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Displaying posts with tag: partition (reset)

New Shard-Query features checked into SVN
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I checked some updates to Shard-Query into SVN. Partitioning support has been extended for MySQL 5.6+ to ALL partitioning types.

This includes all previously unsupported types including RANGE LIST/COLUMNS partitioned tables that are partitioned over more than one column, and HASH/KEY/LINEAR variants as well. Shard-Query now exclusively uses the PARTITION hint for partition elimination instead of WHERE clauses in MySQL 5.6. For 5.5 and previous versions, support remains limited to LIST,RANGE, and LIST/RANGE COLUMNS over a single column.

The old mysql interface DAL has been replaced completely by the PDO DAL.

There is no major …

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MySQL Architect at Oracle
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I have worked as an architect in the MySQL/NDB world for more than 20 years and I am still working at Oracle and I like it here. Given all the FUD spread about MySQL I thought it might be a good idea to spread the word about all the great things we're doing to MySQL at Oracle.

#1 We are working on improving modularity in MySQL code base
In the early days of MySQL the MySQL development had serious issues with its development model. It was a model designed for a small code base. I used to work at Ericsson which is developing telecom switches that have systems with tens of millions lines of code. Such large systems require …


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On LVM: How to setup Volume Groups and Logical Volumes.
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LVM (Logical Volume Management) is a very important tool to have in the toolkit of a MySQL DBA. It allows you to create and extend logical volumes on the fly. This allows me to, say, add another disk and extend a partition effortlessly. The other very important feature is the ability to take snapshots, that you can then use for backups. All in all its a must have tool. Hence, this guide will allow you to understand various terminologies associated with LVM, together with setting up LVM volumes and in a later part will also show you how to extend...

Data Warehousing Best Practices: Comparing Oracle to MySQL pt 2
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At Kscope this year, I attended a half day in-depth session entitled Data Warehousing Performance Best Practices, given by Maria Colgan of Oracle. My impression, which was confirmed by folks in the Oracle world, is that she knows her way around the Oracle optimizer.

See …

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Using MySQL Partitioning Instead of MERGE Tables
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One common question I get is how to use partitioning instead of MERGE tables. The process I use involves using stored procedures to create and drop partitions. This article will go over the stored procedures I use; special thanks to Roland Bouman for taking a look and giving great feedback to optimize this process.

First, a simple table, not partitioned (yet):

use test;
DROP TABLE IF EXISTS my_part;
CREATE TABLE IF NOT EXISTS my_part (
  id int NOT NULL,
  creationDate datetime NOT NULL,
  PRIMARY KEY (id,creationDate)
) ENGINE=InnoDB;

In real, life there is more to …

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Kontrollkit – new backup script is partition space aware
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I’ve been wanting to write a backup script for a while now that does the following: reads the partition information for the directory that you are backing up into and computes the used/available/percentage-available space. Then it reads the total data size from the MySQL tables and ensures that you have enough space on disk (for [...]

InnoDB's tablespace ids and Partitions
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There are times when what you have is a partially running database and a bunch of backup innodb tablespace files (the .ibd files). If you're using innodb_file_per_table, then you have a separate .ibd file for each InnoDB table.

Now, you have your running database with a bunch of tables, and you want to replace some of them with the backup .ibd files. According to the MySQL docs, you'd do this:

  1. ALTER TABLE foo DISCARD TABLESPACE; (this deletes the current .ibd file)
  2. copy the old .ibd …


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Intelligent user-controlled partitioning and writing distribution-aware NDB API Applications
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Default partitioning

By default, Cluster will partition based on primary key

When adding rows to a table that’s using MySQL Cluster as the storage engine, each row is assigned to a partition where that partition is mastered by a particular data node in the Cluster. The best performance comes when all of the data required to satisfy a transaction is held within a single partition so that it can be satisfied within  a single data node rather than being bounced back and …

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Presentation: Partitioning in MySQL 5.1
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At the January 2009 Boston User Group I presented a session on the new partitioning feature in MySQL 5.1. I go through how to define partitions, how partitioning makes queries faster, the different types of partitioning and when to use each type, and the restrictions and limitations of partitioning.

The slides are available at http://www.technocation.org/files/doc/2009_01_Partitioning.pdf. The 380.6 Mb .mov movie (1 hr 16 min) can be played directly in your browser at …

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New in MySQL 5.1: Sheeri’s Presentation
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In a nutshell: What’s New in MySQL 5.1.

Release notes: Changes in release 5.1.x (Production).

And yes, very early on (at about two minutes in), I talk about my take on Monty’s controversial post at Oops, we did it again.

To play the video directly, go to …

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Showing entries 1 to 10 of 12 2 Older Entries

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