The version here really matters. If it’s higher than 3.2, it’s probably related to this issue which places sstables for a given range in the same directory to avoid data loss on single drive failure:
https://issues.apache.org/jira/browse/CASSANDRA-6696 -- Jeff Jirsa > On Mar 9, 2018, at 9:38 PM, Madhu B <odba.ma...@gmail.com> wrote: > > Yes it will helps,thanks James for correcting me > >> On Mar 9, 2018, at 9:52 PM, James Shaw <jxys...@gmail.com> wrote: >> >> per my testing, repair not help. >> repair build Merkle tree to compare data, it only write to a new file while >> have difference, very very small file at the end (of course, means most >> data are synced) >> >>> On Fri, Mar 9, 2018 at 10:31 PM, Madhu B <odba.ma...@gmail.com> wrote: >>> Yasir, >>> I think you need to run full repair in off-peak hours >>> >>> Thanks, >>> Madhu >>> >>> >>>> On Mar 9, 2018, at 7:20 AM, Kenneth Brotman <kenbrot...@yahoo.com.INVALID> >>>> wrote: >>>> >>>> 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. >>>> >>>> >>>> >>>> <image001.png> >>>> >>>> >>>> >>>> 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 >>>> >>>> >>>> >>>> >>>> >>
