Re: Possible transaction issue with LMDB
William Brown wrote:
On Fri, 2018-08-17 at 07:06 +0100, Howard Chu wrote:
>> I'm quite aware that it is COW - this issue is specific to COW
>> trees.
>> Transactions must be removed in order, they can not be removed out
>> of
>> order. It is about how pages are reclaimed for the freelist
>
> Incorrect.
We may have to "agree to disagree" then.
Pure, utter nonsense. You're simply wrong, and at this point you're spewing FUD.
Leonid is one of the sharpest code reviewers around, and also one of the most
accurate critics of this code, and even he agrees that there's no issue here.
This function guarantees that the oldest outstanding read txn is protected,
regardless of txn commit order:
http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=librarie...
The source code doesn't lie, but for some reason you are. Either that or
you're using some broken knockoff that claims to be LMDB but isn't.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/