TagMySQL

How to Operate Linux Spycams With Motion

When you want something a little simpler and more lightweight than Zoneminder for operating surveillance cameras, try Motion. Motion is a nice lightweight, yet capable application for operating surveillance cameras on Linux. It works with any Linux-supported video camera, including all V4L Webcams, many IP cameras, Axis cameras, and it controls pan and tilt functions. Motion records movies and snapshots in JPEG, PPM, and MPEG formats, and you can view these remotely in a Web browser thanks to Motion’s built-in HTTP server. It stores image files in a directory of your choosing, and it does not require a database, though it supports MySQL and PostgreSQL if you do want to use one. First let’s look at how to get an IP camera working with …

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How to Operate Linux Spycams With Motion

How to improve InnoDB Performance by 55%

During April’s Percona Live MySQL Conference and Expo 2014, I attended a talk on MySQL 5.7 performance an scalability given by Dimitri Kravtchuk, the Oracle MySQL benchmark specialist. He mentioned at some point that the InnoDB double write buffer was a real performance killer. For the ones that don’t know what the innodb double write buffer is, it is a disk buffer were pages are written before being written to the actual data file. Upon restart, pages in the double write buffer are rewritten to their data files if complete. This is to avoid data file corruption with half written pages. I knew it has an impact on performance, on ZFS since it is transactional I always disable it, but I never realized how important the performance …

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How to improve InnoDB performance by 55%

Database Versioning with DBV

It’s good practice to always use a version control system in any of your projects. Be it a side-project in which you are the only developer, or a team project where five or more people are working on it together. But the idea of putting your database into version control isn’t really that widespread. Often times we take the database for granted. But like the source files in our project, the database is constantly changing too. That’s why we also need a way to track the changes that we have made and easily share it to other members of our team. In this article we will take a look at DBV, a database version control system written in PHP for MySQL databases so …

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Database Versioning with DBV

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