Hi all,
I am experimenting with a few OS's for my new hardware. I plan to have a software RAID5 device for my pgsql data directory.
I have been experimenting with FreeBSD and with Linux, does anyone have any thoughts on whether vinum RAID devices are better than Linux software RAID? Or vice versa... Or no difference at all? Any gotchas I should bear in mind?
Of interest, there are a number of "old school" dba's of my aquantance who swear vociferously whenever the words RAID 5 and Database are mentioned in association with each other.
According to the theory they expound, a database with any significant write activity whatsoever should never be on raid 5, but instead be on raid 0+1.
I've never had a chance to benchmark a comparison between the two and draw my own conclusions, but it might be interesting to do so.
-- Pat
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