Date: Mon, 30 Jun 2008 23:23:24 +0100 From: Hywel Mallett <hywel@hmallett.co.uk> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-geom@freebsd.org Subject: Re: Filesystem replication geom proposal Message-ID: <27A404FA-FDEE-4A8E-A16D-DCBC9E41AED0@hmallett.co.uk> In-Reply-To: <g48sfi$2ng$1@ger.gmane.org> References: <0A8C1986-1DC1-4445-9111-0DEDBBCC6847@hmallett.co.uk> <g3m3se$eau$1@ger.gmane.org> <20080622233638.4hclgmsw8408s4cg@www.hmallett.co.uk> <g48sfi$2ng$1@ger.gmane.org>
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On 29 Jun 2008, at 21:48, Ivan Voras wrote: > > Yes, gmirror would have to grow support for "smart" resilvering, > probably by having a bitmap of changed blocks maintained on the > working drive(s) so it can only update the changed data instead of > whole drives (which would happen now if ggated would support > automatic reconnects). > The problem with that simplistic approach is that because write-order fidelity is not maintained, during the resynchronisation the slave/ secondary is inconsistent.
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