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Validate page level checksums in base backups

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When base backups are run over the replication protocol (for example
using pg_basebackup), verify the checksums of all data blocks if
checksums are enabled. If checksum failures are encountered, log them
as warnings but don't abort the backup.

This becomes the default behaviour in pg_basebackup (provided checksums
are enabled on the server), so add a switch (-k) to disable the checks
if necessary.

Author: Michael Banck
Reviewed-By: Magnus Hagander, David Steele
Discussion: https://postgr.es/m/20180228180856.GE13784@nighthawk.caipicrew.dd-dns.de
This commit is contained in:
Magnus Hagander
2018-04-03 13:47:16 +02:00
parent 4923550c20
commit 4eb77d50c2
7 changed files with 352 additions and 13 deletions
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8
src/backend/replication/repl_gram.y
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@@ -77,6 +77,7 @@ static SQLCmd *make_sqlcmd(void);
%token K_MAX_RATE
%token K_WAL
%token K_TABLESPACE_MAP
%token K_NOVERIFY_CHECKSUMS
%token K_TIMELINE
%token K_PHYSICAL
%token K_LOGICAL
@@ -154,7 +155,7 @@ var_name: IDENT { $$ = $1; }
/*
* BASE_BACKUP [LABEL '<label>'] [PROGRESS] [FAST] [WAL] [NOWAIT]
* [MAX_RATE %d] [TABLESPACE_MAP]
* [MAX_RATE %d] [TABLESPACE_MAP] [NOVERIFY_CHECKSUMS]
*/
base_backup:
K_BASE_BACKUP base_backup_opt_list
@@ -208,6 +209,11 @@ base_backup_opt:
$$ = makeDefElem("tablespace_map",
(Node *)makeInteger(true), -1);
}
| K_NOVERIFY_CHECKSUMS
{
$$ = makeDefElem("noverify_checksums",
(Node *)makeInteger(true), -1);
}
;
create_replication_slot: