Re: [Bacula-devel] Multiple clients

[Kern S. <ke...@si...>]

Hello Phil,

Yes, I believe that I see the network performance
bottleneck here with my DLT drive. Of course, by
turning on compression in the File daemon (implemented
in 1.21) the effective network speed will be doubled
or tripled. This will be interesting to "play with" 
some time down the road.

Concerning the idea for a ./configure option: it is noted.
I was attacking it from the makefile end, but your
suggestion made me think about it, and with configure,
it will be much easier. I will add a "--with-client-only"
option in the near future.

Best regards,

Kern

On Tue, 2002-06-11 at 10:24, Phil Stracchino wrote:
> On Tue, Jun 11, 2002 at 10:14:38AM +0200, Kern Sibbald wrote:
> > Hello Phil,
> > 
> > Well, you are really putting Bacula through its 
> > paces. I'm happy to hear that it is holding up and
> > performing well. The good performance is encouraging,
> > because while I attempt to minimize copying the 
> > data, Bacula is not at all optimized. In fact, 
> > 3 or 4 times for every file saved, each daemon walks
> > entirely through its malloc'ed memory chain verifying
> > that the buffers are all intact and that there are
> > no overruns (it has a sentinel on the end of each 
> > buffer). So I see lots of room for performance
> > improvement.
> 
> That's true, but I doubt the memory overhead has a significant impact on 
> overall backup speed unless you have a lot of tape drives running in 
> parallel.  The bottleneck is going to be the streaming I/O performance of 
> the tape drive, or possibly network performance on installations with a 
> slow network and fast tape drives (AIT3, say, or VXA2, on a 10-megabit 
> network).
> 
> 
> > USEFUL TRICK for building File daemons on
> > additional systems: If you want ONLY the File 
> > daemon on another system and you do not have
> > MySQL installed on that system, simply remove the
> > --with-mysql= option from the ./configure, and 
> > Bacula will be built using the internal database.
> > If you don't intend to use the Director on that system,
> > this is perfectly OK since the File daemon doesn't
> > use the database (only the Director and some utilities
> > do).  
> 
> Noted.  For future releases, how about a configure option to build and 
> install only the file daemon, for use on client machines?
> 
> 
> -- 
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