mydumper
0.16.7-5
MyDumper is a MySQL Logical Backup Tool. It has 2 tools:
mydumper which is responsible to export a consistent backup of MySQL databasesmyloader reads the backup from mydumper, connects to the destination database and imports the backup.Both tools use multithreading capabilities.
MyDumper is Open Source and maintained by the community, it is not a Percona, MariaDB or MySQL product.
Official Documentation (work in progress)
This sections has been migrated
First get the correct url from the releases section then:
release=$(curl -Ls -o /dev/null -w %{url_effective} https://github.com/mydumper/mydumper/releases/latest | cut -d'/' -f8)
yum install https://github.com/mydumper/mydumper/releases/download/${release}/mydumper-${release:1}.el7.x86_64.rpm
yum install https://github.com/mydumper/mydumper/releases/download/${release}/mydumper-${release:1}.el8.x86_64.rpmFor ubuntu, you need to install the dependencies:
apt-get install libatomic1Then you can download and install the package:
release=$(curl -Ls -o /dev/null -w %{url_effective} https://github.com/mydumper/mydumper/releases/latest | cut -d'/' -f8)
wget https://github.com/mydumper/mydumper/releases/download/${release}/mydumper_${release:1}.$(lsb_release -cs)_amd64.deb
dpkg -i mydumper_${release:1}.$(lsb_release -cs)_amd64.debBy using pkg
pkg install mydumperor from ports
cd /usr/ports/databases/mydumper && make installBy using Homebrew
brew install mydumperTake into account that the mydumper.cnf file is going to be located on /usr/local/etc or /opt/homebrew/etc. So, you might need to run mydumper/myloader with:
mydumper --defaults-file=/opt/homebrew/etc/mydumper.cnf
myloader --defaults-file=/opt/homebrew/etc/mydumper.cnfapt-get install cmake g++ gityum install -y cmake gcc gcc-c++ git makesudo port install cmake pkgconfigapt-get install libglib2.0-dev zlib1g-dev libpcre3-dev libssl-dev libzstd-devyum install -y glib2-devel openssl-devel pcre-devel zlib-devel libzstd-develzypper install glib2-devel libmysqlclient-devel pcre-devel zlib-develsudo port install glib2 pcreYou need to select one vendor development library.
apt-get install libmysqlclient-dev
apt-get install libperconaserverclient20-dev
apt-get install libmariadbclient-devyum install -y mysql-devel
yum install -y Percona-Server-devel-57
yum install -y mariadb-develCentOS 7 comes by default with MariaDB 5.5 libraries which are very old. It might be better to download a newer version of these libraries (MariaDB, MySQL, Percona etc).
zypper install libmysqlclient-develsudo port install mariadb-10.11
sudo port select mysqlRun:
cmake .
make
sudo make installOne has to make sure, that pkg-config, mysql_config, pcre-config are all in $PATH
Binlog dump is disabled by default to compile with it you need to add -DWITH_BINLOG=ON to cmake options
To build against mysql libs < 5.7 you need to disable SSL adding -DWITH_SSL=OFF
You can download the official docker image or you can build the Docker image either from local sources or directly from Github sources with the provided Dockerfile.
docker build --build-arg CMAKE_ARGS='-DWITH_ZSTD=ON' -t mydumper github.com/mydumper/mydumperKeep in mind that the main purpose the Dockerfile addresses is development and build from source locally. It might not be optimal for distribution purposes, but can also work as a quick build and run solution with the above one-liner, though.
See Usage
This is all done following best MySQL practices and traditions:
This for now does not provide consistent snapshots for non-transactional engines - support for that is expected in 0.2 :)
Once can use --regex functionality, for example not to dump mysql, sys and test databases:
mydumper --regex '^(?!(mysql.|sys.|test.))'To dump only mysql and test databases:
mydumper --regex '^(mysql.|test.)'To not dump all databases starting with test:
mydumper --regex '^(?!(test))'To dump specific tables in different databases (Note: The name of tables should end with $. related issue):
mydumper --regex '^(db1.table1$|db2.table2$)'If you want to dump a couple of databases but discard some tables, you can do:
mydumper --regex '^(?=(?:(db1.|db2.)))(?!(?:(db1.table1$|db2.table2$)))'Which will dump all the tables in db1 and db2 but it will exclude db1.table1 and db2.table2
Of course, regex functionality can be used to describe pretty much any list of tables.
You can execute external commands with --exec like this:
mydumper --exec "/usr/bin/gzip FILENAME"--exec is single threaded, similar implementation than Stream. The exec program must be an absolute path. FILENAME will be replaced by the filename that you want to be processed. You can set FILENAME in any place as an argument.
The default file (aka: --defaults-file parameter) is starting to be more important in MyDumper
[mydumper]
host = 127.0.0.1
user = root
password = p455w0rd
database = db
rows = 10000
[myloader]
host = 127.0.0.1
user = root
password = p455w0rd
database = new_db
innodb-optimize-keys = AFTER_IMPORT_PER_TABLEPrior to v0.14.0-1:
[mydumper_variables]
wait_timeout = 300
sql_mode = ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
[myloader_variables]
long_query_time = 300
innodb_flush_log_at_trx_commit = 0From to v0.14.0-1:
[mydumper_session_variables]
wait_timeout = 300
sql_mode = ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
[mydumper_global_variables]
sync_binlog = 0
slow_query_log = OFF
[myloader_session_variables]
long_query_time = 300
[myloader_global_variables]
sync_binlog = 0
innodb_flush_log_at_trx_commit = 0[`db`.`table`]
where = column > 20
limit = 10000
[`myd_test`.`t`]
columns_on_select=qty,price+20
columns_on_insert=qty,priceIMPORTANT: when using options that don't require an argument like: --no-data or --events, you need to set any value to those variables which will always indicate: TRUE/ON/ENABLE. It is a MISCONCEPTION if you think that adding --no-data=0 will export data:
[mydumper]
no-data=0
Will NOT export the data as no-data is being specified.
