Coda File System

Re: weakly connected reintegration

From: Jan Harkes <>
Date: Mon, 29 Jan 2001 04:48:03 -0500
On Mon, Jan 29, 2001 at 10:32:24AM +0100, Petr Tuma wrote:
> Hello,
> > There is reintegration, when a client sends a batch of operation to the
> > servers. And resolution where servers try to make sure their copies of
> > the data are in sync. Resolution is triggered by a client who detects
> > the differences in the version vectors when accessing the object.
> > On slow links there is the `weak-reintegration' where a client
> > reintegrates only with one server in the replicated group and then
> > immediately triggers resolution on the affected objects.
> Do I understand it correctly that weak reintegration presents little 
> speedup on slow link then ? Because if resolution is triggered 
> immediately after reintegration to one server and the volume gets 
> locked, then the client still has to wait until all servers catch up ?
> Petr Tuma

It helps a lot when the servers are all on the same local network. F.i.
compare the cost of sending the same data to 3 servers on a 28k8 modem
connection to sending the data only once and having the servers perform
resolution over the local 100Base-T ethernet.

Received on 2001-01-29 04:48:08