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

[Christian Theune]

Hi,

On Mon, Mar 10, 2008 at 08:28:48PM -0600, Shane Hathaway wrote:
> Christian Theune wrote:
>> Hi,
>> On Mon, Mar 10, 2008 at 05:34:59PM -0500, Kenneth Miller wrote:
>>>> Hello all,
>>>>
>>>>      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?
>> Just to make sure that all of the authors involved with anything here 
>> spoke
>> up, please refer to the other two mails by Gary and Shane. ;)
>
> Heh.
>
> How is the ZEO RAID project going, anyway?  It seems like a good idea and I 
> don't think it actually depends on ZEO, does it?  For example, I wonder if 
> it's possible to create a RAID storage around a set of RelStorage 
> instances.


We have alpha1 out there (see the zope.org repository) with full fail-over and
recover facilities.

We made some changes to the ZODB trunk to clean up some interfaces and make
ZEO support the more elaborate protocol details.

> I got a report from one person who put RelStorage behind a ZEO server. 
> Apparently it works fine, though I haven't tried it myself.  Maybe we're 
> finally reaching the point where we can choose from several ZODB storage 
> components and connect them with ease.

Yes, reaching that stage would be nice.

Christian

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