Re: PROBLEM: I/O scheduler problem with an 8 SATA disks raid 5 under heavy load ?

[Guillaume Laurès]

Well, I should have tried to answer my own question earlier... but  
there is still a problem.

A quick reading of Wikipedia later, I can tell the following.
First, the anticipatory scheduler seems to be the worse choice when  
dealing with raid arrays.
Now, a better choice in my case could be:
- the CFQ scheduler for the array in the dom0;
- and the NOOP scheduler for the VBDs in the domUs (seems already  
there by default btw)

However even with CFQ/NOOP I keep getting soft resets, only the  
sata_nv SATA ports, when under load. Any thoughs ?


Thanks to all who did not flame me on this one ...;-)

GoM 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/