[ZODB-Dev] ZEO cache logging where clietn uses multiple ClientStorages

[Chris Withers]

(cc'ing zodb-dev since peiople there may have ideas)

Guido van Rossum wrote:
>>How about if the client uses more than one ClientStorage via ExternalMounts?
> 
> Yes, that could do it. :-(  

Would http://cvs.zope.org/Products/DBTab/ help with this at all?

> Each ClientStorage instance has its own
> ClientCache.  And since they run in the same process, they share the
> cache tracing filename, but not the cache tracing file object... :-(
> 
> I'm not sure about what to do about this.  Maybe they should share the
> file object; maybe only the first one there should be tracing.

What I'd like to see is the file called 
os.environ['ZEO_CACHE_TRACE']+'-'+storagename, if you see what I mean, that way 
you can get a trace for each mounted storage as appropriate. I think the storage 
name specified in ClientStorage's contructor would be ideal.

In my app, I can imagine the caches needing to be very different sizes, since 
each storage varies in size and number of reads/writes a lot.

Would that be to easy do?

cheers,

Chris