> > Dear Bacula Users,
>
> > 1. Why FIFO isn't more popular for database dumps backups? Is there any
> > drawback?
>
> > 2. I inserted RedFifo=yes on FileSet Options and configured a simple
> > RunBeforeJob script (below) to test FIFO backup, but the backup job stalls
> > waitng for script termination. Am I missing something?
>
> The FIFO special file created by mkfifo will block for read or write until
> both ends of the FIFO are opened. See man mkfifo(3).
Thanks Josh, I'm aware. I think that's why ReadFifo option exists on Bacula:
"readfifo=yesno If enabled, tells the Client to read the data on a backup and
write the data on a restore to any FIFO (pipe) that is explicitly mentioned in
the FileSet. In this case, you must have a program already running that writes
into the FIFO for a backup or reads from the FIFO on a restore. This can be
accomplished with the RunBeforeJob directive. If this is not the case, Bacula
will hang indefinitely on reading/writing the FIFO. When this is not enabled
(default), the Client simply saves the directory entry for the FIFO.
Unfortunately, when Bacula runs a RunBeforeJob, it waits until that script
terminates, and if the script accesses the FIFO to write into the it, the
Bacula job will block and everything will stall. However, Vladimir Stavrinov as
supplied tip that allows this feature to work correctly. He simply adds the
following to the beginning of the RunBeforeJob script:
exec > /dev/null"
Ps.: I tried the exec > /dev/null
> > [ -p /tmp/tubo ] ||mkfifo /tmp/tubo
>
> > ls -l > /tmp/tubo
>
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