See https://github.com/apache/cassandra/blob/trunk/NEWS.txt#L173
SSTable data directory name is slightly changed. Each directory will have hex string appended after CF name, e.g. ks/cf-5be396077b811e3a3ab9dc4b9ac088d/ This hex string part represents unique ColumnFamily ID. Note that existing directories are used as is, so only newly created directories after upgrade have new directory name format. From: Donald Smith [mailto:donald.sm...@audiencescience.com] Sent: Wednesday, April 29, 2015 8:04 AM To: user@cassandra.apache.org Subject: Tables showing up as our_table-147a2090ed4211e480153bc81e542ebd/ in data dir Using 2.1.4, tables in our data/ directory are showing up as our_table-147a2090ed4211e480153bc81e542ebd/ instead of as our_table/ Why would that happen? We're also seeing lagging compactions and high cpu usage. Thanks, Don
