Category Archives: Hadoop

Linux Leap Second Bug Increased CPU and Power Consumption

The Linux kernel has struggled with leap seconds since at least 2005. Fascinating graph below of a data center’s (Hetzner in Germany) additional power consumption after the most recent (2012) leap second bug was triggered: Leap second bug caused power … Continue reading

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Bay Area Hadoop User Group Monthly Meetup – Datameer and Oozie

I went to the Bay Area Hadoop User Group (HUG) Monthly Meetup at Yahoo! tonite. It was nice to see URL’s Restaurant again. 🙂 There was a demo of Datameer. After that, two Yahoo! engineers gave a lecture on the … Continue reading

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Cassandra User Group: Jonathan Ellis Discusses Cassandra 1.1

At the Cassandra User Group Meetup tonite, Jonathan Ellis discussed Apache Cassandra 1.1 for an hour and answered questions. Jonathan Ellis is project chair for Apache Cassandra and co-founder of DataStax. “Apache Cassandra 1.1 includes several significant new features, like … Continue reading

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MySQL and Managing Disk Space on linux

As with any complex program, MySQL does not work well when your system runs out of disk space. Typical problems with “disk full” include: manual intervention is difficult and time-consuming when the disk is full, since the DBA is forced … Continue reading

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Humorous NoSQL Videos

NoSQL Better Than MySQL? Episode 1 – MongoDB Is Web Scale Hitler’s Hadoop and NoSQL Downfall Parody O’Reilly MySQL CE 2010: Brian Aker, “A Guide to No-SQL”

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