Very low disk performance on 5.x

[Eric Anderson]

Poul-Henning Kamp wrote:
> In message <42761FA7.1030500 at centtech.com>, Eric Anderson writes:
> 
>>I'll be honest here, I don't care much if the speed difference between 
>>4.X and 5.X is measureable, or whatever.  What I find is a little 
>>telling of an issue somewhere, is that READS are slower than WRITES! 
>>This is totally bogus to me - [...]
> 
> 
> If the disk has bad sectors or other hardware issues, this is not
> an atypical result.


Don't mean to be terse here, but I'm talking about the same test done an 
two different RAID5 configurations, with different disks, and not just 
me - other users in this very thread see the same issue..

I'm not an idiot, with a stupid problem here - this is a real problem, 
not a user created one.  It isn't catastrophic, but come on - 2x 
performance difference between reads and writes?  I wouldn't think twice 
if writes were 50% speed as reads, but it's the other way around.

I'm tired of beating this with a stick - why doesn't anyone just trust 
the fact that something isn't right, and try to help find the problem 
and fix it?   I'm not familiar with debugging the kernel, or source code 
enough to find it by myself.

Eric




-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
A lost ounce of gold may be found, a lost moment of time never.
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