Re: Sizing a cluster

2019-10-01 Thread jagernicolas
Hi Léo thax for the links, Is that the size of the uncompressed data or the data once it has been inserted and compressed by cassandra ?The size of 0.5MB is the size of the data we sent, before cassandra do compression if any. Looking at the cassandra compression : http://cassandra.apa

Re: Sizing a cluster

2019-10-01 Thread Léo FERLIN SUTTON
Hi ! I'm not an expert but don't forget that cassandra needs space to do it's compactions. Take a look at the worst case scenarios from this datastax grid : https://docs.datastax.com/en/dse-planning/doc/planning/capacityPlanning.html#capacityPlanning__disk > The size of a picture + data is about

Sizing a cluster

2019-10-01 Thread jagernicolas
Hi, We want to use Cassandra to store camera detection. The size of a picture + data is about 0.5MB. We starting with 5 devices, but we targeting 50 device for the next year, and could go up to 1000. I summary everything , * Number of sources: 5 - 50 - 1000 (src) * Frequency o