[ https://issues.apache.org/jira/browse/CASSANDRA-1404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yuki Morishita updated CASSANDRA-1404: -------------------------------------- Attachment: 1404-1.1.txt You are right. There is no need to halve since we are actually calculating the exact size of cleanup'ed sstable. > Improve pre-cleanup estimate of disk space required > --------------------------------------------------- > > Key: CASSANDRA-1404 > URL: https://issues.apache.org/jira/browse/CASSANDRA-1404 > Project: Cassandra > Issue Type: Improvement > Components: Core > Reporter: Stu Hood > Assignee: Yuki Morishita > Priority: Minor > Fix For: 1.1.1 > > Attachments: 1404-1.1.txt > > > Compaction sums the sizes of all ranges to estimate the output size in order > to pick a target drive. Anti-compactions directly drop ranges from sstables, > and the volume of data dropped can easily be calculated using the SSTable > index. Using this knowledge in our estimate in > ColumnFamilyStore.getExpectedCompactedFileSize would allow 'nodetool cleanup' > to run when less than 50% of disk is available, in the case where ranges are > being dropped (post node-move). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira