Patrick P Korsnick wrote:
hi,
i just set up snv_54 on an old p4 celeron system and even tho the processor is
crap, it's got 3 7200RPM HDs: 1 80GB and 2 40GBs. so i'm wondering if there is
an optimal way to lay out the ZFS pool(s) to make this old girl as fast as
possible....
as it stands now i've got the following drive layout:
pri master: 80GB (call it drive1)
pri slave: 40GB (drive 2)
sec master:40GB (drv 3)
sec slave: DVD
(all connected with 80 conductor ribbons)
my partitions are:
drive 1: i've got 2 10GB UFS root slices (so i can do live upgrades), and 1GB
swap slice
i've got one big zpool consisting of a 50GB slice on drive 1 and all of drives 2
& 3.
If the zpool is a dynamic stripe, then yes, you are in the most performant
config.
i'm not sure that this is the optimal layout for striping. i don't need mirroring or
redundancy-- just speed. i'm thinking maybe i'd be better booting off one of the
smaller drives and putting the other two on one controller and putting the zpool on
those only. spanning the two IDE controllers with the single zpool seems like it
might be a bad idea, but i am just postulating here....
Friends don't let friends use RAID-0 (aka just dynamic striping)
I don't think the IDE controllers will be the bottleneck. More likely
you will hit limitations on memory with only a 32-bit processor. Of course,
that all depends on what you are doing, but I wouldn't spend much time trying
to make it be a speed demon, because time is money.
-- richard
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