Tres Seaver wrote:
> Shane Hathaway wrote:
>> However, I think we can still take advantage of listen and notify in a
>> slightly different way. Currently, the Postgres adapter rolls back the
>> load transaction on every connection close, but if it instead leaves the
>> session idle with a transact
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Shane Hathaway wrote:
> Tres Seaver wrote:
>> I've got a question for you on the removal of the LISTEN / NOTIFY stuff
>> in the Postgresql adapter: it looks to me as though your code was not
>> doing the async check-for-notifies as shown in the 'notif
Dieter Maurer wrote:
> Shane Hathaway wrote at 2008-1-31 11:55 -0700:
>> ...
>> Yes, quite right!
>>
>> However, we don't necessarily have to roll back the Postgres transaction
>> on every ZODB.Connection close, as we're doing now.
>
> That sounds very nasty!
>
> In Zope, I definitely *WANT* to e
Shane Hathaway wrote at 2008-1-31 11:55 -0700:
> ...
>Yes, quite right!
>
>However, we don't necessarily have to roll back the Postgres transaction
>on every ZODB.Connection close, as we're doing now.
That sounds very nasty!
In Zope, I definitely *WANT* to either commit or roll back the
transacti
Shane Hathaway wrote at 2008-1-31 11:35 -0700:
>Dieter Maurer wrote:
>> Shane Hathaway wrote at 2008-1-31 00:12 -0700:
>>> ...
>>> 1. Download ZODB and patch it with poll-invalidation-1-zodb-3-8-0.patch
>>
>> What does "poll invalidation" mean?
>>
>> The RelStorage maintains a sequence of (obje
Dieter Maurer wrote:
> I am surprised that you think to be able to play with the polling
> frequency.
>
> Postgres will deliver objects as they have been when the
> transaction started.
> Therefore, when you start a postgres transaction
> you must invalidate any object in your cache that
>
Dieter Maurer wrote:
> Shane Hathaway wrote at 2008-1-31 00:12 -0700:
>> ...
>> 1. Download ZODB and patch it with poll-invalidation-1-zodb-3-8-0.patch
>
> What does "poll invalidation" mean?
>
> The RelStorage maintains a sequence of (object) invalidations ordered
> by "transaction-id" and t
Shane Hathaway wrote at 2008-1-31 01:08 -0700:
> ...
>I admit that polling for invalidations probably limits scalability, but
>I have not yet found a better way to match ZODB with relational
>databases. Polling in both PostgreSQL and Oracle appears to cause no
>delays right now, but if the poll
Tres Seaver wrote:
> I've got a question for you on the removal of the LISTEN / NOTIFY stuff
> in the Postgresql adapter: it looks to me as though your code was not
> doing the async check-for-notifies as shown in the 'notify.py' in the
> psycopg2 examples:
>
> http://www.initd.org/tracker/psycop
Shane Hathaway wrote at 2008-1-31 00:12 -0700:
> ...
>1. Download ZODB and patch it with poll-invalidation-1-zodb-3-8-0.patch
What does "poll invalidation" mean?
The RelStorage maintains a sequence of (object) invalidations ordered
by "transaction-id" and the client can ask "give me all inval
Christian Theune wrote at 2008-1-30 21:21 +0100:
> ...
>That would mean that the write skew phenomenon that you found would be
>valid behaviour, wouldn't it?
No.
> Am I missing something?
Yes. No matter how you order the two transactions in my example,
the result will be different from what the
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Shane Hathaway wrote:
> Hi all,
>
> RelStorage now exists in the Zope subversion repository here:
>
>http://svn.zope.org/relstorage/trunk/
>
> I have also created a wiki page:
>
>http://wiki.zope.org/ZODB/RelStorage
>
> Testing help and da
On Jan 31, 2008, at 3:08 AM, Shane Hathaway wrote:
Jim Fulton wrote:
On Jan 27, 2008, at 3:11 AM, Shane Hathaway wrote:
I hope the patch, or a modified version of the patch, will be
accepted for inclusion in ZODB 3.9. A monkey patch version is
possible, but I'm trying to avoid that.
I'm t
Ok, great. Woo hoo - 64 bit 2.5. Many thanks Shane.
Regards,
David
Shane Hathaway wrote:
David Pratt wrote:
Hi Shane. Congratulations. Can you advise of compatibility with ZODB
3.8. Many thanks.
Yes, it's fully compatible now. A few tests didn't pass at first, but
they only failed due to t
Jim Fulton wrote:
On Jan 27, 2008, at 3:11 AM, Shane Hathaway wrote:
I hope the patch, or a modified version of the patch, will be accepted
for inclusion in ZODB 3.9. A monkey patch version is possible, but
I'm trying to avoid that.
I'm tentatively planning on including it in 3.9. I need
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