Re: Sync Rep: First Thoughts on Code
От | Jeff Davis |
---|---|
Тема | Re: Sync Rep: First Thoughts on Code |
Дата | |
Msg-id | 1229225593.25502.63.camel@jdavis обсуждение исходный текст |
Ответ на | Re: Sync Rep: First Thoughts on Code ("Robert Haas" <robertmhaas@gmail.com>) |
Список | pgsql-hackers |
On Sat, 2008-12-13 at 22:23 -0500, Robert Haas wrote: > > If it's guaranteed to be visible on the standby after it's committed on > > the master, and you don't have any way to make it actually simultaneous, > > then that implies that it's visible on the slave for some brief period > > of time before it's committed on the master. > > > > That situation is still asymmetric, so why is that a better use of the > > term "synchronous"? > > Because that happens anyway. If I request a commit on a single, > unreplicated server, the server makes the commit visible to new > transactions and then sends me a message informing me that the commit > has completed. Since the message takes some finite time to reach me, > there is a window of time after the commit has completed and before I > know that the commit has been completed. > Oh, I see the distinction now. Thanks for the detailed reply. Regards,Jeff Davis
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