| From: | David Steele <david(at)pgmasters(dot)net> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Noah Misch <noah(at)leadboat(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Suraj Kharage <suraj(dot)kharage(at)enterprisedb(dot)com>, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, Rajkumar Raghuwanshi <rajkumar(dot)raghuwanshi(at)enterprisedb(dot)com>, Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com>, Tels <nospam-pg-abuse(at)bloodgate(dot)com>, Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Jeevan Chalke <jeevan(dot)chalke(at)enterprisedb(dot)com>, vignesh C <vignesh21(at)gmail(dot)com> |
| Subject: | Re: backup manifests |
| Date: | 2020-03-30 01:23:06 |
| Message-ID: | ddbb128b-86e5-7ffb-b5dc-15a414dfde0e@pgmasters.net |
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| Lists: | pgsql-hackers |
On 3/29/20 9:07 PM, Andres Freund wrote:
> On 2020-03-29 20:42:35 -0400, Robert Haas wrote:
>>> What do you think of having the verification process also call pg_waldump to
>>> validate the WAL CRCs (shown upthread)? That looked helpful and simple.
>>
>> I don't love calls to external binaries, but I think the thing that
>> really bothers me is that pg_waldump is practically bound to terminate
>> with an error, because the last WAL segment will end with a partial
>> record.
>
> I don't think that's the case here. You should know the last required
> record, which should allow to specify the precise end for pg_waldump. If
> it errors out reading to that point, we'd be in trouble.
Exactly. All WAL generated during the backup should read fine with
pg_waldump or there is a problem.
--
-David
david(at)pgmasters(dot)net
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