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Doc: note gpbackup one-second timestamp limit - #404
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TomShawn
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Oct 10, 2026
The gpbackup timestamp (YYYYMMDDHHMMSS) is the unique backup ID and has one-second granularity. It also names the backup directory and lock file, so a second gpbackup started within the same second fails with "A backup with timestamp ... is already in progress. Wait 1 second and try the backup again." This often happens when scripts back up schemas one by one. Document this limitation in the gpbackup reference and add a tip to the full backup guide. Suggest adding a delay between runs, or backing up multiple schemas or tables in a single gpbackup command. Both docs/ and versioned_docs/version-2.x/ are updated. See: apache/cloudberry#1714 Assisted-by: Claude Code
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What
Document that
gpbackupcannot start more than one backup within the same second.sys-utilities/gpbackup.md: add a paragraph in the Description section explaining the one-second timestamp granularity, the resulting error message, and how to avoid it.sys-admin/backup-and-restore/perform-full-backup-and-restore.md: add a tip under "Filter by schema" for scripts that back up schemas one by one.Both
docs/andversioned_docs/version-2.x/are updated.Why
The backup timestamp (
YYYYMMDDHHMMSS) is the unique backup ID and also names the backup directory and lock file. When a script runsgpbackuprepeatedly and two runs start in the same second, the later one fails with:This is an architectural limitation rather than a bug, as discussed in apache/cloudberry#1714.
See: apache/cloudberry#1714