Re: [Networker] will staging process slow-down backup to disk?
2007-04-12 11:07:50
Just a warning, staging during the day has some problems as well.
Users cannot recover during the staging. Most of my stagings do hundreds
of Gigs, which means many hours of unavailability and this is a big
limitation.
Yaron Zabary wrote:
mark wragge wrote:
Should backup to disk slow down when staging process is moving data
from disk to tape?
We have Windows clients and networker server 7.3.2 using disk
backup. When the staging process was running the cloning speed was
10mb/s and 2 client backups started (2 streams). The backup speed
reduced to about 1mb/s. When staging is not taking place the backup
speed is greater than 10mb/s depending on number of streams.
Is this expected or do i need to investigate my configuration
further.
I am having similar problems. The only solution, so far, is to make
sure staging is done during the day, when there are no backups. I am
using the following script (Perl on Solaris) from cron to change the
high and low water marks at 14:30, to make sure the next night backups
will have enough space, so that the running backups will not trigger the
staging. The staging policy really needs some improvement.
#!/bin/perl
open(OUT,">/tmp/nsradmin.in.fixstage");
print OUT ". name: $ARGV[0] ; \n\n";
print OUT "\nupdate high water mark (%): $ARGV[2] ; \n";
print OUT "low water mark (%): $ARGV[1] ; \n";
print OUT ("\nquit\n");
close(OUT);
system ("nsradmin -i /tmp/nsradmin.in.fixstage");
sleep 5;
Thanks
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-- Yaron.
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