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Jesse, Rich wrote: |
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> http://www.baarf.com |
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> |
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> Pay special attention to the whitepaper "Is RAID 5 Really a Bargain?" by |
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> Cary Millsap, also on the site. |
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> |
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> It's a slow crusade, but gaining strength. And it's about time I |
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> joined, too. |
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|
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baarf assumes you're doing db work in which case they are absolutely |
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correct. I did a recent transition from five drives in a RAID5 to six |
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drives in RAID10 on our Mysql servers and the change was well worth it. |
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Roughly 30% increase in simple writes like an scp from one db to the |
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other. We rolled a number of other changes into the db so it's hard to |
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tell what was disk and what was proper tuning in Mysql at this point. |
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|
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However if you're running a file share that is primarily reads, aka |
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just about every file share in the world, RAID5 will work just fine and |
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give you much more space. Assuming you're got a limited budget and |
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you're doing general file serving I'd err on the side of more space. If |
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you're running specialized applications like email, video editing, |
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databases then you may want to look at other things besides RAID5. |
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|
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kashani |
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-- |
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