Disk 100% busy

[Chuck Swiger]

Francisco wrote:
> On Mon, 17 Oct 2005, Brad Knowles wrote:
>>     Note that RAID-1 is the second worst-case for mail server 
>> performance -- it accelerates reads (if you have mirror 
>> load-balancing), but all writes are required to be held until complete 
>> on both disks.  The only worse case would be RAID-5, where you have to 
>> write (or re-write) an entire RAID block at once, plus the parity 
>> information.
> 
> Coming late into the thread...
> What is a good raid level for a maildir IMAP server? RAID 10 (or 0+1 as 
> others call it).

If you're using maildir, that is one of the situations which works pretty well 
with RAID-5, although RAID-10 is also (always? :-) a good choice.

-- 
-Chuck