>> I believe if WAL files are proper as mentioned in Alvaro's mail, the purposed logic should generate >> correct values. >> Do you see any problem in logic purposed in my original mail. >> Can I resume my work on this feature?
> Maybe I'm missing your point, but... why don't you just use PITR to > recover from the corruption of pg_control? AFAIK PITR can be used in a scenario where there is a base back-up and we have archived the WAL files after that, now it can use WAL files to apply on base-backup. In this scenario we don't know a point from where to start the next replay. So I believe it will be difficult to use PITR in this scenario. -----Original Message----- From: Fujii Masao [mailto:masao.fu...@gmail.com] Sent: Tuesday, June 19, 2012 7:44 PM To: Amit Kapila Cc: Tom Lane; Alvaro Herrera; Cédric Villemain; Pg Hackers; Robert Haas Subject: Re: [HACKERS] Allow WAL information to recover corrupted pg_controldata On Tue, Jun 19, 2012 at 2:44 AM, Amit Kapila <amit.kap...@huawei.com> wrote: >> AFAIR you can create pg_control from scratch already with pg_resetxlog. >> The hard part is coming up with values for the counters, such as the >> next WAL location. Some of them such as next OID are pretty harmless >> if you don't guess right, but I'm worried that wrong next WAL could >> make things worse not better. > > I believe if WAL files are proper as mentioned in Alvaro's mail, the purposed logic should generate > correct values. > Do you see any problem in logic purposed in my original mail. > Can I resume my work on this feature? Maybe I'm missing your point, but... why don't you just use PITR to recover from the corruption of pg_control? Regards, -- Fujii Masao -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers