[Xapian-discuss] Xapian 1.0.18 released

[Jesper Krogh]

Olly Betts wrote:
> On Thu, Mar 11, 2010 at 06:24:00PM +0100, Jesper Krogh wrote:
>> Olly Betts wrote:
>>> I've uploaded Xapian 1.0.18 [...]
>>>
>>> Flint backend:
>>>
>>> * When updating documents, don't update posting entries which haven't changed
>>>   (ticket#250). 
>> In my application a prepare a "new" document, search the index for and
>> existing one and call replace_document with the new document if it
>> should be replaced. If the documents does not differ much, will the
>> optimization apply in this case? Or is it only when doing modifications
>> to existing documents?
> 
> It works for your case too, but for flint the document length is stored with
> every posting entry, so if the document length changes, every posting has
> to be rewritten anyway.  That's equally true for modifying an existing
> document.
> 
> The chert backend in 1.1.x is saner and only stores the document lengths
> once in a separate structure, so it benefits more from this optimisation.

How far is chert from "production ready" = stable?

-- 
Jesper