[ZODB-Dev] polite advice request

[Christian Tismer]

Ah, danke mabe ;-)

On 18.08.13 19:56, Jim Fulton wrote:
> On Sun, Aug 18, 2013 at 1:40 PM, [mabe] <public at enkore.de> wrote:
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>> He meant prescription.
>>
>> In german Rezept is the word for both prescription and recipe (like in
>> cooking). Easy to confuse for us germans in english :)
> Great.  Now I don't know what he meant by prescription. :) Does it
> matter?  Might it as easily be foos and bars?
>
> Christian,
>
> Are you saying that you might need to access items
> from an old database that aren't in the current snapshot?

Yes, prescription, sorry.
Yes, we need to look into different versions of the
continuously actualized data base. Like I did it now this creates
a slightly different, read-only data base every two weeks. Not that big deal
after I built the first DB today, we can probably live with < 300 MB
of database each version. (using zlibstorage)
It is just my optimizer brain, and the fact that the whole history of 
the stuff
since 2012-01-01 fits into 125 MB of ZIP files, as delta-updates.

There must be a solution that utilizes this incremental update stuff nicely.
I wanted to use a versioned variant of btree, until I found out that even
the table lauout changed a bit three times, which creates a huge update.

cheers - chris

p.s.:
I needed to patch zlibstorage for Python 3.
Where can I put a pull request?

> Jim
>
>
>> On 08/18/2013 06:34 PM, Jim Fulton wrote:
>>> On Sun, Aug 18, 2013 at 12:17 PM, Christian Tismer
>>> <tismer at stackless.com> wrote:
>>>> We need to cope with millions of recipes that come from certain
>>>> dates and therefore need to inquire different versions of the
>>>> database.
>>> I don't understand this. What's a "recipe"?  Why do you need to
>>> consider old versions of the database?
>>
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>


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