RAID based on performance or purpose
It is widely said RAID 5 is good for data reads and RAID 10 for data writes, while RAID 10 is more better for reliability of data and more costly, while the concern with RAID 5 is if it fails, we may lose data...
if for a reporting sql server, where it is 95% read, will RAID 5 be a better option, even though RAID 10 is affordable?
what are the pros and cons of it.
thanks
if for a reporting sql server, where it is 95% read, will RAID 5 be a better option, even though RAID 10 is affordable?
what are the pros and cons of it.
thanks
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raid10 should be faster for reads and writes. If you can afford raid10, definetly go with it!
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by configuring the optimal way, you are talking about
*Stripe Unit size and
*Allocation Unit size, right?
also, can you tell what you mean by bottom-barrel RAID controller? i have never heard that term before..
*Stripe Unit size and
*Allocation Unit size, right?
also, can you tell what you mean by bottom-barrel RAID controller? i have never heard that term before..
A bottom barrel RAID controller is simply a cheap and inexpensive RAID controller. Bottom of the barrel simply means- Junk.
I think we're done here? Did you need anything else?
I think we're done here? Did you need anything else?
ASKER
Thanks for your helpful insights.
ASKER
thanks for explaining the contrast of the real cost of RAID5, in case of a failure. So there is no way to have a RAID5 spare disk to take over in event of a failure?
Tim, do you say "raid 5 will never be better than raid 10" because of the failure possibility? ignoring the failure issue of disks , how much slower would RAID10 be compared to RAID5 for reads?