MySQLシェルを使用した論理データベースのバックアップ

MySQL  localhost:3306 ssl  cart  JS > util.dumpSchemas(["cart"], "/home/vagrant/production_backup",{compatibility: ["strip_restricted_grants","force_innodb"],threads :12})

Acquiring global read lock

Global read lock acquired

All transactions have been started

Locking instance for backup

NOTE: Backup lock is not supported in MySQL 5.7 and DDL changes will not be blocked. The dump may fail with an error or not be completely consistent if schema changes are made while dumping.

Global read lock has been released

Writing global DDL files

Writing DDL for table `cart`.`price_tag`

Writing DDL for schema `cart`

Writing DDL for table `cart`.`salaries`

Writing DDL for table `cart`.`sales`

NOTE: Table 'cart'.'sales' had unsupported engine MyISAM changed to InnoDB

Preparing data dump for table `cart`.`price_tag`

Data dump for table `cart`.`price_tag` will be chunked using column `id`

Data dump for table `cart`.`price_tag` will be written to 1 file

Preparing data dump for table `cart`.`salaries`

Data dump for table `cart`.`salaries` will be chunked using column `id`

Data dump for table `cart`.`salaries` will be written to 2 files

Preparing data dump for table `cart`.`sales`

Data dump for table `cart`.`sales` will be chunked using column `id`

Running data dump using 12 threads.

NOTE: Progress information uses estimated values and may not be accurate.

Data dump for table `cart`.`sales` will be written to 1 file                                               

1 thds dumping - 150% (3 rows / ~2 rows), 0.00 rows/s, 0.00 B/s uncompressed, 0.00 B/s compressed          

Duration: 00:00:00s                                                                              

Schemas dumped: 1                                                                                

Tables dumped: 3                                                                                 

Uncompressed data size: 53 bytes                                                                 

Compressed data size: 0 bytes                                                                    

Compression ratio: 53.0                                                                          

Rows written: 3                                                                                  

Bytes written: 0 bytes                                                                           

Average uncompressed throughput: 53.00 B/s                                                       

Average compressed throughput: 0.00 B/s                

util.dumpTables

特定のテーブルをダンプする場合は、dumpTablesユーティリティを使用できます。

テーブルが大きい場合、mysqldumpの時間が長くなります。 dumpTablesユーティリティを使用して時間を短縮します。

util.dumpTables(schema, tables, outputUrl[, options])

util.dumpTables("sbtest", [ "sbtest14", "sbtest16" ], "/home/vagrant/specific_table",{dryRun: true})

​ MySQL  localhost:33060+ ssl  sbtest  JS > util.dumpTables("sbtest", [ "sbtest14", "sbtest16" ], "/home/vagrant/specific_table",{threads: 12})

Acquiring global read lock

Global read lock acquired

All transactions have been started

Locking instance for backup

Global read lock has been released

Writing global DDL files

Writing DDL for table `sbtest`.`sbtest16`

Writing DDL for table `sbtest`.`sbtest14`

Preparing data dump for table `sbtest`.`sbtest16`

Data dump for table `sbtest`.`sbtest16` will be chunked using column `id`

Preparing data dump for table `sbtest`.`sbtest14`

Data dump for table `sbtest`.`sbtest14` will be chunked using column `id`

Running data dump using 12 threads.

NOTE: Progress information uses estimated values and may not be accurate.

Data dump for table `sbtest`.`sbtest16` will be written to 1 file

Data dump for table `sbtest`.`sbtest14` will be written to 1 file

1 thds dumping - 99% (78.07K rows / ~78.08K rows), 0.00 rows/s, 0.00 B/s uncompressed, 0.00 B/s compressed

Duration: 00:00:00s                                                                                       

Schemas dumped: 1                                                                                         

Tables dumped: 2                                                                                          

Uncompressed data size: 892.39 KB                                                                         

Compressed data size: 348.91 KB                                                                           

Compression ratio: 2.6                                                                                    

Rows written: 78068                                                                                       

Bytes written: 348.91 KB                                                                                  

Average uncompressed throughput: 892.39 KB/s                                                              

Average compressed throughput: 348.91 KB/s 

util.loadDump(url[, options])

MySQL  localhost:3306 ssl  sbtest  JS > util.loadDump("/home/vagrant/specific_table", {progressFile :"/home/vagrant/specific_table/log.json",threads :12})

Loading DDL and Data from '/home/vagrant/specific_table' using 12 threads.

Opening dump...

Target is MySQL 8.0.22. Dump was produced from MySQL 8.0.22

Checking for pre-existing objects...

Executing common preamble SQL

[Worker006] Executing DDL script for `sbtest`.`sbtest1`

[Worker004] Executing DDL script for `sbtest`.`sbtest12`

2 thds loading \ 100% (892.39 KB / 892.39 KB), 0.00 B/s, 0 / 2 tables done[Worker001] [email protected]@@0.tsv.zst: Records: 39034  Deleted: 0  Skipped: 0  Warnings: 0

[Worker005] [email protected]@@0.tsv.zst: Records: 39034  Deleted: 0  Skipped: 0  Warnings: 0

Executing common postamble SQL                                                                                                   

2 chunks (78.07K rows, 892.39 KB) for 2 tables in 1 schemas were loaded in 1 sec (avg throughput 892.39 KB/s)

0 warnings were reported during the load.