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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