Stefan Lubitz schrieb:
> [...]
> 08-Oct 22:06 BACKUP3-sd JobId 10: Job write elapsed time = 06:26:12, 
> Transfer rate = 70.36 M bytes/second

The job is writing with 70.36 MB/s to the spool device, which seems to
be ok to me.

> [...]
> 09-Oct 04:53 BACKUP3-sd JobId 10: Despooling elapsed time = 06:44:31, 
> Transfer rate = 67.24 M bytes/second

Later it is despooling from disk to tape with an average of 67.24
MB/s, wich I think is also ok for LTO-4. I get between 75 and 80 MB/s.

>   Rate:                   32364.5 KB/s

The overall throughput (spooling + despooling) is 32 MB/s. This is
because of the extra time spend with first spooling the data to disk.

If you have mostly large files you could try backing up the data
directly. I have one server with a very fast raid that can be backed
up dirctly and has the same throughput when writing to tape, as it has
with despooling from disk.

Ralf

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