Monday, December 19, 2011

Testing new builds with MySQL-Sandbox 3.0.24

MySQL::Sandbox 3.0.24 was released yesterday, with many new features.

More than vanilla MySQL

If you have missed my previous announcement, here's the gist of it. MySQL Sandbox can now deal with tarballs from either Percona Server or MariaDB. The main difference after this change is that you can now create a directory called <PREFIX>5.5.16 and make_sandbox will recognize it as well as the plain 5.5.16.
$ make_sandbox --export_binaries --add_prefix=ps \
   Percona-Server-5.5.11-rel20.2-114.Darwin.i386.tar.gz  \
   -- --sandbox_directory=msb_ps5_5_11
unpacking Percona-Server-5.5.11-rel20.2-114.Darwin.i386.tar.gz
installing with the following parameters:
upper_directory                = /Users/gmax/sandboxes
sandbox_directory              = msb_ps5_5_11
basedir                        = $HOME/opt/mysql/ps5.5.11
tmpdir                         = 
Your sandbox server was installed in $HOME/sandboxes/msb_ps5_5_11
After the binary export, subsequent installations will be easier:
$ make_sandbox ps5.5.11
The same commands can be used for MariaDB. At the moment, make_sandbox does not recognize other packages, but adding them should not be a big deal, provided that such packages look like MySQL. It wouldn't work with Drizzle, because it lacks the main ingredients for MySQL installation.

High Performance sandboxes

While testing parallel replication and prefetch slaves with Tungsten Replicator, I realized that I was doing too much manual fiddling with my scripts. Since I need more performant servers, I added the basic items that I need to modify to enable a faster server. Now, using the '--high_performance' option with make_sandbox, you get a server that is much better than out-of-the-box MySQL. To avoid problems with too much RAM, I am using a default of 512 MB for InnoDB, which is not enough for really demanding tests, but at least it is a good placeholder in the sandbox configuration file, should you need to modify it.
$ make_sandbox 5.1.60 -- --high_performance
innodb-flush-method=O_DIRECT ; \
innodb-log-file-size=50M ; \
innodb_buffer_pool_size=512M ; \
max_allowed_packet=48M ; \
max-connections=350 ; \
innodb-additional-mem-pool-size=50M ; \
innodb-log-buffer-size=50M ; sync_binlog=0 ; \
innodb-thread-concurrency=0 ; log-error=msandbox.err

Standalone masters and slaves

MySQL Sandbox has had the ability of creating replicated systems for years. Yet, sometimes you need a stand-alone master server that you want to use for some odd experiment. Similarly, you may want to create a slave of a specific master without having a full replication system. One case where you would like this ability is when you want to try replicating between servers of different versions.
$ make_sandbox 5.1.57 -- --master
my_clause                      = server-id=5157 ; log-bin=mysql-bin ; log-error=msandbox.err
Your sandbox server was installed in $HOME/sandboxes/msb_5_1_57

$ make_sandbox 5.5.10 -- --slaveof='master_port=5157' 
my_clause                      = server-id=5510 ; log-bin=mysql-bin ; log-error=msandbox.err
Your sandbox server was installed in $HOME/sandboxes/msb_5_5_10

$ ~/sandboxes/msb_5_1_57/use -e 'show master status'
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
| mysql-bin.000001 |      106 |              |                  |

$ ~/sandboxes/msb_5_5_10/use -e 'show slave status\G'
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_User: rsandbox
                  Master_Port: 5157
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 106
               Relay_Log_File: mysql_sandbox5510-relay-bin.000002
                Relay_Log_Pos: 252
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
                   Last_Errno: 0
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 106
              Relay_Log_Space: 420
              Until_Condition: None
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
               Last_SQL_Errno: 0
             Master_Server_Id: 5157
You can download MySQL::Sandbox from either launchpad or CPAN.

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