Thread (7 messages) 7 messages, 6 authors, 2010-01-21

Re: Stupid question regarding RAID-1 access pattern

From: Asdo <hidden>
Date: 2010-01-21 08:09:32

Erno Kuusela wrote:
Robin Hill [off-list ref] writes:

  
quoted
I doubt this would help much really.  If you're reading sequential data
then it's pretty much as quick to keep reading as to seek to the next
chunk.
    
Only if your stripe size is smaller than your bandwidth x seek time.
Break even stripe size for 100MB/s 10ms disks would be 1 MB, so it
might work well with 4-10 MB stripes provided the IO stack is up to it?
  
10ms is the full stroke seek time, I suspect for smaller chunks/seeks 
the time would be *much* shorter...
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