Re: fsync-pgdata-on-recovery tries to write to more files than previously

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Abhijit Menon-Sen <ams(at)2ndQuadrant(dot)com>
Cc: Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Christoph Berg <myon(at)debian(dot)org>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: fsync-pgdata-on-recovery tries to write to more files than previously
Date: 2015-05-28 03:41:29
Message-ID: 20950.1432784489@sss.pgh.pa.us
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Abhijit Menon-Sen <ams(at)2ndQuadrant(dot)com> writes:
> At 2015-05-27 20:22:18 -0400, tgl(at)sss(dot)pgh(dot)pa(dot)us wrote:
>> I doubt that that (not using AllocateDir) []

> (Disregarding per your followup.)

>> What I think is a reasonable compromise is to treat AllocateDir
>> failure as nonfatal, but to continue using ReadDir etc which means
>> that any post-open failure in reading a successfully-opened directory
>> would be fatal.

> OK, that's halfway between the two patches I posted. Will do.

Thought you were disregarding?

Anyway, I had an idea about reducing the ugliness. What you basically
did is copy-and-paste ReadDir so you could change the elevel. What
about turning ReadDir into a wrapper around a ReadDirExtended function
that adds an elevel argument?

regards, tom lane

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