[CentOS] Re: Anaconda doesn't support raid10
Ruslan Sivak
rsivak at istandfor.com
Fri May 11 22:15:25 UTC 2007
John R Pierce wrote:
>
>> Well the reason not to put /boot on the same spindles as md1 has
>> already been mentioned a few times. Basically flexibility.
>> What do you mean LVM doesn't really do striping? What does globbing
>> mean? Does it mean there is no performance difference between
>> striping LVM and just concatenating 2 raid1's?
>
>
> conventional stripesets tend to use a stripe size around 32k or 128k
> bytes. LVM tends to use a fairly large PE size, often 32MB. LVM
> -is- striping these PE's, if you told it to do that, but its striping
> with this very large chunk size, which means far fewer individual disk
> operation will utilize both logical drives. If you have lots of
> concurrent disk accesses, this may not matter.
> _______________________________________________
The PE could be changed to a lower #. Would this negativelly affect LVM
somehow?
Russ
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