Hi there,
I know it is not easy, but I need some advices to keep our bosses
happy at the planning stage of our application.
The application we are planning is a document management application
which follows documents in a company. Document and version count could
be around 1s, quite frequent
--On 23. Juni 2006 14:27:52 +0200 Adam Groszer <[EMAIL PROTECTED]> wrote:
Hi there,
I know it is not easy, but I need some advices to keep our bosses
happy at the planning stage of our application.
The application we are planning is a document management application
which follows documents i
Roché Compaan wrote:
I love the ZODB, and I am sure that I don't have to explain why, to
anybody on this list. I love it so much that it often clouds my
judgement. Sometimes I really should be using a relational backend but I
don't - the ZODB is just too convenient, and I don't have to complicate
Hi Andreas,
Thank you for your quick answer.
Friday, June 23, 2006, 2:36:56 PM, you wrote:
AJ> --On 23. Juni 2006 14:27:52 +0200 Adam Groszer <[EMAIL PROTECTED]> wrote:
>> Hi there,
>>
>> I know it is not easy, but I need some advices to keep our bosses
>> happy at the planning stage of our ap
--On 23. Juni 2006 16:05:49 +0200 Adam Groszer <[EMAIL PROTECTED]> wrote:
AJ> We run a CMS with several ZEO storages using FileStorage with up 300k
AJ> different objects per storage.
May you mention some or some sites on the internet that run Zope/ZODB
to have some examples?
Since ZODB is
> The ZODB is actually very fast. [...]
>
> So you're probably observing slowness in the frameworks on top of it.
I'll believe this anytime :-]
In our case, a transaction may be a workflow state change on say 50 objects.
Two or three people try a transaction like that within a couple of seconds
Jean Jordaan wrote:
The ZODB is actually very fast. [...]
So you're probably observing slowness in the frameworks on top of it.
I'll believe this anytime :-]
In our case, a transaction may be a workflow state change on say 50 objects.
Two or three people try a transaction like that within a c
--On 23. Juni 2006 17:51:35 +0200 Florent Guillaume <[EMAIL PROTECTED]> wrote:
BTrees perform best when keys' prefixes are randomly distributed.
So if your application generates keys like 'foo001', 'foo002',... you'll
get lots of conflicts. Same for consecutive integers in IOBTree.
hm..
On Fri, 2006-06-23 at 15:11 +0200, Florent Guillaume wrote:
> > I often daydream of a ZODB that will one day have such great performance
> > that it won't be necessary to adopt a hybrid backend. I know there is a
> > huge difference between objects and records in an RDBMS, but in an
> > attempt to
On 23 Jun 2006, at 17:55, Andreas Jung wrote:
--On 23. Juni 2006 17:51:35 +0200 Florent Guillaume <[EMAIL PROTECTED]>
wrote:
BTrees perform best when keys' prefixes are randomly distributed.
So if your application generates keys like 'foo001', 'foo002',...
you'll
get lots of conflicts. Same
Jean Jordaan wrote at 2006-6-23 16:24 +0200:
> ... write conflicts by large transactions ...
>To mitigate this, we want to create a savepoint and then commit more often
>while iterating and changing workflow, rolling back to the savepoint if
>necessary.
I fear this will not work -- at least not wh
Roché Compaan wrote at 2006-6-22 21:53 +0200:
> ...
>What overhead does undo add to performance?
Very few -- apart from a fast growing storage file.
However, the log behaviour of "FileStorage" means that
you get a very different notion of locallity.
In a relational database, records in the same
Adam Groszer wrote at 2006-6-23 14:27 +0200:
> ...
>Some fears they are having and I can't find unambiguous information:
>- Is ZODB a good choice for this app?
It depends...
At least careful design is necessary!
The most problematic aspects of the ZODB are write conflicts.
When two concurrent
On Fri, 2006-06-23 at 21:02 +0200, Dieter Maurer wrote:
> Roché Compaan wrote at 2006-6-22 21:53 +0200:
> > ...
> >What overhead does undo add to performance?
>
> Very few -- apart from a fast growing storage file.
>
> However, the log behaviour of "FileStorage" means that
> you get a very differ
On Fri, 2006-06-23 at 22:03 +0200, Dieter Maurer wrote:
> Adam Groszer wrote at 2006-6-23 14:27 +0200:
> > ...
> >Some fears they are having and I can't find unambiguous information:
> >- Is ZODB a good choice for this app?
>
> It depends...
> At least careful design is necessary!
>
> The most pr
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