[ZWeb] ratings redux

Paul Everitt paul@zope.com
Mon, 11 Mar 2002 16:56:53 -0500

Shane and I discussed a few months ago a strategy that would make a hit 
counter not so problematic.  It basically involved putting the writes 
into a queue and having the data structure only written once every N 
minutes.  If you design it well for ZEO, avoiding hot spots, etc., then 
I think it can work.

If you could keep the writes down to under 50Kb of data a day or so, 
most people could live with that.


Kapil Thangavelu wrote:
> --- Paul Everitt <paul@zope.com> wrote:
>>How related is this implementation strategy to one
>>for hit counters? 
>>The username as the key obviously would help much
> ugh.. i don't think i read this correctly the last
> time, a hit counter in the zodb, is still a bad idea.
> a download counter utilizing a btree length would be
> more effective. a hit counter would be bad, mainly
> because of size bloat in an undoable storage, and (i'm
> less sure on this one) from triggering a write
> transaction on page views which in zeo setting isn't a
> good idea. my current understanding is that in zeo1.0,
> only 1 transaction is allowed active at anyone time
> among all the zeo clients.
> kapil
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