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Re: delta-syncrepl missing changes

To: Francis Swasey <Frank.Swasey@uvm.edu>
Subject: Re: delta-syncrepl missing changes
From: Quanah Gibson-Mount <quanah@zimbra.com>
Date: Mon, 09 Mar 2009 11:57:46 -0700
Cc: OpenLDAP-Software@openldap.org
Content-disposition: inline
In-reply-to: <49B11753.2000605@uvm.edu>
References: <49831294.1040508@uvm.edu> <102CEF6B4E15BF3FC77B510E@[192.168.1.199]> <499C17DF.2060204@uvm.edu> <499C214B.5020308@uvm.edu> <9B489794211A536621AB6B44@[192.168.1.199]> <499C5995.4070002@uvm.edu> <499D5316.5010909@uvm.edu> <499DB3B9.1070702@uvm.edu> <49AD74FB.7090309@uvm.edu> <49AD89F3.4080806@symas.com> <49AE77BF.6000406@uvm.edu> <49AED568.4080709@stroeder.com> <4DD8A1231798B1A74924ADA5@[192.168.1.199]> <49AF398C.9060300@uvm.edu> <49B11753.2000605@uvm.edu>

--On Friday, March 06, 2009 7:30 AM -0500 Francis Swasey <Frank.Swasey@uvm.edu> wrote:

This hypothesis has been confirmed with the modifications that didn't
make it to the replicas yesterday morning and this morning.

Looks like the race conditions in accesslog/syncrepl that are being
worked on in the ITS's against 2.4 were present in the later 2.3 systems
as well.

I'm not sure what race conditions you're referring to here. Using accesslog serializes writes, therefore you can't hit the race conditions about updating the CSN that are being worked on in current RE24.

I'll note that my 2.3.43 builds are actually a hybrid with some 2.4 code. I don't believe there's anything accesslog specific in it, but there is some connection code reworking that is a part of it (the lightweight dispatcher from 2.4, most notably). I've yet to see this with any of our deployments and some of them are quite large and extremely busy.

--Quanah

--

Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra ::  the leader in open source messaging and collaboration

Follow-Ups:
- Re: delta-syncrepl missing changes
  - From: Francis Swasey <Frank.Swasey@uvm.edu>

References:
- Re: delta-syncrepl missing changes
  - From: Francis Swasey <Frank.Swasey@uvm.edu>
- Re: delta-syncrepl missing changes
  - From: Howard Chu <hyc@symas.com>
- Re: delta-syncrepl missing changes
  - From: Francis Swasey <Frank.Swasey@uvm.edu>
- Re: delta-syncrepl missing changes
  - From: Michael Ströder <michael@stroeder.com>
- Re: delta-syncrepl missing changes
  - From: Quanah Gibson-Mount <quanah@zimbra.com>
- Re: delta-syncrepl missing changes
  - From: Francis Swasey <Frank.Swasey@uvm.edu>
- Re: delta-syncrepl missing changes
  - From: Francis Swasey <Frank.Swasey@uvm.edu>

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