Yasir,
How many nodes are in the cluster? What is num_tokens set to in the Cassandra.yaml file? Is it just this one node doing this? What replication factor do you use that affects the ranges on that disk? Kenneth Brotman From: Kyrylo Lebediev [mailto:kyrylo_lebed...@epam.com] Sent: Friday, March 09, 2018 4:14 AM To: user@cassandra.apache.org Subject: Re: uneven data movement in one of the disk in Cassandra 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. On Fri, Mar 9, 2018 at 3:47 PM, Oleksandr Shulgin <oleksandr.shul...@zalando.de> wrote: On Fri, Mar 9, 2018 at 11:40 AM, Yasir Saleem <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
