From: 坂田 哲夫 <sak...@la...> - 2012-08-10 09:32:49
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Dear folks, I'm involved in HA facility implementation for Postgres-XC. This work began lecenty by a separate team from Postgres-XC core, say, XC HA team. We're planning to release this facility as an open source software by the end of this calendar year. The Postgres-XC HA facility will be developed in two phases: Phase1: Furnish fundamental functionality to give 1) redundancy to XC core component based on streaming replication which makes transactional data in datanode durable, and 2) backup GTM with GTM stand-by to handle GTM failure. Basic feature of 1) will be taken from PostgreSQL work and 2) will be taken from Postgres-XC core feature respectively. Phase2: Integrate Postgres-XC and Linux-HA. When one of the Postgres-XC components fails, it will be failed over automatically to continue Postgres-XC operation. For this purpose, XC HA team is developing RAs (Resource Agents). RA for coordinator and datanode will be implemented first, and then for GTM. XC HA team will be involved in them too. So far, XC HA team has not released any of the code, documentation or other materials. Please understand that (mainly because of administrative reasons) we're not planning to open XC HA team activities to public except for requirements to Postgres-XC core, which might have some influence to Postgres-XC design, performance and operations etc. The XC HA team is planning to make its activities open to public when the first Postgres-XC HA facility is released. Best Regards; --- Tetsuo Sakata (2012/07/27 9:20), Koichi Suzuki wrote: > I've heard another group is working together with Linux HA Japan to > provide XC RA's. > > Sakata-san, could you provide related info if available? > > Regards; > ---------- > Koichi Suzuki > > > 2012/7/24 Nikhil Sontakke <ni...@st...>: >> Hi, >> >> So what's the latest status of these HA activities for PGXC? >> >> Like the coordinator/datanode agents being discussed here, do we have >> agents for GTM for example? Also is this happening in some open source >> group where we can participate and see the latest and greatest source >> changes? >> >> Regards, >> Nikhils -- sakata.tetsuo _at_ lab.ntt.co.jp SAKATA, Tetsuo. Shinagawa Tokyo JAPAN. |