Optimizing IOPS during sequential I/O (compactions)

2016-06-19 Thread Mike Heffner
Hi, I'm curious to know if anyone has attempted to improve read IOPS performance during sequential I/O operations (largely compactions) while still maintaining read performance for small row, random-access client reads? Our use case is very high write load to read load ratio with rows that are sm

Re: New Cassandra PMC members and committers

2016-06-19 Thread Giampaolo Trapasso
Congrats! :) giampaolo 2016-06-16 22:11 GMT+02:00 Jonathan Ellis : > The Apache Cassandra PMC would like to welcome its newest members. In > alphabetical order, these are Aaron Morton, Dave Brosius, and Tyler Hobbs. > > We would also like to welcome new committer Jeff Jirsa, author of TWCS. > >

Schema Disagreement vs Nodetool resetlocalschema

2016-06-19 Thread Michael Fong
Hi, We have recently encountered several schema disagreement issue while upgrading Cassandra. In one of the cases, the 2-node cluster idled for over 30 minutes and their schema remain unsynced. Due to other logic flows, Cassandra cannot be restarted, and hence we need to come up an alternative