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In order for a MariaDB server to operate as a data node for Spider, you need to create a table or tables on which to store the data and configure the server to accept client connections from the Spider node. For instance, first create the table: CREATE TABLE test. Spider_example ( id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR ( 50 ) ) ENGINE = InnoDB; Next, create a user for the Spider node and set a password for that user. For the sake of the example, assume the Spider node is at the IP address 192.168.1.1: CREATE USER spider @ 192. ![]() 1; SET PASSWORD FOR spider @ 192. 1 = PASSWORD ( 'passwd' ); Then grant the spider user privileges on the example table. GRANT ALL ON test. Spider_example TO spider @ 192. 1; The data node is now ready for use. You can test it by attempting to connect the MariaDB client to the data from the Spider node. For instance, assuming the data node is at the IP address 192.168.1.5, SSH into the Spider node then try to establish a client connection. $ mysql -u spider -p -h 192.168.1.5 test -e 'SHOW TABLES;' +----------------+| Tables_in_test| +----------------+| spider_example| +----------------+ Configuring Spider Nodes With the data node or data nodes configured, you can set up the Spider node to use them. The Spider node is the MariaDB server that receives queries for the table, (in this case test.spider_example). It then uses the Spider storage engine to connect to the tables on the data nodes to retrieve data and return the result-set. Node Configuration In order to use Spider, you need to run the configuration script on the Spider node. You can check whether it has been installed already by querying the Information Schema. SELECT ENGINE, SUPPORT FROM information_schema. ENGINES; + --------------------+---------+| ENGINE| SUPPORT| + --------------------+---------+| CSV| YES|| MyISAM| YES|| BLACKHOLE| YES|| FEDERATED| YES|| MRG_MyISAM| YES|| ARCHIVE| YES|| MEMORY| YES|| PERFORMANCE_SCHEMA| YES|| Aria| YES|| InnoDB| DEFAULT| + --------------------+---------+ If Spider does not appear in this list, you need to run the configuration script. Download fast the latest version of iDefrag for Mac: Now, you will be able to defragment your disk easier with iDefrag. Also, iDefrag will offer us the possibility to analyze the state of our disks and defragment its content so we can have more free space in the disk, what will allow us to be able to. Idefrag mac full free download. IDefrag for Mac is advanced Mac OS X disk defragmentation and optimization tool. 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Sql Note: If you're running a source code distribution of MariaDB, (that is, where you compiled it from source), the script is located in the build directory at storage/spider/scripts/install_spider.sql. To confirm that it has been installed, query the Information Schema again, SELECT ENGINE, SUPPORT FROM information_schema. ENGINES WHERE ENGINE = 'SPIDER'; + --------------------+---------+| ENGINE| SUPPORT| + --------------------+---------+| SPIDER| YES| + --------------------+---------+ Running this configuration script also creates a series of new tables in the mysql database, including: • spider_link_failed_log • spider_link_mon_servers • spider_tables • spider_xa • spider_xa_failed_log • spider_xa_member It also upgrades the format of the tables if upgrading from an earlier version. Configure the Server In order to connect the Spider node to the data nodes, you need to issue a statement for each data node. You can then use the server definition in creating the Spider table. CREATE SERVER dataNode1 FOREIGN DATA WRAPPER mysql OPTIONS ( HOST '192.168.1.5', DATABASE 'test', USER 'spider' PASSWORD 'passwd', PORT 3306 ); In the event that you need to modify or replace this server after setting up the Spider table, remember to issue a statement to update the server definition.
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