Re: File System Performance

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Mon Nov 12 2001 - 17:39:17 EST


> Corrections to speed-up the sizeing pass in Amanda:
> * tar.h: Declare dev_null_output.
> * buffer.c (open_archive): Detect when archive is /dev/null.
> (flush_write): Avoid writing to /dev/null.
> * create.c (dump_file): Do not open file if archive is being
> written to /dev/null, nor read file nor restore times.
> Reported by Greg Maples and Tor Lillqvist.
>
> One wonders why.

So when you archive the file set twice (once to compute its size) its
faster. Seems sane enough.
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This archive was generated by hypermail 2b29 : Thu Nov 15 2001 - 21:00:31 EST