[ZODB-Dev] Zeo Server as a single point of failure

[Shane Hathaway]

Kenneth Miller wrote:
>      I'm currently developing my application ontop of zodb/zeo, and  
> the idea of having the Zeo server the only single point of failure  
> still bothers me. My question is, has anyone thought of any  
> solutions for this. My idea was to have a few or more background  
> processes that kept multiple servers synced and concurrent. Any  
> thoughts?

1. If you use RelStorage instead of ZEO, you should be able to use 
database-specific replication capabilities. 
http://wiki.zope.org/ZODB/RelStorage

2. Zope Corporation sells ZRS, which provides master/slave replication 
for ZEO. 
http://www.zope.com/zopecom/products/zope_replication_services.html

3. Christian Theune has been working on an interesting solution called 
ZEO RAID.  http://pypi.python.org/pypi/gocept.zeoraid

Shane