Re: Raw vs Filesystem

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Am Dienstag, 30. März 2004 06:00 schrieb Christopher Browne:
> el_vigia_ec@hotmail.com ("Jaime Casanova") asked:
> > so, the real question is what is the best filesystem for optimal speed
> > in postgresql?
>
> The smart-alec answer would be... "Veritas, of course!"
>
> But seriously, it depends on many factors you have not provided
> information about.
>
> -> Different operating systems support different filesystems; you
>    should probably specify what OS you are using.
>
> -> Hardware choices have ENORMOUSLY more impact on speed than any
>    choice of filesystems.

One method for further optimizing access on database files can be to mount the
partition where the database files are kept in a fashion that omits most of
the bookkeeping of the filesystem, e.g. using the -noatime option.  Any
filesystem that is heavily accessed will greatly benefit from this -
especially if the filesystem resides on a RAID 5 disk array since updating
the access times will cause any checksums to be re-computed and written back
to the array.


hth,

  Torsten

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