Tag: MySQL

Hashing Algorithm in MySQL PASSWORD()

Recently we had a question from a customer: What is the hashing algorithm implemented in PASSWORD() ?

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Hashing Algorithm in MySQL PASSWORD()

Recently we had a question from a customer: what is the hashing algorithm implemented in PASSWORD() ? The manual doesn’t give a straight answer in any of these two pages: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html#function_password http://dev.mysql.com/doc/refman/5.1/en/password-hashing.html   It is enough to dig a bit…

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Building libMemcached RPMs

A client running CentOS 5.4 Amazon EC2 instances needed the latest libMemcachedversion installed. With the inclusion of the “make rpm” target, libMemcached makes it easy to build the libMemcached RPMs by doing the following: Spin up a new CentOS Amazon…

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Log Buffer #248, A Carnival of the Vanities for DBAs

Simple messages are the most powerful. Keep it simple is the advice given by top technologists. One reason why blogs are extremely popular is their simplicity. This simplicity comes from the shortness and focus of the message of the blog. This Log Buffer Edition collects some simple yet powerful blog posts for you in Log Buffer #248.

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Using HAProxy for MySQL failovers

There are a number of solutions available for MySQL architecture that provide automatic failover, but the vast majority involve potentially significant and complex changes to existing configurations. Fortunately, HAProxy can be leveraged for this purpose with a minimum of impact…

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Log Buffer #247, A Carnival of the Vanities for DBAs

Thanksgiving is here and the circular chain of thankfulness is going on. Clients are thankful that they have applications, applications are thankful to their databases, database are thankful to their DBAs, and DBAs are thankful to clients. And they all are thankful that there is weekly Log Buffer Edition, of which the latest is Log Buffer #247. :)

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Rails and Database Session Variables

Ruby’s ActiveRecord provides a very robust means of manipulating database table structures especially in the context of automated deployments such as Capistrano. When there is a master-slave database configuration, it may not always be prudent to perform DDL statements on…

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Log Buffer #246, A Carnival of the Vanities for DBAs

Administrators across the database technologies find themselves at the center stage of that and they are sharing tips and tricks regarding that in their blogs. This Log Buffer Edition touches that and much more in Log Buffer #246.

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Non-deterministic Functions and the Binary Log

I wrote this post because I ran across this issue when debugging why tables with triggers/functions that were not getting replicated to slaves. The problem appears when binlog_format is set up  as STATEMENT. You can check the ‘change log’ checking…

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Log Buffer #245, A Carnival of the Vanities for DBAs

Getting stuck on technical problems is a norm in the life of any IT professional and DBAs are no exception. With evolving databases and their streaming new features make it more challenging. Blogs often provide the Eureka moment for those problems. So sit back and enjoy this Log Buffer Edition, which is Log Buffer #245.

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