Hello,
I worked with Bacula spooling to see the effects on Sparc 280R machines (that continue to work very slow without spooling, almost 1000K/s).
I tried with different spooling dimensions (10Mb, 100Mb, 250Mb), the result was almost the same: during a single job backup, speed increased to almost 5000K/s.
BUT : at the end of the job, a final step of Bacula (kind of spool flushing) last a lot of minutes, and during this step, the medium transfer rate decreases.
The final result is then again a medium of 1000K/s...
How should I size the spooling dimensions? Is there any way of calculating the correct size?
What is that last step lowering the total rate?
May I assume that having 2-3 long jobs, this last step well have a little influence on the total rate?
I worked with Bacula spooling to see the effects on Sparc 280R machines (that continue to work very slow without spooling, almost 1000K/s).
I tried with different spooling dimensions (10Mb, 100Mb, 250Mb), the result was almost the same: during a single job backup, speed increased to almost 5000K/s.
BUT : at the end of the job, a final step of Bacula (kind of spool flushing) last a lot of minutes, and during this step, the medium transfer rate decreases.
The final result is then again a medium of 1000K/s...
How should I size the spooling dimensions? Is there any way of calculating the correct size?
What is that last step lowering the total rate?
May I assume that having 2-3 long jobs, this last step well have a little influence on the total rate?
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Gabriele Bulfon - Sonicle S.r.l. Tel +39 028246016 Int. 30 - Fax +39 028243880 Via Felice Cavallotti 16 - 20089, Rozzano - Milano - ITALY http://www.sonicle.com |
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