Add more nodes to your cluster On Apr 22, 2015, at 1:39 AM, John Anderson <son...@gmail.com<mailto:son...@gmail.com>> wrote:
Hey, I'm looking at querying around 500,000 rows that I need to pull into a Pandas data frame for processing. Currently testing this on a single cassandra node it takes around 21 seconds: https://gist.github.com/sontek/4ca95f5c5aa539663eaf I tried introducing multiprocessing so I could use 4 processes at a time to query this and I got it down to 14 seconds: https://gist.github.com/sontek/542f13307ef9679c0094 Although shaving off 7 seconds is great it still isn't really where I would like to be in regards to performance, for this many rows I'd really like to get down to a max of 1-2 seconds query time. What types of optimization's can I make to improve the read performance when querying a large set of data? Will this timing speed up linearly as I add more nodes? This is what the schema looks like currently: https://gist.github.com/sontek/d6fa3fc1b6d085ad3fa4 I'm not tied to the current schema at all, its mostly just a replication of what we have in SQL Server. I'm more interested in what things I can change to make querying it faster. Thanks, John
