Re: [GENERAL] cleaning wal files from postgres
oops, sorry, my question was very ambiguous ... What I want to know is: The correct procedure to remove the wal files that have been used in the recovery of a postgres server. Consider the following; 1.- A main server in production. 2.- A secondary server that is normally off. 3.- By connecting the secondary server, the primary server must copy the directory data as well as wal files generated during the copying process. 4.- start up the postgres on the secondary server. 5o.Delete wal files no longer will be used by postgres to save disk space. how can i know which wal file is not required by postgres and delete wal files from main and secondary server, to save space disk on the servers ? (after a succesfully start up on secondary server) regards eddie. On 05/21/2010 03:43 PM, Andreas Schmitz wrote: maybe I don't understand the problem. there is no need to clean WAL files after recovery. where exactly is the problem ? regards andreas erobles wrote: PITR recovery On 05/21/2010 03:04 PM, Andreas Schmitz wrote: erobles wrote: which is the right procedure to clean wal files after a recovery ?? what kind of recovery ? regards andreas -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] cleaning wal files from postgres
Hello. When you execute pg_stop_backup,postgresql makes a special file, like this 00010015.0064.backup. This means you can delete wal 00010014 and before. The PostgreSQL manual also says following. http://www.postgresql.org/docs/8.4/interactive/continuous-archiving.html#BACKUP-ARCHIVING-WAL 24.3.2. Making a Base Backup To make use of the backup, you will need to keep around all the WAL segment files generated during and after the file system backup. To aid you in doing this, the pg_stop_backup function creates a backup history file that is immediately stored into the WAL archive area. This file is named after the first WAL segment file that you need to have to make use of the backup. For example, if the starting WAL file is 0001123455CD the backup history file will be named something like 0001123455CD.007C9330.backup. (The second part of the file name stands for an exact position within the WAL file, and can ordinarily be ignored.) Once you have safely archived the file system backup and the WAL segment files used during the backup (as specified in the backup history file), all archived WAL segments with names numerically less are no longer needed to recover the file system backup and can be deleted. However, you should consider keeping several backup sets to be absolutely certain that you can recover your data. Thank you. oops, sorry, my question was very ambiguous ... What I want to know is: The correct procedure to remove the wal files that have been used in the recovery of a postgres server. Consider the following; 1.- A main server in production. 2.- A secondary server that is normally off. 3.- By connecting the secondary server, the primary server must copy the directory data as well as wal files generated during the copying process. 4.- start up the postgres on the secondary server. 5o.Delete wal files no longer will be used by postgres to save disk space. how can i know which wal file is not required by postgres and delete wal files from main and secondary server, to save space disk on the servers ? (after a succesfully start up on secondary server) regards eddie. On 05/21/2010 03:43 PM, Andreas Schmitz wrote: maybe I don't understand the problem. there is no need to clean WAL files after recovery. where exactly is the problem ? regards andreas erobles wrote: PITR recovery On 05/21/2010 03:04 PM, Andreas Schmitz wrote: erobles wrote: which is the right procedure to clean wal files after a recovery ?? what kind of recovery ? regards andreas -- Kenichiro Tanaka K.K.Ashisuto http://www.ashisuto.co.jp/english/index.html -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] cleaning wal files from postgres
erobles wrote: which is the right procedure to clean wal files after a recovery ?? which kind of recovery ? PITR or just a crash ? -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] cleaning wal files from postgres
erobles wrote: which is the right procedure to clean wal files after a recovery ?? what kind of recovery ? regards andreas -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] cleaning wal files from postgres
PITR recovery On 05/21/2010 03:04 PM, Andreas Schmitz wrote: erobles wrote: which is the right procedure to clean wal files after a recovery ?? what kind of recovery ? regards andreas -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] cleaning wal files from postgres
maybe I don't understand the problem. there is no need to clean WAL files after recovery. where exactly is the problem ? regards andreas erobles wrote: PITR recovery On 05/21/2010 03:04 PM, Andreas Schmitz wrote: erobles wrote: which is the right procedure to clean wal files after a recovery ?? what kind of recovery ? regards andreas -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
