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Author: Aleksandr Kuzminsky

Setting Up Authentication En Masse

Managing many hosts is a quite challenging task. There are many tools to solve the problem. My favorite is pdsh. Running a command across a set of hosts is as simple as following:

Together with dshbak (which is a part of pdsh package) you can do even cooler things. Like, check which systems have […]

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InnoDB Dictionary

Why Does InnoDB Need A Dictionary An InnoDB dictionary is a set of internal tables InnoDB uses to maintain various information about user tables. It serves as API between a human and the database. While the humans refer to tables by their names, InnoDB works with integer identifiers. The dictionary stores correspondence between table name […]

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A Real Example Of Nagios Monitoring

It’s now time to setup proper monitoring to avoid unpleasant surprises in future. There are two major problems the monitoring solves: alerting and trending. Alerting is to notify the person in charge about a major event like service failing to work. Trending is to track the change of something over time – disk or memory […]

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