Re: uneven data movement in one of the disk in Cassandra

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

Re: uneven data movement in one of the disk in Cassandra

Yes it will helps,thanks James for correcting me > On Mar 9, 2018, at 9:52 PM, James Shaw 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,

Re: uneven data movement in one of the disk in Cassandra

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 wrote: > Yasir, > I think you

Re: uneven data movement in one of the disk in Cassandra

Ours have similar issue and I am working to solve it this weekend. Our case is because STCS make one huge table's sstable file bigger and bigger after compaction (this is STCS compaction nature, nothing wrong), even all most all data TTL 30days, but tombstones not evicted since largest file is

Re: uneven data movement in one of the disk in Cassandra

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 > 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

RE: uneven data movement in one of the disk in Cassandra

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]

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

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 > wrote: > >> Thanks, Nicolas Guyomar >> >> I am new to cassandra, here is the

Re: uneven data movement in one of the disk in Cassandra

On Fri, Mar 9, 2018 at 11:40 AM, Yasir Saleem 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 >

Re: uneven data movement in one of the disk in Cassandra

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 On Fri, Mar 9, 2018 at 3:33 PM, Nicolas Guyomar

Re: uneven data movement in one of the disk in Cassandra

Hi, This might be a compaction which is running, have you check that ? On 9 March 2018 at 11:29, Yasir Saleem wrote: > Hi Team, > > we are facing issue of uneven data movement in cassandra disk for > specific which disk03 in our case, however all the disk are