Hi all,
I'm under the impression that the read speed of my 10x1TB RAID5 array is
limited by the 'single-threaded parity calculation' ? (I'm quoting Phil
Turmel on that and other linux-raid messages I've read seem to confirm
that terminology) I'm running an i7 920 with irqbalance but if
something is single threaded or single CPU bound I'm wondering what I
can do to alleviate it.
iostat reports 83MB/s for each disk, running up to 830MB/s for all 10
disks, but the max read speed of the array is approx 256MB/s.
Would it be better to have 5 (or more) partitions on each disk, create
5xraid5 arrays (each of which would in theory have a separate thread)
and then create a linear array over the top of them to join them together ?
yes...I know this is way overthinking and also a potentially dangerous
to recreate, but I'm curious what the opinions are. I think I'll
probably just end up buying another 1TB drive and making it an 11 disk
RAID6 instead. I want maximum space, maximum speed and maximum
redundancy ;-).
TIA :-)
Simon
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