Re: [Xen-users] Xen and High Availability

[Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx>]

Randy Katz wrote:
> On 2/26/2011 6:56 AM, Miles Fidelman wrote:
>
> Miles, excellent, thanks. What version of DRBD are you currently on?
8.014 - I think this is the Lenny Package - a lot of new features came 
in with 8.2, but it's easier to stay with the packages
> You say you're only using 1 NIC on each machine, so you did NOT use a 
> cross-cable on the second
> NIC between the machines as is recommended? 
Ooops - I am using the 2nd port for cross-connect.  Didn't have my 
morning coffee when I wrote things up.  What I'm not doing is redundant 
external connectivity.
> Why are you using RAID10 with LVM? Couldn't you just
> have one large VG that included all the drives? Have you had any 
> drives fail within the RAID10 yet?
LVM does nothing to protect against disk failures - it's just for 
managing blocks of disk space.  The RAID10 gives me protection against 
drive failures, while maximizing use of disk space and protecting 
against the RAID5/6 "hole."
Yes, I've had a drive fail.  the RAID10 kept me going and made 
replacement easy.
Miles



--
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra



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