| Posted by Markovic, 01-21-2011, 05:26 AM | | Hello,
I have a new dedicated server for a budy site(high cpu usage and i/o). What do you think about raid 0 software? Would it boost perfomances and solve io issues?
thank you
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| Posted by indya, 01-21-2011, 05:36 AM | | RAID 0 (block-level striping without parity or mirroring) has no (or zero) redundancy. It provides improved performance and additional storage but no fault tolerance. Hence simple stripe sets are normally referred to as RAID 0. Any disk failure destroys the array, and the likelihood of failure increases with more disks in the array (at a minimum, catastrophic data loss is twice as likely compared to single drives without RAID). A single disk failure destroys the entire array because when data is written to a RAID 0 volume, the data is broken into fragments called blocks. The number of blocks is dictated by the stripe size, which is a configuration parameter of the array. The blocks are written to their respective disks simultaneously on the same sector. This allows smaller sections of the entire chunk of data to be read off the drive in parallel, increasing bandwidth. RAID 0 does not implement error checking, so any error is uncorrectable. More disks in the array means higher bandwidth, but greater risk of data loss. (Wikipedia)
--- Seems like a waste of time and resources.
Best Regards
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| Posted by prashant1979, 01-21-2011, 06:03 AM | | For you requirement, Raid 10 would be a better option.
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| Posted by eth00, 01-21-2011, 12:29 PM | | I am not really a fan of RAID0 on a server, or even a desktop for that matter.
Another thing to keep in mind is that you can do things to help reduce the IO on the server.
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| Posted by YUPAPA, 01-22-2011, 12:49 PM | | Yes and No
Yes if you are using the server for temporary storage and data on that server is not so important. If you are using to host a mirror, then you can use it.
No, if you have no other redundacy and replication setup at the backend.
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| Posted by matt2kjones, 01-22-2011, 08:03 PM | | Best thing to do with RAID 0 is to combine it with other raid levels. Like mentione above, raid 10, or raid 50. These are basically two raid 1's spanned over raid0, or two raid5's spanned over raid 0. Infact... you can span as many raid arrays over raid 0 as needed to increase IO.
But really, what it comes down it is.... If it is a server, and the data has a lifetime, or say, more than a day... then its not worth using raid 0 alone... combine it with other raid levels to get redundancy.
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