Tuesday, October 6, 2015

ACID transactions with Apache Cassandra

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We started with cassandra in 2010. Now in 2014 we have Cassandra comprises much of our infrastructure and the data volume is growing fast there, e.g. in 2013 we stored about 80 terabytes of data in our largest cluster (it stores private messages of chats between users), and now in 2014 it stores about 130 terabytes.

We now have 27 clusters and about 500 Cassandra nodes in total. Total data stored in Cassandra is approximately 300 terabytes.

Most of these clusters are all our a branch of Cassandra, which I presented last year at Cassandra Summit Europe (Video & Slides). During the last year we were working hard on development of our new data storage solution, based on Cassandra 2.0. We were able to make a number of performance and stability improvements to 2.0 and even 2.1 codebases, and committed them back to the community, of course.

read more here

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