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MariaDB Storage Engines including CONNECT Storage Engine and JSON
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MariaDB pres at LeMUG
1.
© MariaDB Corporation
Ab MariaDB Storage Engines Serge Frezefond, Cloud Solution Architect serge.frezefond@mariadb.com @sfrezefond http://serge.frezefond.com * *23/02/2015 1
2.
© MariaDB Corporation
Ab Agenda • TokuDB • Spider • CONNECT • Conclusion 23/02/2015 2
3.
© MariaDB Corporation
Ab TokuDB - Better Performance • TokuDB® uses Fractal Tree® technology: – Internal nodes are similar to B-trees, but they also have message buffers – Large block size (4M) enables better compression performance and range queries. – Basement nodes support point queries o Default size 128K – Optimal I/O utilization: o Reads: highly compressed data o Writes: aggregation of multiple operations + high compression.
4.
© MariaDB Corporation
Ab TokuDB - Fractal Tree Indexes Each node has pivots & Buffers Buffers fill as updates arrive
5.
© MariaDB Corporation
Ab Fractal Tree Indexes Each node has pivots & Buffers Buffers fill as updates arrive Flush a buffer when it fills A flush might take an I/O, but it does lots of useful work More changes per write ➔ fewer changes for same write load ➔ less SSD wear
6.
© MariaDB Corporation
Ab Better Indexing Improves Performance • • High performance during INSERT/UPDATE/DELETE operations
7.
© MariaDB Corporation
Ab Typical Strategies • Partitioning – Adds complexity – Table scans, when needed, are slower • Covering indexes – Secondary keys require additional PK lookup – Slows down write operations • InnoDB compression – Affects performance • Read-only slaves – Adds complexity – Slave delays • SSD
8.
© MariaDB Corporation
Ab Using TokuDB • Partitioning – Better performance w/ bigger partitions • CLUSTERING KEY – Better secondary key insertion – Less indexes overall • TokuDB compression – Always on – Compression alternatives: quicklz, zlib, lzma • Read-only slaves – Upsert / Insert optimization • SSD – Compression == better utilization
9.
© MariaDB Corporation
Ab Spider Storage Engine • Developed by Kentoku Shiba • Storage Engine „partitions“ tables across multiple Database Server instances • Based on Partitions with integrated Sharding • Virtual view on tables distributed across Instances • Supports XA transactions • Transactional Storage Engine • Provides Scale-Out in Combination with HA 9 Application Customer A-H I-P Q-Z Spider Customet A-H Shard 1 Customer I-P Shard 2 Customer Q-Z Shard 3
10.
© MariaDB Corporation
Ab Sharding using Spider 10 Backend 2 Application Spider Backend 3 T1 P1 P2 P3 T1 P2 T1 P3 Backend 1 T1 P1 XA 2 PC
11.
© MariaDB Corporation
Ab Sharding with Spider and HA 11 Backend 2 Application Spider Backend 3 T1 P1 P2 P3 T1 P2 T1 P3 Backend 1 T1 P1 XA 2 PC P2 P3 P1
12.
© MariaDB Corporation
Ab Spider Storage Engine Installation • Installation • Spider will be shown as active Storage Engine 12 mysql -uroot -p < /usr/share/mysql/install_spider.sql SELECT engine, support, transactions, xa FROM information_schema.engines; +--------------------+---------+--------------+------+ | engine | support | transactions | xa | +--------------------+---------+--------------+------+ | SPIDER | YES | YES | YES | | CSV | YES | NO | NO |
13.
© MariaDB Corporation
Ab Spider Storage Engine Installation • Spider creates tables in Schema „mysql“ 13 MariaDB [mysql]> show tables like 'spider%'; +---------------------------+ | Tables_in_mysql (spider%) | +---------------------------+ | spider_link_failed_log | | spider_link_mon_servers | | spider_tables | | spider_xa | | spider_xa_failed_log | | spider_xa_member | +---------------------------+ 6 rows in set (0.00 sec)
14.
© MariaDB Corporation
Ab Spider Storage Engine Installation • 93 Spider System-Variables will be added • 4 Spider Status-Values will be added • More Spider Variables related to tables using CREATE TABLE • In MariaDB use COMMENT • In MySQL use CONNECTION 14 MariaDB [mysql]> show global variables like 'spider%’; MariaDB [mysql]> show global status like 'spider%’;
15.
© MariaDB Corporation
Ab Spider Storage Engine Example without Sharding • Table definition on Spider Proxy-Node • Table definition on Backend-Nodes 15 CREATE TABLE spiderfederation(id INT NOT NULL, code VARCHAR(10), PRIMARY KEY(id)) ENGINE=SPIDER COMMENT 'host "192.168.56.21", user "backend", password "backend", port "3306"'; CREATE TABLE spiderfederation(id INT NOT NULL, code VARCHAR(10), PRIMARY KEY(id)) ENGINE=INNODB;
16.
© MariaDB Corporation
Ab Spider Storage Engine Example using Sharding • Table definition on Spider Proxy-Node 16 CREATE TABLE sharding(id INT NOT NULL, code VARCHAR(10), PRIMARY KEY(id)) ENGINE=SPIDER COMMENT='user "backend", password "backend", port "3306", table "sharding"' PARTITION BY RANGE(id) ( PARTITION p1 VALUES LESS THAN (100000) COMMENT 'host "192.168.56.21"', PARTITION p2 VALUES LESS THAN (200000) COMMENT 'host "192.168.56.22"', PARTITION p3 VALUES LESS THAN MAXVALUE COMMENT 'host "192.168.56.23"' );
17.
