Repair corrupt SSTable from power outage?

I have a 25 node cluster and we lost power on one of the racks last night and now 6 of our nodes will not start up and we are getting the following error: INFO [main] 2015-10-01 10:19:22,111 CassandraDaemon.java:122 - JMX is enabled to receive remote connections on port: 7199 INFO [main] 2015-10

Re: Repair corrupt SSTable from power outage?

sfully. >> >> I restarted my nodes with disk failure policy "best_effort", then I run >> the "nodetool scrub " >> >> Once done I removed the corrupt tables manually and started repair >> >> >> On Thu, Oct 1, 2015 at 7:27 PM, John Anderson wr

Reading hundreds of thousands of rows at once?

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 pro

Data Modeling help for representing a survey form.

I have an existing system in postgres that I would like to move to cassandra. The system is for building registration forms for conferences. For example, you might want to build a registration form (or survey) that has a bunch of questions on it. An overview of this system I whiteboarded here: h