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Cascading replication feature for streaming log-based replication.

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Standby servers can now have WALSender processes, which can work with
either WALReceiver or archive_commands to pass data. Fully updated
docs, including new conceptual terms of sending server, upstream and
downstream servers. WALSenders terminated when promote to master.

Fujii Masao, review, rework and doc rewrite by Simon Riggs
This commit is contained in:
Simon Riggs
2011-07-19 03:40:03 +01:00
parent 3d4890c0c5
commit 5286105800
10 changed files with 424 additions and 190 deletions
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5
src/backend/replication/basebackup.c
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@ -339,6 +339,11 @@ SendBaseBackup(BaseBackupCmd *cmd)
MemoryContext old_context;
basebackup_options opt;
if (am_cascading_walsender)
ereport(FATAL,
(errcode(ERRCODE_CANNOT_CONNECT_NOW),
errmsg("recovery is still in progress, can't accept WAL streaming connections for backup")));
parse_basebackup_options(cmd->options, &opt);
backup_context = AllocSetContextCreate(CurrentMemoryContext,