Zitat von ALyarskiy <bacula-forum < at > backupcentral.com>:
Zitat von ALyarskiy <bacula-forum < at > backupcentral.com>:
How can i limit writing jobs to 1 without limiting spooling jobs?
I want to have only one job writing on the tape but spool other jobs
in parallel.
This is the default as far as i understand. The tape is locked
exclusive from one writer while other jobs which run concurrently will
spool data as long as the maximum spool size is not reached. Works
fine here but you need a really fast spool area if you want to feed
something like LTO-4/5/6 at full speed.
Regards
Andreas
It is true for jobs with SpoolData=yes, but i have few jobs that
have SpoolData=no, so they write data right on the tape.
I want to limit jobs that have SpoolData=no by 1 concurrent, so only
1 job could write data on the tape, and permit the rest jobs with
SpoolData=yes to spool data on local drive concurrently (5-7 streams).
You might try the "Maximum Concurrent Jobs" directive for the tape
device but i guess with this you will block the despooling until all
non spooling jobs have passed. Why do you want to have spooling and
non-spooling jobs anyway for the same device?
Regards
Andreas
Yes, now i use "Maximum Concurrent Jobs" limitation on device level.
I want to write large jobs right on tape ( usually > 50 Gb) - there are no
network bottlenecks for this clients, and the rest (there are may be networks
bottlenecks sometimes) spool to the local drive.
When local spool used backup process have to read from client, write on local
drive, then read from it and write the backup to the tape. For large backups it
is HUGE overhead. Also there is problem when you have 4-5 large backups in same
time - local drive becomes bottleneck (i have 2 Gb network). So it is
reasonable to have a possibility to limit concurrent jobs at different levels.
For example - 6 Jobs running in same time, 2 of them are large and writing
directly to the tape one by one, rest 4 are spooling to local drive and waiting
those 2 to complete.
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