[Zope] Zeo as a Zeo Client

[Gerhard Schmidt]

On Tue, May 02, 2006 at 08:51:12AM +0200, Andreas Jung wrote:
> 
> 
> --On 2. Mai 2006 08:31:17 +0200 Gerhard Schmidt <estartu at ze.tum.de> wrote:
> 
> >Hallo,
> >
> >I am trying to install a setup like shown below
> >
> >ZEO_M
> > | -- ZEO_B
> > |     | -- ZOPE
> > |     | -- ZOPE
> > |     | -- ZOPE
> > |     ...
> > | -- ZOPE
> > | -- ZOPE
> > ...
> >
> 
> You are trying to create a cascade of multiple ZEO Clients? That looks
> very odd. Usually a ZEO client talks directly to a ZEO server.

I try to reduce the load of the line between the backup Computing Center 
and the Mainsite by having a zeo server as Proxy between the zope server 
at the backup site an the ZEO at the main site. 

Secound part is that the zeo at the backupsite can easily reconfigured in 
a normal ZEO when the mainsite is offline. So I don't have to reconfigure 
all zeoclients at the backupsite. The Data.fs is copied  every hour to the 
backup site so that a have an up to one our backup of the data.fs in case 
of a desaster at the main site. 

A configuration like that is described in the Zope Book on page 230. 

Besides I have found that with a growing number of zeo clients the Zeo 
server gets slower but neither the CPU nor the Harddisk IO is at the limit. 
We have a load of 0.2 to 0.3 and disk IO arrond 2-3 MB/sec. We have 12 
zeoclients at the moment and 12 more are planed for the backup site. 

Regards 
Estartu
	
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Gerhard Schmidt    | Nick : estartu      IRC : Estartu  |
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