Date: Tue, 06 Jul 2010 08:04:21 +0900 From: "hiroshi@soupacific.com" <hiroshi@soupacific.com> To: freebsd-fs@freebsd.org Subject: Re: HAST and CARP Message-ID: <4C3264F5.1090700@soupacific.com> In-Reply-To: <AANLkTimn9VQIcsJ-kbbZ0rONNEMTBVie199C7SBmJBie@mail.gmail.com> References: <4C139F9C.2090305@soupacific.com> <86iq5oc82y.fsf@kopusha.home.net><4C14215D.9090304@soupacific.com><20100613003635.GA60012@icarus.home.lan><20100613074921.GB1320@garage.freebsd.pl><4C149A5C.3070401@soupacific.com><20100613102401.GE1320@garage.freebsd.pl><86eigavzsg.fsf@kopusha.home.net><20100614095044.GH1721@garage.freebsd.pl><868w6hwt2w.fsf@kopusha.home.net><20100614153746.GN1721@garage.freebsd.pl><86zkyxvc4v.fsf@kopusha.home.net> <4C2C43D5.1080907@soupacific.com><86mxubndrp.fsf@kopusha.home.net> <4C2D7615.5070606@soupacific.com><861vbm1hpr.fsf@zhuzha.ua1> <4C2D9C62.4050105@soupacific.com><86wrtez14z.fsf@zhuzha.ua1> <4C2DC801.5080108@soupacific.com><86iq4xx9fy.fsf@kopusha.home.net> <4C2F3E14.1080601@soupacific.com><86pqz3iw33.fsf@kopusha.home.net> <4C31681C.5070406@soupacific.com> <AANLkTimn9VQIcsJ-kbbZ0rONNEMTBVie199C7SBmJBie@mail.gmail.com>
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HI ! > Once you are in a split-brain situation, you have to take manual steps > to repair. > > Set one side as master. > > Then run "hastctl create" on the other box, to reset all the hast > metadata on the devices, and initiate a new sync from the master. > That's I understand. hstctl create xxx and hastctl -f role secondary xxx are almost same manner. > Ideally, any automated scripts would handle all the possible error > conditions and checks, and prevent the systems from getting into the > split-brain situation in the first place. :) (Yeah, a lot easier > said than done.) Other side can only know MASTER was dead, but MASTER once dead, how can MASTER know he is already dead ? Conclusion is once split-brain happen, DO hastctl create xxx. Thanks Hiroshi
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