Skip site navigation (1) Skip section navigation (2)

Re: Block-level CRC checks

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Cc: "Heikki Linnakangas" <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "Brian Hurt" <bhurt(at)janestcapital(dot)com>, "Pg Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block-level CRC checks
Date: 2008-10-02 15:37:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
"Jonah H. Harris" <jonah(dot)harris(at)gmail(dot)com> writes:
> Just to see where to go from here... I want to make sure the options
> I've seen in this thread are laid out clearly:

> 1. Hold an exclusive lock on the buffer during the call to smgrwrite
> OR
> 2. Doublebuffer the write
> OR
> 3. Do some crufty magic to ignore hint-bit updates

Right, I think everyone agrees now that #2 seems like the most
preferable option for writing the checksum.  However, that still
leaves us lacking a solution for torn pages during a write that
follows a hint bit update.  We may end up with some "crufty
magic" anyway for dealing with that.

			regards, tom lane

In response to


pgsql-hackers by date

Next:From: Alvaro HerreraDate: 2008-10-02 15:40:22
Subject: Re: Transactions within a function body
Previous:From: Robert TreatDate: 2008-10-02 15:32:16
Subject: Re: FSM rewrite committed, loose ends

Privacy Policy | About PostgreSQL
Copyright © 1996-2018 The PostgreSQL Global Development Group