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1.9 KiB
1.9 KiB
slug | title |
---|---|
/en/operations/utilities/backupview | clickhouse_backupview |
clickhouse_backupview
Python module to help analyzing backups made by the BACKUP command. The main motivation was to allows getting some information from a backup without actually restoring it.
This module provides functions to
- enumerate files contained in a backup
- read files from a backup
- get useful information in readable form about databases, tables, parts contained in a backup
- check integrity of a backup
Example:
from clickhouse_backupview import open_backup, S3, FileInfo
# Open a backup. We could also use a local path:
# backup = open_backup("/backups/my_backup_1/")
backup = open_backup(S3("uri", "access_key_id", "secret_access_key"))
# Get a list of databasess inside the backup.
print(backup.get_databases()))
# Get a list of tables inside the backup,
# and for each table its create query and a list of parts and partitions.
for db in backup.get_databases():
for tbl in backup.get_tables(database=db):
print(backup.get_create_query(database=db, table=tbl))
print(backup.get_partitions(database=db, table=tbl))
print(backup.get_parts(database=db, table=tbl))
# Extract everything from the backup.
backup.extract_all(table="mydb.mytable", out='/tmp/my_backup_1/all/')
# Extract the data of a specific table.
backup.extract_table_data(table="mydb.mytable", out='/tmp/my_backup_1/mytable/')
# Extract a single partition.
backup.extract_table_data(table="mydb.mytable", partition="202201", out='/tmp/my_backup_1/202201/')
# Extract a single part.
backup.extract_table_data(table="mydb.mytable", part="202201_100_200_3", out='/tmp/my_backup_1/202201_100_200_3/')
For more examples see the test.