8.0.21版的MySQL Shell或者mysqlsh带来三个新的程序用于执行逻辑备份和还原。这个设计用于更容易迁移您的5.7或者8.0中的数据到新的MySQL Data Service，但是它们本身也可以很好地工作。它们具有压缩功能，可以显示活动进度，并且可以将任务分散到多个线程上。
util.dumpInstance()用于备份整个MySQL实例，util.dumpSchemas()让您决定备份哪个schema，util.loadDump()是还原工具。
util.dumpInstance("/tmp/instance",{ "showProgress" : "true" })
<为简洁输出，忽略一部分内容>
>1 thds dumping - 100% (52.82K rows / ~52.81K rows), 0.00 rows/s, 0.00 B/s uncompressed, 0.00 B/s compressed
Duration: 00:00:00s
Schemas dumped: 4
Tables dumped: 26
Uncompressed data size: 3.36 MB
Compressed data size: 601.45 KB
Compression ratio: 5.6
Rows written: 52819
Bytes written: 601.45 KB
Average uncompressed throughput: 3.36 MB/s
Average compressed throughput: 601.45 KB/s
这是在一个在SAS盘，有限内存，最新版的Fedora系统的笔记本上执行的结果。我用这些程序在个更大的实例上执行，发现其性能出色。
这个应用程序和这篇博文中其他功能有日志选项，我建议您设置pager通过\h util.dumpInstance阅读在线帮助。
我创建了一个名为demo的快速测试数据库，表名为x，4个整型字段，1个整型主键，大约一百万记录。以下输出是在一个十年前的笔记本上的输出结果。
JS > util.dumpSchemas(['demo'],"/tmp/demo")
Acquiring global read lock
All transactions have been started
Locking instance for backup
Global read lock has been released
Writing global DDL files
Preparing data dump for table `demo`.`x`
Writing DDL for schema `demo`
Writing DDL for table `demo`.`x`
Data dump for table `demo`.`x` will be chunked using column `id`
Running data dump using 4 threads.
NOTE: Progress information uses estimated values and may not be accurate.
Data dump for table `demo`.`x` will be written to 1 file
1 thds dumping - 100% (1000.00K rows / ~997.97K rows), 577.69K rows/s, 19.89 MB/s uncompressed, 8.58 MB/s compressed
Duration: 00:00:01s
Schemas dumped: 1
Tables dumped: 1
Uncompressed data size: 34.44 MB
Compressed data size: 14.85 MB
Compression ratio: 2.3
Rows written: 999999
Bytes written: 14.85 MB
Average uncompressed throughput: 20.11 MB/s
Average compressed throughput: 8.67 MB/s
性能非常出色。您可以将schema名放入JSON数组中作为第一个参数，一次性备份多个schema。
除非可以从中还原，否则世界上最好的备份是没有用的。我将表x重命名为y，然后恢复数据。
在执行之前请确认local_infile设置为ON。
JS > util.loadDump("/tmp/demo")
Loading DDL and Data from '/tmp/demo' using 4 threads.
Target is MySQL 8.0.21. Dump was produced from MySQL 8.0.21
Checking for pre-existing objects...
Executing common preamble SQL
Executing DDL script for schema `demo`
Executing DDL script for `demo`.`x`
[Worker003] demo@x@@0.tsv.zst: Records: 999999 Deleted: 0 Skipped: 0 Warnings: 0
Executing common postamble SQL
1 chunks (1000.00K rows, 34.44 MB) for 1 tables in 1 schemas were loaded in 20 sec (avg throughput 1.72 MB/s)
0 warnings were reported during the load.
这三个应用程序是保护您的数据安全的非常快速和强大的工具。也许今天还可以看到mysqldump。这三个应用程序和克隆插件证明，您可以比以往更快地保存、复制和恢复数据。