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From: Kyotaro Horiguchi <[email protected]>
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Subject: Re: In-placre persistance change of a relation
Date: Thu, 25 Mar 2021 14:08:05 +0900 (JST)
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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(I'm not sure when the subject was broken..)

At Thu, 14 Jan 2021 17:32:17 +0900 (JST), Kyotaro Horiguchi <[email protected]> wrote in 
> Commit bea449c635 conflicts with this on the change of the definition
> of DropRelFileNodeBuffers. The change simplified this patch by a bit:p

In this version, I got rid of the "CLEANUP FORK"s, and added a new
system "Smgr marks".  The mark files have the name of the
corresponding fork file followed by ".u" (which means Uncommitted.).
"Uncommited"-marked main fork means the same as the CLEANUP2_FORKNUM
and uncommitted-marked init fork means the same as the CLEANUP_FORKNUM
in the previous version.x

I noticed that the previous version of the patch still leaves an
orphan main fork file after "BEGIN; CREATE TABLE x; ROLLBACK; (crash
before checkpoint)" since the "mark" file (or CLEANUP2_FORKNUM) is
revmoed at rollback.  In this version the responsibility to remove the
mark files is moved to SyncPostCheckpoint, where main fork files are
actually removed.

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center

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