Thread: How to auto swtich the roles of primary and standby
hi all my architecture follows as: Master/Slave with Streaming Replication and pgpool-II version of pgpool-II is pgpool-II.3.0.4 version of PostgreSQL is 9.0.2 http://postgresql.1045698.n5.nabble.com/file/n4546630/pgpool-II.png I want to confirm some questions as follows: 1.how about the performance of the architecture ,about what params should I pay most attention to 2.when the primary server goes down , pgpool will execute the command :failover_command and then the standby server becomes the new primary,this is no problem, but when I restart former primary ,what should pgpool do to change the former primary server to new standby ,any command like failover_command to execute? the content of http://www.postgresql.org/docs/9.1/static/warm-standby-failover.html say should recreate the new standby ,but I have no idea about this , could pgpool-II manage the process ,I also find the command failback_command(command to execute when attaching a new node) at pgpool.conf ,I am not sure this command can do something correctly to change the former primary to new standby the question most like http://postgresql.1045698.n5.nabble.com/Switchover-of-Master-and-Slave-roles-td4462251.html thanks for any help jenopob -- View this message in context: http://postgresql.1045698.n5.nabble.com/How-to-auto-swtich-the-roles-of-primary-and-standby-tp4546630p4546630.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com.
Hi All, I am using postgres 9.0 with streaming replication(master/standby). I want to use pacemaker/corosync to create trigger file to indicate the standby to take over. ho can I execute a script using pacemaker whenever a failure happens. Regards, Sanjay Rao
hi you could use pgpool-II failover_command to trigger the script what you want to something you can take at http://pgpool.projects.postgresql.org/pgpool-II/doc/pgpool-en.html and pgpool-II works in Master/Slave Mode will meet your requirements best regards jenopob -- View this message in context: http://postgresql.1045698.n5.nabble.com/How-to-auto-swtich-the-roles-of-primary-and-standby-tp4546630p4584948.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com.
Hi there, i have the exact same problem. Did you find a solution for this ? thanks, Adrian Videanu -- View this message in context: http://postgresql.1045698.n5.nabble.com/How-to-auto-swtich-the-roles-of-primary-and-standby-tp4546630p5645680.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com.
| so, just to make sure that i understand: after the master failed, the slave become the new master, the you have changed postgresql.conf from master to slave and viceversa and restarted the old master as slave ? --- On Thu, 4/19/12, jenopob [via PostgreSQL] <[hidden email]> wrote:
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View this message in context: Re:Re: How to auto swtich the roles of primary and standby
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hi
we did a new shell script named recovery_config_chage.sh at standby server.
the script I wanted to change the fail down postgres master config ,let it start as standby server
and build the communication with the former standby now is master server,then started it by remotestart.sh
the above hopes to help you something
Hi there,
i have the exact same problem. Did you find a solution for this ?
thanks,
Adrian VideanuIf you reply to this email, your message will be added to the discussion below:http://postgresql.1045698.n5.nabble.com/How-to-auto-swtich-the-roles-of-primary-and-standby-tp4546630p5645680.html
View this message in context: Re:Re: How to auto swtich the roles of primary and standby
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| hi, i tried the exact setup that you described here, but unfortunately i had to restart the new master(former slave) in order to get the new settings and this will conduct to a downtime and service interruption. anyway thanks for sharing your experience. Adrian Videanu --- On Fri, 4/20/12, jenopob [via PostgreSQL] <[hidden email]> wrote:
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