[ZODB-Dev] what could cause this kind of cache corruption?

[Jim Fulton]

On Aug 11, 2008, at 10:05 AM, Christian Theune wrote:

> Hi,
>
> On Mon, 2008-08-11 at 09:37 -0400, Jim Fulton wrote:
>> On Aug 3, 2008, at 4:03 AM, Christian Theune wrote:
>>
>>> On Fri, 2008-08-01 at 09:21 -0400, Jim Fulton wrote:
>>>> On Jul 31, 2008, at 1:53 PM, Chris Withers wrote:
>>>>> What I'd *really* like is a stable zodb release with Christian's
>>>>> patches for zeoraid and Shane's patches for RelStorage that then
>>>>> feeds through into a stable release of Zope 2.
>>>>
>>>>
>>>> I'm not familiar with Christians patches. If they are bug fixes,  
>>>> they
>>>> could make it into 3.8.  I plan to include Shane's patches in 3.9.
>>>> I'm
>>>> not sure when there will be a stable release of 3.9.
>>>
>>> My patches aren't bug fixes and the plan was never to include them  
>>> to
>>> ZODB 3.8.
>>>
>>> However, I was hoping for inclusion of at least the
>>> `storage-iterator-branch` in 3.9 and I asked a few times over the  
>>> past
>>> months already for review but haven't gotten any responses at all so
>>> far. This branch has been used in production for a few month  
>>> already.
>>
>> I haven' t had time to review this yet.  I'll get to it eventually.
>> I'm sure I'll get to it before 3.9 is released.
>
> \o/
>
>>> In addition there's the `bushy-directory` branch which introduces a
>>> new
>>> blob directory structure to avoid scalability issues with  
>>> filesystems
>>> like ext2/3 that only accept limited numbers of entries in a
>>> directory.
>>
>> Hm, this sounds like a bug fix if it prevents failures.
>
> It is. We ran into a failure on a production system that ran ext(2|3).

It sounds like this (or some form of it) should go into 3.8.x.

>>> This branch is being used in production but needs a little which
>>> should
>>> happen in the next days. (The packing is reported to block.)
>>
>> Is the packing blockage unique to this branch?
>
> Blocking currently happens on both trunk and 3.8.

So this should get into a 3.8.x release.


>>> At last there's a small `ctheune-betterimport` branch which fixes  
>>> ZEXP
>>> import for weakref objects and has been sitting around for almost a
>>> year
>>> now too.
>>
>>
>> Is this a bug fix for 3.8? Or a feature for 3.9?
>
> I can't remember when 3.8 came out. Back than it was a feature. OTOH  
> you
> could call it a bugfix because you could create ZEXP files that could
> never be imported again.


So a candidate for a 3.8 release.

Jim

--
Jim Fulton
Zope Corporation