Tokudb HotBackup

Question

I was trying to evaluate the latest tokudb Hotbackup for percona's tokudb engine.

This install is under debian (Ubuntu 14)

I was able to get all the packages installed with out error and get all the base toku plugins installed.

Attempting to install the backup plug i get

mysql> install plugin tokudb_backup soname 'tokudb_backup.so';
ERROR 1126 (HY000): Can't open shared library '/usr/lib/mysql/plugin/tokudb_backup.so' (errno: 2 /usr/lib/mysql/plugin/tokudb_backup.so: undefined symbol: tokubackup_version_string)

mysql> select @@version;
+-------------+
| @@version   |
+-------------+
| 5.6.27-75.0 |
+-------------+
1 row in set (0.00 sec)

mysql> select @@tokudb_version;
+------------------+
| @@tokudb_version |
+------------------+
| 5.6.27-75.0      |
+------------------+
1 row in set (0.00 sec)

*Edits to comments: *

This file does exist in the filesystem

# ls -l /usr/lib/mysql/plugin/tokudb_backup.so
-rw-r--r-- 1 root root 23736 Nov  3 05:30 /usr/lib/mysql/plugin/tokudb_backup.so

How can I get this installed?

Answer 1

To install Percona TokuBackup:

Run ps_tokudb_admin --enable-backup to add the preload-hotbackup option into [mysqld_safe] section of my.cnf.

$ sudo ps_tokudb_admin --enable-backup
Checking SELinux status...
INFO: SELinux is disabled.

Checking if preload-hotbackup option is already set in config file...
INFO: Option preload-hotbackup is not set in the config file.

Checking TokuBackup plugin status...
INFO: TokuBackup plugin is not installed.

Adding preload-hotbackup option into /etc/my.cnf
INFO: Successfully added preload-hotbackup option into /etc/my.cnf
PLEASE RESTART MYSQL SERVICE AND RUN THIS SCRIPT AGAIN TO FINISH INSTALLATION!

Restart mysql service

$ sudo service mysql restart

Run ps_tokudb_admin --enable-backup again to finish installation of TokuBackup plugin

$ sudo ps_tokudb_admin --enable-backup
Checking SELinux status...
INFO: SELinux is disabled.

Checking if preload-hotbackup option is already set in config file...
INFO: Option preload-hotbackup is set in the config file.

Checking TokuBackup plugin status...
INFO: TokuBackup plugin is not installed.

Checking if Percona Server is running with libHotBackup.so preloaded...
INFO: Percona Server is running with libHotBackup.so preloaded.

Installing TokuBackup plugin...
INFO: Successfully installed TokuBackup plugin.

Answer 2

I think, this is permission problem. Your error:

ERROR 1126 (HY000): Can't open shared library

Your plugin file permission:

# ls -l /usr/lib/mysql/plugin/tokudb_backup.so
-rw-r--r-- 1 root root 23736 Nov  3 05:30 /usr/lib/mysql/plugin/tokudb_backup.so

user mysql - have not rights for execute plugin

compare with other plugins(default rights after installation):

[tech@XXX ~]$ ls -l /usr/lib64/mysql/plugin
total 2512
-rwxr-xr-x 1 root root  27932 Jul 15 00:47 adt_null.so
-rwxr-xr-x 1 root root  38471 Jul 15 00:47 auth.so
-rwxr-xr-x 1 root root  25887 Jul 15 00:47 auth_socket.so