diff options
| author | Magnus Hagander | 2018-04-05 19:57:26 +0000 |
|---|---|---|
| committer | Magnus Hagander | 2018-04-05 20:04:48 +0000 |
| commit | 1fde38beaa0c3e66c340efc7cc0dc272d6254bb0 (patch) | |
| tree | 1e8291cd8523789d919e239e92aa3ecd6aa749de /src/bin/pg_upgrade/controldata.c | |
| parent | c39e903d510064e4415bbadb43e34f6998351cca (diff) | |
Allow on-line enabling and disabling of data checksums
This makes it possible to turn checksums on in a live cluster, without
the previous need for dump/reload or logical replication (and to turn it
off).
Enabling checkusm starts a background process in the form of a
launcher/worker combination that goes through the entire database and
recalculates checksums on each and every page. Only when all pages have
been checksummed are they fully enabled in the cluster. Any failure of
the process will revert to checksums off and the process has to be
started.
This adds a new WAL record that indicates the state of checksums, so
the process works across replicated clusters.
Authors: Magnus Hagander and Daniel Gustafsson
Review: Tomas Vondra, Michael Banck, Heikki Linnakangas, Andrey Borodin
Diffstat (limited to 'src/bin/pg_upgrade/controldata.c')
| -rw-r--r-- | src/bin/pg_upgrade/controldata.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/bin/pg_upgrade/controldata.c b/src/bin/pg_upgrade/controldata.c index 0fe98a550e1..4bb2b7e6ec3 100644 --- a/src/bin/pg_upgrade/controldata.c +++ b/src/bin/pg_upgrade/controldata.c @@ -591,6 +591,15 @@ check_control_data(ControlData *oldctrl, */ /* + * If checksums have been turned on in the old cluster, but the + * checksumhelper have yet to finish, then disallow upgrading. The user + * should either let the process finish, or turn off checksums, before + * retrying. + */ + if (oldctrl->data_checksum_version == 2) + pg_fatal("transition to data checksums not completed in old cluster\n"); + + /* * We might eventually allow upgrades from checksum to no-checksum * clusters. */ |