© MariaDB Corporation
Ab Spider Storage Engine Installation • Spider UDFs will be added • SPIDER_DIRECT_SQL • Execute SQL on Backend-Server • SPIDER_BG_DIRECT_SQL • Execute SQL on Backend-Server • SPIDER_COPY_TABLES • SPIDER_FLUSH_TABLE_MON_CACHE • Reset Spider Monitoring Information 17
18.
© MariaDB Corporation
Ab CONNECT Storage Engine 23/02/2015 18
19.
© MariaDB Corporation
Ab Goal of the CONNECT Storage Engine : BI on various targets Most of the data in companies is in various external datasources (many in non relational database format) : – relational databases: Oracle, SQL Server… – Dbase, Firebird, SQlite – Microsoft Access & Excel – Distributed mysql servers – DOS,FIX,BIN,CSV, XML – stored per column... Not targeted for OLTP 2014/02/02 19
20.
© MariaDB Corporation
Ab The CONNECT Storage Engine 2014/02/02 20 MySQL Server / MariaDB MyISA M InnoDB Memory Connect Federate d Merge CSV ... ODBC MySQL XML CSV DIR TBL JSON ... XML CSV ODBC MySQ L DIR ...
21.
© MariaDB Corporation
Ab The CONNECT Storage Engine implements advanced features Condition Push down – Used with ODBC and MySQL to push condition to the target database. Big perf gain set optimizer_switch='engine_condition_pushdown=on‘ • Support MariaDB virtuals columns • Support of special columns : – Rowid, fileid, tabid, servid • Extensible with the OEM file type • Catalog table for table metadata(ODBC …)
22.
© MariaDB Corporation
Ab CONECT File table type • DOS,FIX,BIN,FMT,CSV,INI,XML, JSON • Support virtual tables (DIR) • Large tables support (>2GB) • Compression - gzlib format • Memory file maping • Add read optimized indexing to files • Multiple CONNECT tables can be created on the same underlying file • Indexes can be shared between tables
23.
© MariaDB Corporation
Ab CONNECT Storage Engine ODBC table type Allow to access to any ODBC datasource. – Excel, Access, Firebird, SQLite – SQL Server, Oracle, DB2 • Supports insert, update, delete and any other commands • Multi files ODBC: consolidated monthly excel datasheet • Access to ODBC and UnixODBC data sources • WHERE conditions are push to the ODBC source
24.
© MariaDB Corporation
Ab XML Table Type <?xml version="1.0" encoding="ISO-8859-1"?> <BIBLIO SUBJECT="XML"> <BOOK ISBN="9782212090819" LANG="fr" SUBJECT="applications"> <AUTHOR> <FIRSTNAME>Jean-Christophe</FIRSTNAME> <LASTNAME>Bernadac</LASTNAME> </AUTHOR> <TITLE>Construire une application XML</TITLE> <PUBLISHER> <NAME>Eyrolles</NAME> <PLACE>Paris</PLACE> </PUBLISHER> <DATEPUB>1999</DATEPUB> </BOOK> </BIBLIO>
25.
© MariaDB Corporation
Ab XML Table Type create table xsampall ( isbn char(15) field_format='@ISBN', authorln char(20) field_format='AUTHOR/LASTNAME', title char(32) field_format='TITLE', translated char(32) field_format='TRANSLATOR/@PREFIX', year int(4) field_format='DATEPUB') engine=CONNECT table_type=XML file_name='Xsample.xml' tabname='BIBLIO' option_list='rownode=BOOK,skipnull=1';
26.
© MariaDB Corporation
Ab XMLTable Type Query Result select isbn, subject, title, publisher from xsamp2; ISBN SUBJEC TTITLE PUBLISHER 9782212090819 applications Construire une application XML Eyrolles Paris 9782840825685 applications XML en Action Microsoft Press Can also generate HTML
27.
© MariaDB Corporation
Ab JSON Table Type [ { "ISBN": "9782212090819", "LANG": "fr", "SUBJECT": "applications", "AUTHOR": [ { "FIRSTNAME": "Jean-Christophe", "LASTNAME": "Bernadac" }, … ], "TITLE": "Construire une application XML", "PUBLISHER": { …
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Ab JSON Table Type create table jsampall ( ISBN char(15), Language char(2) field_format='LANG', Subject char(32) field_format='SUBJECT', Author char(128) field_format='AUTHOR:[" and "]', Title char(32) field_format='TITLE', Publisher char(20) field_format='PUBLISHER:NAME', Location char(16) field_format='PUBLISHER:PLACE', Year int(4) field_format='DATEPUB') engine=CONNECT table_type=JSON File_name='biblio3.jsn';
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Ab JSON Table Type Query Result select title, author, publisher, location from jsampall; The result is: Title author publisher location Construire application XML Jean Bernadac and François Knab Eyrolles Paris XML en Action William J. Pardi Microsoft Press Paris
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Ab JSON Table Type The Jpath Specification Specification Array Type Description [n] All Take the nth value of the array. Ignore it if n is 0. [X] or [x] All Expand. Generate one row for each array value. ["string”] String Concatenate all values separated by the specified string. [+] Numeric Make the sum of all the array values. [*] Numeric Make the product of all array values. [!] Numeric Make the average of all the array values. [>] or [<] All Return the greatest or least value of the array. [#] All Return the number of values in the array. [] All Sum if numeric, else concatenation separated by “, “. All Take the first value if an array.
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Ab Questions? www.mariadb.com www.facebook.com/mariadb.dbms www.twitter.com/mariadb ------------------------------------ Serge Frezefond, Cloud Solution Architect serge.frezefond@mariadb.com @sfrezefond http://serge.frezefond.com
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