HAST and CARP

[Mikolaj Golub]

On Mon, 5 Jul 2010 16:34:10 +0200 Pawel Jakub Dawidek wrote:

 PJD> On Mon, Jul 05, 2010 at 08:24:19PM +0900, hiroshi at soupacific.com wrote:
 >> Hi !
 >> 
 >> I checked without ifstate, without CARP !
 >> 
 >> ServerA
 >> #hastctl create zfshast
 >> #hastd
 >> #hastctl role primary zfshast
 >> 
 >> ServerB
 >> #hastctl create zfshast
 >> #hastd
 >> #hastctl role secondary zfshast
 >> 
 >> check synch on ServerA
 >> after nodirty bytes
 >> 
 >> #zpool create hasthome /dev/hast/zfshast
 >> 
 >> then
 >> disconnect ethernet.

 PJD> Split-brain happens when two nodes think they are masters. This is
 PJD> exactly what happens when you disconnect ethernet. In other words you
 PJD> asked for split-brain and you got it.

Ah! When reading hiroshi@'s description I missed that ServerB was set as
primary before ServerA was rebooted (thus it was still primary). So there is
no need in reproducing this :-).

-- 
Mikolaj Golub