Oracle-L: RE: Re Raid 5+

From: Markham, Richard <RMarkham_at_hafeleamericas.com>
Date: Mon, 04 Nov 2002 11:09:30 -0800
Message-ID: <F001.004FB3FF.20021104110930@fatcity.com>

Jared

raid 5 is good over a single disk for the read speed and the fact you can rebuild if a disk is lost. A raid 5 write includes the additional overhead of calculating parity, no question about it. My raid 1+0 spindles are faster than my raid 5 when it comes to writes.

-----Original Message-----
Sent: Monday, November 04, 2002 1:54 PM
To: Multiple recipients of list ORACLE-L

>> I cannot fathom Raid 5 being faster than Raid 1 for writes.

>Well in sequential writes like redo log, copy redo log to archive log and
many other cases raid 5 will be faster.

Care to explain how RAID5 will be faster for a redo log write, because I don't have that understanding of it.

If I'm wrong, I welcome the correction.

Jared

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Author: Markham, Richard
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Received on Mon Nov 04 2002 - 13:09:30 CST