Streaming-only Remastering
От | Joshua Berkus |
---|---|
Тема | Streaming-only Remastering |
Дата | |
Msg-id | 228921500.3236.1339354079690.JavaMail.root@agliodbs.com обсуждение исходный текст |
Ответы |
Re: Streaming-only Remastering
Re: Streaming-only Remastering Re: Streaming-only Remastering |
Список | pgsql-hackers |
So currently we have a major limitation in binary replication, where it is not possible to "remaster" your system (that is,designate the most caught-up standby as the new master) based on streaming replication only. This is a major limitationbecause the requirement to copy physical logs over scp (or similar methods), manage and expire them more than doublesthe administrative overhead of managing replication. This becomes even more of a problem if you're doing cascadingreplication. Therefore I think this is a high priority for 9.3. As far as I can tell, the change required for remastering over streaming is relatively small; we just need to add a new recordtype to the streaming protocol, and then start writing the timeline change to that. Are there other steps requiredwhich I'm not seeing? -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com San Francisco
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