[ZDP] BackTalk to Document The Zope Book (2.6 Edition)/Scalability and ZEO

webmaster at zope.org webmaster at zope.org
Tue Mar 30 18:05:16 EST 2004

A comment to the paragraph below was recently added via http://zope.org/Documentation/Books/ZopeBook/2_6Edition/ZEO.stx#2-5


    A ZEO-configured Zope installation has the capability to serve
    large numbers of requests in short periods of time.  If your site
    is only moderately trafficked and you get no complaints about the
    responsiveness of the site, you probably don't need ZEO.  You may
    need ZEO if:

      o You've got a single Zope server in production which cannot
        service application demand within a reasonable amount of time.
        Zope is a high-performance system, and one Zope can handle
        millions of hits per day, but there are upper bounds on the
        capacity of a single Zope server.  ZEO allows you to scale
        your site by adding more hardware on which you may place extra
        Zope servers to handle excess demand.

      o Your site is critical and requires 24/7 uptime.  Using ZEO can
        help you add redundancy to your server configuration.

      o You want to distribute your site to disparate geographic
        locations in order to increase response time to remote sites.
        ZEO allows you to place Zope servers which use the same ZODB
        in separate geographic locations.

      o You want to "debug" an application which is currently served
        by a single Zope server from another Zope process.  This is a
        advanced technique useful to Python developers, but is not
        covered in this book.

      % Anonymous User - Mar. 30, 2004 6:05 pm:
       this is my test comment

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