cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alain RODRIGUEZ <>
Subject Re: How to measure the write amplification of C*?
Date Thu, 10 Mar 2016 11:42:30 GMT
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 ( 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.

Alain Rodriguez -

The Last Pickle - Apache Cassandra Consulting

2016-03-10 7:18 GMT+01:00 Dikang Gu <>:

> 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

View raw message