Hi Dikang, I am not sure about what you call "amplification", but as sizes highly depends on the structure I think I would probably give it a try using CCM ( https://github.com/pcmanus/ccm) or some test cluster with 'production like' setting and schema. You can write a row, flush it and see how big is the data cluster-wide / per node.
Hope this will be of some help. C*heers, ----------------------- Alain Rodriguez - al...@thelastpickle.com France The Last Pickle - Apache Cassandra Consulting http://www.thelastpickle.com 2016-03-10 7:18 GMT+01:00 Dikang Gu <dikan...@gmail.com>: > Hello there, > > I'm wondering is there a good way to measure the write amplification of > Cassandra? > > I'm thinking it could be calculated by (size of mutations written to the > node)/(number of bytes written to the disk). > > Do we already have the metrics of "size of mutations written to the node"? > I did not find it in jmx metrics. > > Thanks > > -- > Dikang > >
