Not sure where I heard this, but AFAIK data imbalance when multiple data_directories are in use is a known issue for older versions of Cassandra. This might be the root-cause of your issue.
Which version of C* are you using? Unfortunately, don't remember in which version this imbalance issue was fixed. -- Kyrill ________________________________ From: Yasir Saleem <yasirsaleem9...@gmail.com> Sent: Friday, March 9, 2018 1:34:08 PM To: user@cassandra.apache.org Subject: Re: uneven data movement in one of the disk in Cassandra Hi Alex, no active compaction, right now. [cid:ii_jejv51ck1_1620a89ebd6c7e92] On Fri, Mar 9, 2018 at 3:47 PM, Oleksandr Shulgin <oleksandr.shul...@zalando.de<mailto:oleksandr.shul...@zalando.de>> wrote: On Fri, Mar 9, 2018 at 11:40 AM, Yasir Saleem <yasirsaleem9...@gmail.com<mailto:yasirsaleem9...@gmail.com>> wrote: Thanks, Nicolas Guyomar I am new to cassandra, here is the properties which I can see in yaml file: # of compaction, including validation compaction. compaction_throughput_mb_per_sec: 16 compaction_large_partition_warning_threshold_mb: 100 To check currently active compaction please use this command: nodetool compactionstats -H on the host which shows the problem. -- Alex
