[graffitici]

Why do people use C* in addition to ES? It seems like in this case most of the data could directly be piped into ES?

I understand that ES can lose data, or have some data storage problems, but one could just as well store all the incoming data on Hadoop or so, without having to bother with C*, no?

[itayadler]

C* makes it much easier to manage a cluster of Solr as the data grows (specifically with DSE), as with the tight integration you get all the benefits of C*. (HA, eventual consistency, multi-dc replication..)