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Map basebackup tablespaces using a tablespace_map file

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Windows can't reliably restore symbolic links from a tar format, so
instead during backup start we create a tablespace_map file, which is
used by the restoring postgres to create the correct links in pg_tblspc.
The backup protocol also now has an option to request this file to be
included in the backup stream, and this is used by pg_basebackup when
operating in tar mode.

This is done on all platforms, not just Windows.

This means that pg_basebackup will not not work in tar mode against 9.4
and older servers, as this protocol option isn't implemented there.

Amit Kapila, reviewed by Dilip Kumar, with a little editing from me.
This commit is contained in:
Andrew Dunstan
2015-05-12 09:29:10 -04:00
parent d02f16470f
commit 72d422a522
12 changed files with 519 additions and 134 deletions
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src/backend/replication/repl_scanner.l
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@@ -88,6 +88,7 @@ NOWAIT { return K_NOWAIT; }
PROGRESS { return K_PROGRESS; }
MAX_RATE { return K_MAX_RATE; }
WAL { return K_WAL; }
TABLESPACE_MAP { return K_TABLESPACE_MAP; }
TIMELINE { return K_TIMELINE; }
START_REPLICATION { return K_START_REPLICATION; }
CREATE_REPLICATION_SLOT { return K_CREATE_REPLICATION_SLOT; }