25 lines
1.1 KiB
Markdown
25 lines
1.1 KiB
Markdown
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* https://github.com/jibudata/amberapp/blob/34852920052c58f3d518a28e4d09a50584cf40f8/pkg/postgres/postgres.go
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* Quiesce & Unquiesce
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* https://zrepl.github.io/v0.2.1/configuration/snapshotting.html#postgres-checkpoint-hook
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* https://www.postgresql.org/docs/16/wal-reliability.html
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* https://www.postgresql.org/docs/15/functions-admin.html
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```go
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func takeSnapshot(db *sql.DB, dataset string, height int, tag string) error {
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log.Printf("Taking a ZFS snapshot: %s@%d%s", dataset, height, tag)
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log.Printf(" calling pg_backup_start('blkchain', true)") // pg < 15 use pg_start_backup
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if _, err := db.Exec(`SELECT pg_backupstart('blkchain', true)`); err != nil {
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return err
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}
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log.Printf(" executing COPY (SELECT) TO PROGRAM 'zfs snapshot %s@%d%s'", dataset, height, tag)
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if _, err := db.Exec(fmt.Sprintf(`COPY (SELECT) TO PROGRAM 'zfs snapshot %s@%d%s'`, dataset, height, tag)); err != nil {
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return err
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}
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log.Printf(" calling pg_backup_stop()") // pg < 15 use pg_stop_backup
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if _, err := db.Exec(`SELECT pg_backup_stop()`); err != nil {
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return err
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}
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return nil
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}
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``` |