I uploaded my presentation for the 2014 Cassandra summit to slideshare. Cassandra Metrics from Chris Lohfink The video of the talk will be uploaded in a few weeks, I will post it here then.
This year I was named a MVP for Cassandra from Datastax. Its great to get the recognition from my peers and be part of this awesome community! In 2014 I spoke at few Cassandra meetups (both Minnesota and SF), and gave a talk at the Cassandra Summit. I have been answering questions in IRC and the userlist throughout […]
I gave a talk at recent Cassandra meetup on the data structure that is conceptually used for Cassandras read/write path. Having a solid understanding of this is something critical to debugging and creating an appropriate data model for Cassandra. DataStax academy has a couple highly recommended courses that covers this in a lot more detail. Something it […]
This guide I wrote provides a description of the different thread pools and how to monitor them. Includes what to alert on, common issues and solutions. The documentation for these hasn’t been available and took a bit of digging in the source. http://www.evidencebasedit.com/guide-to-cassandra-thread-pools/
Gave a quick intro to tpstats as a lightning talk for a Minneapolis Cassandra meetup. Slides available on: slideshare I am fleshing out the content to describe each stage in Cassandra in more detail for an extension of this talk.
I committed an implementation of HRW on github. It seems to have an advantage over consistent hashing in having an even distribution of data across all the nodes after modifications to the pool. Consistent hashing mitigates its weakness by placing nodes multiple times into the ring creating many virtual nodes. HRW tends to be slower […]
Using a camera, opencv, and some triacs I set up some lights to point to our house for halloween. The neighborhood kids had fun running through the lawn. David really enjoyed his first halloween and we are look forward to next year.
As a wireless sprinkler head, cat deterrent or just randomness I threw this together for fun. Controlled with an arduino over a xbee via custom serial protocol. Can shoot, set the pan/tilt angles and beep with a speaker (beneath breadboard). Be fun to try to carry on an airplane if nothing else