Aaron Richton wrote:
> OpenLDAP 2.3 requires that you use the transactions patch to BDB
> 4.2.52
Strictly speaking, this isn't true. It's greatly beneficial to run
with Degree 2 isolation, but if sites believe they have a compelling
reason to not use unofficial patches, they don't have to. It's
probably not in their best interest, but who are we to judge? (Until
they start asking openldap-software why their disks fill...)
I have a feeling that the Degree 2 isolation patch is going to become
a FAQ as 2.3 gets adopted. I've tried to summarize under "Which
version of BerkeleyDB should I use?" in the FAQ-O-Matic; revisions
encouraged. Hopefully this will eventually get to be a Google hit for
"BerkeleyDB 4.2.52 library needs TXN patch!"
Thanks for writing that. I've made some updates. Not completely happy
with the focus on "Degree 2 isolation," as that's actually an
independent issue. Really the point is that BDB 4.2 has a bug in its
transaction initialization sequence that is fixed in 4.3, and the patch
we provide for 4.2 is a hack to bypass the bug in one specific use case.
The patch is by no means a general-purpose fix, and it does not provide
Degree 2 isolation for BDB 4.2, and OpenLDAP does not invoke BDB 4.3's
Degree 2 isolation support. I'm not sure the details are important
enough to spell out in the FAQ, but still thinking about it.
--
-- Howard Chu
Chief Architect, Symas Corp. Director, Highland Sun
http://www.symas.com http://highlandsun.com/hyc
Symas: Premier OpenSource Development and Support
