurizio
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