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Support configurable WAL segment size.

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PostgreSQL 11 introduces configurable WAL segment sizes, from 1MB to 1GB.

There are two areas that needed to be updated to support this: building the archive-get queue and checking that WAL has been archived after a backup.  Both operations require the WAL segment size to properly build a list.

Checking the archive after a backup is still implemented in Perl and has an active database connection, so just get the WAL segment size from the database.

The archive-get command does not have a connection to the database, so get the WAL segment size from pg_control instead.  This requires a deeper inspection of pg_control than has been done in the past, so it seemed best to copy the relevant data structures from each version of PostgreSQL and build a generic interface layer to address them.  While this approach is a bit verbose, it has the advantage of being relatively simple, and can easily be updated for new versions of PostgreSQL.

Since the integration tests generate pg_control files for testing, teach Perl how to generate files with the correct offsets for both 32-bit and 64-bit architectures.
This commit is contained in:
David Steele
2018-09-25 10:24:42 +01:00
parent c0b0b4e541
commit d038b9a029
68 changed files with 4949 additions and 486 deletions
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22
src/postgres/interface/v100.h Normal file
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/***********************************************************************************************************************************
PostgreSQL 10 Interface
***********************************************************************************************************************************/
#ifndef POSTGRES_INTERFACE_INTERFACE100_H
#define POSTGRES_INTERFACE_INTERFACE100_H
#include "postgres/interface.h"
/***********************************************************************************************************************************
Functions
***********************************************************************************************************************************/
bool pgInterfaceIs100(const Buffer *controlFile);
PgControl pgInterfaceControl100(const Buffer *controlFile);
/***********************************************************************************************************************************
Test Functions
***********************************************************************************************************************************/
#ifdef DEBUG
void pgInterfaceControlTest100(PgControl pgControl, Buffer *buffer);
#endif
#endif