How tsidxWritingLevel affects storage size and performance
Today we want to have a look at an index parameter and how it is affecting storage size and performance. In indexes.conf.spec you find the parameter tsidxWritingLevel. This parameters will configure how splunk creates index files over your rawdata within a bucket. The parameter was introduced in v7.2 and updated in v7.3 and v8.1. This also sets the minimum splunk version for a bucket index, meaning you will not be able to read buckets created on v8.1 with level 4 on a v8.0 system.