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Jonathan Ellis commented on CASSANDRA-5220: ------------------------------------------- I just talked to some people who were seeing an 8 node (256 vnodes each) repair with about 1GB/node take *two days*. I would suggest doing some more digging to see where all the overhead is coming from, before guessing at solutions. > Repair improvements when using vnodes > ------------------------------------- > > Key: CASSANDRA-5220 > URL: https://issues.apache.org/jira/browse/CASSANDRA-5220 > Project: Cassandra > Issue Type: Improvement > Components: Core > Affects Versions: 1.2.0 beta 1 > Reporter: Brandon Williams > Assignee: Yuki Morishita > Labels: performance, repair > Fix For: 2.1 beta2 > > > Currently when using vnodes, repair takes much longer to complete than > without them. This appears at least in part because it's using a session per > range and processing them sequentially. This generates a lot of log spam > with vnodes, and while being gentler and lighter on hard disk deployments, > ssd-based deployments would often prefer that repair be as fast as possible. -- This message was sent by Atlassian JIRA (v6.2#6252)