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Date:      Thu, 24 Jun 2004 14:22:39 +0200
From:      "Daniel Eriksson" <daniel_k_eriksson@telia.com>
To:        "'FreeBSD Current'" <freebsd-current@freebsd.org>
Subject:   Multiple choices for RAID-0, best performance?
Message-ID:  <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAArboJgGwHU0apkIeCcojdKwEAAAAA@telia.com>

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(previously posted on -questions without any replies)

With the recent addition of a geom-enabled vinum, and the discussed (but =
not
yet functional?) geom stripe module, we now have 4 different choices for
software RAID-0 on ATA devices (the other two are regular vinum and
ataraid).

I'm currently using a mix of vinum and ataraid on one of my servers, but =
I
haven't been in a position to do any proper performance measurements yet
(it's a production server).

Are there any obvious performance differences between the different ways =
of
doing RAID-0? Any difference in resource usage?

Also, will the RAID-0 performance (transfer speed and/or resource usage) =
of
ataraid be affected a lot depending on what controller is used? For =
example
would there be any performance difference between ataraid on a =
HPT374-based
card (such as the Highpoint RocketRAID 454) and one of the new Promise =
cards
(which we have really good drivers for afaik).

Daniel Eriksson




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