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тАО09-13-2000 08:31 AM
тАО09-13-2000 08:31 AM
I noticed that fbackup in verbose mode runs very slow. It seems to me that the backup process waits for file name to be written on the console and then writes the next file. Performance degrades dramatically, especially writing a large number of small files. Do I understand the problem correctly?
My solution would be not to use "-v" option, using "-I" instead. I.e.
a bad idea is
fbackup -f /dev/rmt/0m -0vi /
A faster solution could be
fbackup -0i / -I indices/all -f /dev/rmt/0m
Thank you for any comments about good fbackup practices.
Solved! Go to Solution.
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тАО09-13-2000 08:33 AM
тАО09-13-2000 08:33 AM
SolutionIf you use verbose mode and redirect the fbackup output to a file its just as quick as not having verbose mode. We use it all the time.
ie. fbackup ....... >/tmp/daily_backup.out 2>&1
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тАО09-13-2000 08:38 AM
тАО09-13-2000 08:38 AM
Re: Fbackup in verbose mode vs. performance
There have been a number of threads in this forum recently that give more information. I suggest that you use the SEARCH facility anc check FORUMS looking for fbackup.
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тАО09-14-2000 12:58 AM
тАО09-14-2000 12:58 AM
Re: Fbackup in verbose mode vs. performance
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тАО09-14-2000 01:31 PM
тАО09-14-2000 01:31 PM
Re: Fbackup in verbose mode vs. performance
I recently had to update a backup script because of just this problem. The fix I made used the -g graph, -V vol_head, and -I index options for a complete record trail.
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тАО09-15-2000 12:07 AM
тАО09-15-2000 12:07 AM
Re: Fbackup in verbose mode vs. performance
we may need stderr on the console (e.g., to replace media if it is full).
Is it possible to send stderr to both file and console?
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тАО09-15-2000 12:39 AM
тАО09-15-2000 12:39 AM
Re: Fbackup in verbose mode vs. performance
Here is what you might want to try..
fbackup ....... 2>&1 | tee -a /tmp/daily_backup.out
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тАО09-15-2000 12:58 AM
тАО09-15-2000 12:58 AM
Re: Fbackup in verbose mode vs. performance
This construction will send all output to console. If I need to see everything in a log file and errors on console, probably, I cannot not use "-v" option, I may use "-I" instead.
I do not see possibility to get the same result with "tee" and output redirection (stderr to both console and file, stdout to file only).
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тАО09-15-2000 01:19 AM
тАО09-15-2000 01:19 AM
Re: Fbackup in verbose mode vs. performance
(fbackup .... 1>/tmp/output1) 2>&1 | tee -a /tmp/backup.out
this will execute the construct in bracket as one unit, and then any errors generated are sent to a new file descriptor 1 which is then tee'd to your file.
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тАО09-15-2000 01:47 AM
тАО09-15-2000 01:47 AM