11
2flower _
пг было до все этих программ и будет,когда они исчезнут, слоны живут долго.
первая версия ПГ 1996 год
1С 1992
БЭСТ 1993
1С 1992
БЭСТ 1993
про бэкап
Validation: automatic data consistency checks and on-demand backup validation without actual data recovery.
Page Validation
If data_checksums are enabled in the database cluster, pg_probackup uses this information to check correctness of data files during backup. While reading each page, pg_probackup checks whether the calculated checksum coincides with the checksum stored in the page header. This guarantees that the Postgres Pro instance and the backup itself have no corrupt pages. Note that pg_probackup reads database files directly from the filesystem, so under heavy write load during backup it can show false-positive checksum mismatches because of partial writes. If a page checksum mismatch occurs, the page is re-read and checksum comparison is repeated.
pg_probackup calculates checksums for each file in a backup during the backup process. The process of checking checksums of backup data files is called the backup validation. By default, validation is run immediately after the backup is taken and right before the restore, to detect possible backup corruption.
