Hi Harry,
On Sun, Jul 10, 2011 at 03:39:36PM +0200, Harald Schmalzbauer wrote:
> The server is at remote site, so I can't hear any mechanicals, but I
> guess "at rest" means stop, thus my worries about extensive repositioning.
Sorry, I am no expert on drives and only use bacula my very self for 6
weeks now.
> I have no backup jobs using the tape drive, so no spool is in use. I
> only use the tape drive for migration (or sometimes copy) jobs. And in
> the disk-pool I use "Use Volume Once = yes", so every job has it's own
> file without interleaved data, which has exactly the size the job
> summary reports.
I found using Spool Data for copy jobs to be faster for my setup. I have
fast local disks for spooling, but some of my disk storage is accessed
vie iSCSI on 1-GBit/s-links.
However, I am currently running a few copy jobs and the limiting factor
seems to be my bacula-sd consuming 1 complete CPU, throttling me at
55MB/s. The CPU is an older 'AMD Athlon(tm) 64 X2 Dual Core Processor
3800+'
> Maybe this was not an issue with slower tape drives. LTO2 would only
> suffer from about 6% performance loss, if my wild guess has any truth...
LTO4 as well here, and no ear next to the drive. However, 'mt status'
won't run as the drive is in use by the copy jobs, how you got that
info?
Regards,
Adrian
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