From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <8ccc8ba40608301123s239a0f5ub7c736be6075fea7@mail.gmail.com> Date: Wed, 30 Aug 2006 20:23:00 +0200 From: "Francisco J Ballesteros" To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu> Subject: Re: [9fans] multiple venti servers In-Reply-To: <20060830160249.GA6145@mero.morphisms.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <44F595DD.30202@village.com> <8ccc8ba40608300802m6708d056qb314d6fd28ebc4ef@mail.gmail.com> <20060830160249.GA6145@mero.morphisms.net> Topicbox-Message-UUID: ab274eaa-ead1-11e9-9d60-3106f5b1d025 We start the second venti server (the backup) just to update its arenas with those of the primary one. Also, we format a fossil on the backup machine so we could boot it upon failures of the primary. All clients write to the primary file server (fossil) which has just one venti on its own machine. This is the venti backed up to our secondary venti (once per night). On 8/30/06, William Josephson wrote: > On Wed, Aug 30, 2006 at 09:01:00AM -0700, Tharaneedharan Vilwanathan wrote: > > If I am right, one problem with this approach is it becomes tricky > > when both venti servers have updates but yet to be sync'ed. And, in > > particular, when there are identical data backed up (say, I downloaded > > a CD image in two machines and backed up in these two servers), it > > leaves two copies. It may be safe but it does leave two copies. > > Writes presumably only go to the master. > >