Hello,
On 05.10.2005 02:18, Diogo Melo wrote:
Arno Lehmann wrote:
Hello,
On 04.10.2005 21:34, Diogo Melo wrote:
At my work we've done a simultaneous backup with a DLT Tape and after
the full backup, the restore procediment took more time that we would
expect.
Did you turn on spooling and had lots of spool space?
No, I didn't. I'll try this with spool space on. But is there a way to
estimate the optimum spool size easily?
It should be big enough to hold all the jobs you are running simultaneously.
At my work, we use an old DLT-7000. with a native sustained transfer
rate of 7 MB/s. The servers has a commom 100Mb/s LAN. Should an 50MB
spool space be enough?
No. That would mean that data is written in 50MB chunks to tape - just
what you want to avoid, usually.
If I set an extreme large spool space (3GB should be to much?) Does the
record performance go down ?
Here, I use about 24GB spool space, but only because I've not got more
disk space available. On "Full Backup day" for the large clients, I have
to store about 100GB, and so I would prefer having that plus space for
the other, smaller jobs running at that time.
I've read at the Bacula manual that it isn't a recomended
procedure.
Yes, but it seems to work just fine.
Nice :-)
...
Is the performance bigger by doing an simultaneous backup with spool at
the same tape than doing two backups, one before another with spool at
the same tape?
In my case, the overall performance is.
Arno
--
IT-Service Lehmann [EMAIL PROTECTED]
Arno Lehmann http://www.its-lehmann.de
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