Extended mysqldump¶
Backup locks support¶
When used together with the –single-transaction option, the
lock-for-backup option makes mysqldump issue LOCK
TABLES FOR BACKUP before starting the dump operation to prevent
unsafe statements that would normally result in an inconsistent
backup.
More information can be found on the Backup Locks feature documentation.
Compressed columns support¶
mysqldump supports the Compressed columns with dictionaries feature. More information about the relevant options can be found on the Compressed columns with dictionaries feature page.
Taking backup by descending primary key order¶
–order-by-primary-desc tells mysqldump to take the backup by
descending primary key order (PRIMARY KEY DESC) which can be useful if
the storage engine is using the reverse order column for a primary key.
RocksDB support¶
mysqldump detects when MyRocks is installed and available. If there is a session variable named rocksdb_skip_fill_cache mysqldump sets it to 1.
mysqldump will now automatically enable session the variable rocksdb_bulk_load if it is supported by the target server.
Version specific information¶
- 8.0.12-1: The feature was ported from Percona Server for MySQL 5.7