Re: Controlling hot standby
От | Simon Riggs |
---|---|
Тема | Re: Controlling hot standby |
Дата | |
Msg-id | 1232737095.2327.1276.camel@ebony.2ndQuadrant обсуждение исходный текст |
Ответ на | Re: Controlling hot standby ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>) |
Список | pgsql-hackers |
On Fri, 2009-01-23 at 12:17 -0600, Kevin Grittner wrote: > >>> Simon Riggs <simon@2ndQuadrant.com> wrote: > > There are considerable benefits to having it turned on during PITR > > > > Please read this to see why > > > http://wiki.postgresql.org/wiki/Hot_Standby#Dynamic_Control_of_Recovery > > Am I reading this right? What I get out of it is that users can > connect to the database during recovery, like with psql or JDBC? Any > user can query recovery completion status and progress, while a > superuser can also step through transactions in various ways? Can the > data in the database be queried while recovery is paused? That's a big Yes to all of that. Exactly what all this is for. > If I'm understanding this, and data can be queried during a pause, I > can certainly see use cases for this; but it might be important to be > able to start the recovery in a paused state to avoid going too far in > the transaction stream before a connection can be established and > recovery paused. OK, that's a simple addition. Thanks for the suggestion. I'll make it pause just after it changes state, so you can connect and tell it to progress as far as you like. -- Simon Riggs www.2ndQuadrant.comPostgreSQL Training, Services and Support
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