-Re: MultiMaster HBase: --backup really needed ?
Jean-Daniel Cryans 2013-12-09, 17:44
The problem with having a bunch of master racing is that it's not evident
for the operator who won, so specifying --backup to all but one master
ensures that you always easily know where the master is.
Relevant code from HMaster.java:
// If we're a backup master, stall until a primary to writes his address
On Mon, Dec 9, 2013 at 9:37 AM, Bryan Beaudreault
> I've run HBase from version 0.90.2 to our current 0.94.6 (CDH 4.3) and have
> never specified a --backup option on any of my commands with regard to the
> master. You're correct that they race to be active, and failover is
> completely automatic in the case of one master going down.
> TBH I've never even heard of a --backup argument, so I'm wondering if it is
> something extremely old or extremely new :)
> On Mon, Dec 9, 2013 at 6:24 AM, Manuel de Ferran
> <[EMAIL PROTECTED]>wrote:
> > Greetings,
> > I'm playing without MultiMaster, and I was wondering if --backup is
> > needed.
> > As far as I have observed, masters race to be the active one. Is there
> > drawback in not mentioning --backup on additional nodes ?
> > Regards,
> > --
> > Manuel DE FERRAN