[Zope] ZEO recommended for single-cpu?

2005-06-14 Thread gabor

hi,

i understand that you need to use ZEO when running ZOPE on a multi-cpu 
machine (or when you want to cluster ZOPE).


but from mails on this forum it seems that people are also using ZEO 
when they're running ZOPE on a single-cpu machine.


why?

gabor
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Re: [Zope] ZEO recommended for single-cpu?

2005-06-14 Thread Chris McDonough
Typically it's because:

- Zope starts faster in a ZEO setup.
- You can use zopectl debug to get into a debugger session
  without shutting down Zope first if you use ZEO.

- C


On Tue, 2005-06-14 at 11:03 +0200, gabor wrote:
 hi,
 
 i understand that you need to use ZEO when running ZOPE on a multi-cpu 
 machine (or when you want to cluster ZOPE).
 
 but from mails on this forum it seems that people are also using ZEO 
 when they're running ZOPE on a single-cpu machine.
 
 why?
 
 gabor
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RE: [Zope] ZEO recommended for single-cpu?

2005-06-14 Thread Pascal Peregrina
Also, concerning multi-cpu, I think it's the other way around.

Because python processes only use one CPU, it's useless to run one Zope
instance on a multi-cpu system, as only one CPU will be used.  That's why on
multi-cpu system lots of people run at least Zeo + one instance of Zope (and
often one Zope instance per CPU).

But Zeo is really lightweight, so it's worth trying to use Zeo+Zope on a
single cpu system, to take advantage of what Chris describes below.

Pascal

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of
Chris McDonough
Sent: 14 June 2005 10:46
To: gabor
Cc: zope@zope.org
Subject: Re: [Zope] ZEO recommended for single-cpu?


Typically it's because:

- Zope starts faster in a ZEO setup.
- You can use zopectl debug to get into a debugger session
  without shutting down Zope first if you use ZEO.

- C


On Tue, 2005-06-14 at 11:03 +0200, gabor wrote:
 hi,
 
 i understand that you need to use ZEO when running ZOPE on a multi-cpu 
 machine (or when you want to cluster ZOPE).
 
 but from mails on this forum it seems that people are also using ZEO 
 when they're running ZOPE on a single-cpu machine.
 
 why?
 
 gabor
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Re: [Zope] ZEO recommended for single-cpu?

2005-06-14 Thread Tim Peters
[gabor]
 i understand that you need to use ZEO when running ZOPE on a multi-cpu
 machine (or when you want to cluster ZOPE).
 
 but from mails on this forum it seems that people are also using ZEO
 when they're running ZOPE on a single-cpu machine.

 why?

More here:

http://zope.org/Wikis/ZODB/FileStorageBackup
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