Add parallel pg_dump option.

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New infrastructure is added which creates a set number of workers
(threads on Windows, forked processes on Unix). Jobs are then
handed out to these workers by the master process as needed.
pg_restore is adjusted to use this new infrastructure in place of the
old setup which created a new worker for each step on the fly. Parallel
dumps acquire a snapshot clone in order to stay consistent, if
available.

The parallel option is selected by the -j / --jobs command line
parameter of pg_dump.

Joachim Wieland, lightly editorialized by Andrew Dunstan.

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This commit is contained in:

Andrew Dunstan

2013-03-24 11:27:20 -04:00

parent 3b91fe185a

commit 9e257a181c

22 changed files with 2776 additions and 830 deletions

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