Re: measuring RAID arrays performances
On 5/26/2013 4:26 AM, Richard Hector wrote:
> On 26/05/13 15:15, Stan Hoeppner wrote:
>> First there is no such thing as "RAID0". Second, "striping" is only fit
>> for temporary data. The OP is concerned with permanent data storage.
>
>>From mdadm(8):
>
>> Currently, Linux supports LINEAR md devices, RAID0 (striping),
>> RAID1 (mirroring), RAID4, RAID5, RAID6, RAID10, MULTIPATH,
>> FAULTY, and CONTAINER.
>
> And:
>
>> -l, --level=
>> Set RAID level. When used with --create, options
>> are: linear, raid0, 0, stripe, raid1, 1,
>> mirror, raid4, 4, raid5, 5, raid6, 6, raid10, 10,
>> multipath, mp, faulty, container. Obviously
>> some of these are synonymous.
>
> While I agree that RAID0 is a misnomer, since there's no redundancy, we
> have to accept that that's what it's called by the documentation and the
> tools. Or at least, complain (and/or submit patches) to the maintainers
> of the documentation and the tools, rather than here.
In your zeal to "correct" me, you have deprived the OP of a learning
experience. You have "given him a fish". I was attempting to "teach
him to fish". Ask him a year from now and he won't recall that RAID0
isn't really RAID, because he didn't have to go looking for the answer.
--
Stan
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