Re: PgCon: who will be there?
От | Markus Wanner |
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Тема | Re: PgCon: who will be there? |
Дата | |
Msg-id | d18f3ddd7fff5d8c2ceeaba0e426394f@localhost обсуждение исходный текст |
Ответ на | Re: PgCon: who will be there? (Koichi Suzuki <koichi.szk@gmail.com>) |
Ответы |
Re: PgCon: who will be there?
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Список | pgsql-cluster-hackers |
Hi, On Fri, 12 Feb 2010 22:21:23 +0900, Koichi Suzuki <koichi.szk@gmail.com> wrote: > 2010/2/12 Fujii Masao <masao.fujii@gmail.com>: >> Umm.. do you think that the "Export snapshots to other sessions" feature >> is >> completely independent of the snapshot management for the parallel >> pg_dump? >> If not, we should make the patch more extensible for the feature we want? I think a common, more general implementation is possible, but certainly requires more work than a plain parallel pg_dump solution. > I don't think so. But in the cluster, from my experience of PG-2, it > is essential to manage snapshot consistent among all the node involved > and we should be very careful to make other local tasks, for example, > autovacuum and analyze, not disturb other transactions because they > can become global long transactions very easily. Well, I fear that's heavily dependent on the clustering solution. So I think the first step will be to have a general purpose snapshot exporting / cloning feature for a single node (i.e. usable for parallel querying). Extending that to allow for distributed parallel querying is the next step. Regards Markus Wanner
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