Thanks. Sean ________________________________ From: Alexander Dejanovski [a...@thelastpickle.com] Sent: Monday, October 24, 2016 10:39 AM To: user@cassandra.apache.org Subject: Re: incremental repairs with -pr flag?
Hi Sean, In order to mitigate its impact, anticompaction is not fully executed when incremental repair is run with -pr. What you'll observe is that running repair on all nodes with -pr will leave sstables marked as unrepaired on all of them. Then, if you think about it you realize it's no big deal as -pr is useless with incremental repair : data is repaired only once with incremental repair, which is what -pr intended to fix on full repair, by repairing all token ranges only once instead of times the replication factor. Cheers, Le lun. 24 oct. 2016 18:05, Sean Bridges <sean.brid...@globalrelay.net<mailto:sean.brid...@globalrelay.net>> a écrit : Hey, In the datastax documentation on repair [1], it says, "The partitioner range option is recommended for routine maintenance. Do not use it to repair a downed node. Do not use with incremental repair (default for Cassandra 3.0 and later)." Why is it not recommended to use -pr with incremental repairs? Thanks, Sean [1] https://docs.datastax.com/en/cassandra/3.x/cassandra/operations/opsRepairNodesManualRepair.html -- Sean Bridges senior systems architect Global Relay sean.brid...@globalrelay.net <mailto:sean.brid...@globalrelay.net> 866.484.6630 New York | Chicago | Vancouver | London (+44.0800.032.9829) | Singapore (+65.3158.1301) Global Relay Archive supports email, instant messaging, BlackBerry, Bloomberg, Thomson Reuters, Pivot, YellowJacket, LinkedIn, Twitter, Facebook and more. Ask about Global Relay Message<http://www.globalrelay.com/services/message> - The Future of Collaboration in the Financial Services World All email sent to or from this address will be retained by Global Relay's email archiving system. This message is intended only for the use of the individual or entity to which it is addressed, and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. Global Relay will not be liable for any compliance or technical information provided herein. All trademarks are the property of their respective owners. -- ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com<http://www.thelastpickle.com/>
