From: "Russ Cox" <rsc@swtch.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] multiple venti servers
Date: Wed, 30 Aug 2006 16:27:19 -0400 [thread overview]
Message-ID: <ee9e417a0608301327h45147c38yef41950630dabdea@mail.gmail.com> (raw)
In-Reply-To: <dac0a5820608300901g4e1a0d12sb1ce0737747243f1@mail.gmail.com>
> 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.
You are not right.
Since venti coalesces writes, it doesn't matter if both servers sync
to each other. You'll waste a little bandwidth resending some writes,
but you will not end up with multiple copies of a block on the same
venti server.
Russ
next prev parent reply other threads:[~2006-08-30 20:27 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-29 20:46 John Floren
2006-08-30 4:37 ` Russ Cox
2006-08-30 5:13 ` geoff
2006-08-30 13:42 ` Wes Kussmaul
2006-08-30 15:02 ` Francisco J Ballesteros
2006-08-30 16:01 ` Tharaneedharan Vilwanathan
2006-08-30 16:02 ` William Josephson
2006-08-30 16:12 ` LiteStar numnums
2006-08-30 18:23 ` Francisco J Ballesteros
2006-08-30 21:51 ` Robert Raschke
2006-08-30 20:27 ` Russ Cox [this message]
2006-09-01 6:40 ` Tharaneedharan Vilwanathan
2006-09-01 17:55 ` Russ Cox
2006-09-03 12:53 ` Tharaneedharan Vilwanathan
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