To view the settings of an index run the following at the command-line… ?View Code BASHcurl -XGET http://hostname:9200/indexname/_settings From here you can indeify the setting you need and modify it as you wish. This example sets the number of replicas to zero. ?View Code BASHcurl -XPUT http://hostname:9200/indexname/_settings -d ‘{ "index": {"number_of_replicas":"0"}}’ For further details see […]

I’ve been playing with EFK and elasticsearch ended up eating all of the RAM on my test system. I discovered this was due to it attempting to cache all these indexes. Since this is a test system I’m not too bothered about having a long history here so I wrote this bash script to remove […]

Here is an updated version of the instructions given at Free Alternative to Splunk Using Fluentd. The installation was performed in CentOS 6.5. 1. Install ElasticSearch mkdir /opt/src cd /opt/src wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.2.1.noarch.rpm rpm -ivh elasticsearch-1.2.1.noarch.rpm /sbin/chkconfig –add elasticsearch service elasticsearch start # Move default file locations if required mkdir /data/elasticsearch mkdir /data/elasticsearch/data mkdir /data/elasticsearch/tmp mkdir /data/elasticsearch/logs […]

I’m working through some of the examples in this Hadoop book. I’m a little rusty on compiling java programs and had a little trouble with this one so I’m documenting it here for anyone else how might be having issues. Firstly, I tried compiling the examples like this; javac MaxTemperature.java That wasn’t too successful; MaxTemperature.java:3: […]

I was getting the following error when attempting to run hadoop version. The java class is not found: org.apache.hadoop.util.VersionInfo Unable to determine Hadoop version information. ‘hadoop version’ returned: The java class is not found: org.apache.hadoop.util.VersionInfo This was due to having the OpenJDK installed rather than the one from Sun/Oracle. To resolve this simply uninstall the […]