Welome to the DataStax Support Blog. Here you will find articles that cover the entire range of topics related to using DataStax Products, tips on best practices while using DataStax products, as well as insights on how to make your experience with Support as efficient and pleasant as possible.

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August 02, 2018 • By: Ryan Kelly

My name is Ryan Kelly, I study Computing at the University of Ulster, Coleraine and I was an intern in the EMEA technical support team at DataStax.

5thJune 2017 was my first day at DataStax.

Where do I begin…                                                                                                                                                                                                                                   Working at DataStax is nothing like what I expected, and over the past year I have gained experiences that I will never forget. I have met amazing people from all corners of the globe, accomplished experiences I could only dream off as an intern and most importantly, learnt valuable skills I’m not sure I would have learnt anywhere else.

June 18, 2018 • By: Brendan Cicchi

Ever had messages like

INFO  [epollEventLoopGroup-6-2] 2018-05-10 19:10:49,142  Message.java:666 -Unexpected exception during request; channel = [id: 0xa5fa6b7c, L:/ ! R:/]
io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record

in your DSE logs and can’t figure out what process is trying to connect? In this blog post, we are going to walk through one method to determine what process is failing to connect to DSE by leveraging the auditd framework.

March 22, 2018 • By: Thanh Tran

There is a big improvement in DSE v5.1.6 that makes it much easier to debug LDAP authentication issues compared to earlier versions of DSE.  Here, we will look at using the DSE v5.1.6 improvement to debug LDAP authentication.  We will also talk about LDAP authentication debugging methods to use with older versions of DSE.

February 07, 2018 • By: Ben Krug

In Cassandra, data isn’t deleted in the same way it is in RDBMSs. Cassandra is designed for high write throughput, and avoids reads-before-writes. It uses sstables, which are immutable once written. So, a delete is actually an update, and updates are actually inserts (into new sstables). A “tombstone” marker is written to indicate that the data is now (logically) deleted. 

February 05, 2018 • By: Gregory Smith

Since DSE 4.8, DataStax Enterprise has leveraged logback for all logging. Logback has many advantages over the older log4j logging project, one of the main benefits is the ability to change the logging configuration dynamically, without the need to restart the DSE software. This is particularly useful in a production environment where obtaining permission to restart production nodes may not be possible.