Re: Question About Reaper

Do we have to setup the reaper on one of the node where Cassandra cluster is running? We are using a separate node where we have the connectivity to the Cassandra cluster . We have tried with the certificate settings in /usr/local/bin/cassandra-reaper We have put below in /usr/local/bin/cassandra

Re: Question About Reaper

looks like you're connecting to a service listening on SSL but you don't have the CA used in your truststore On Thu, May 24, 2018 at 1:58 PM, Surbhi Gupta wrote: > Getting below error: > > Caused by: sun.security.validator.ValidatorException: PKIX path building > failed: sun.security.provider.ce

Re: Question About Reaper

Getting below error: Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:397) at

Re: Question About Reaper

Another question, We use 9142 cqlsh port in one of the datacenter and on other datacenter we use 9042 port. How should we configure this ? On 24 May 2018 at 10:22, Surbhi Gupta wrote: > What is the impact of > PARALLEL - all replicas at the same time ? > Will it make repair faster,? > Do we expe

Re: Question About Reaper

What is the impact of PARALLEL - all replicas at the same time ? Will it make repair faster,? Do we expect more CPU , Load and memory usage in case if we use Parallel , compare to other settings ? On 21 May 2018 at 22:55, Alexander Dejanovski wrote: > You won't be able to have less segments th

Re: Question About Reaper

You won't be able to have less segments than vnodes, so just use 256 segments per node, use parallel as repair parallelism, and set intensity to 1. You apparently have more than 3TB per node, and that kind of density is always challenging when it comes to run "fast" repairs. Cheers, Le mar. 22 m

Re: Question About Reaper

We are on Dse 4.8.15 and it is cassandra 2.1. What are the best configuration to use for reaper for 144 nodes with 256 vnodes and it shows around 532TB data when we start opscenter repairs. We need to finish repair soon. On Mon, May 21, 2018 at 10:53 AM Alexander Dejanovski < a...@thelastpickle.c

Re: Question About Reaper

Hi Subri, Reaper might indeed be your best chance to reduce the overhead of vnodes there. The latest betas include a new feature that will group vnodes sharing the same replicas in the same segment. This will allow to have less segments than vnodes, and is available with Cassandra 2.2 and onwards

Re: Question About Reaper

Thanks Abdul On Mon, May 21, 2018 at 6:28 AM Abdul Patel wrote: > We have a paramater in reaper yaml file called > repairManagerSchrdulingIntervalSeconds default is 10 seconds , i tested > with 8,6,5 seconds and found 5 seconds optimal for my environment ..you go > down further but it will hav

Re: Question About Reaper

We have a paramater in reaper yaml file called repairManagerSchrdulingIntervalSeconds default is 10 seconds , i tested with 8,6,5 seconds and found 5 seconds optimal for my environment ..you go down further but it will have cascading effects in cpu and memory consumption. So test well. On Monday

Re: Question About Reaper

Thanks a lot for your inputs, Abdul, how did u tune reaper? On Sun, May 20, 2018 at 10:10 AM Jonathan Haddad wrote: > FWIW the largest deployment I know about is a single reaper instance > managing 50 clusters and over 2000 nodes. > > There might be bigger, but I either don’t know about it or ca

Re: Question About Reaper

FWIW the largest deployment I know about is a single reaper instance managing 50 clusters and over 2000 nodes. There might be bigger, but I either don’t know about it or can’t remember. On Sun, May 20, 2018 at 10:04 AM Abdul Patel wrote: > Hi, > > I recently tested reaper and it actually helped

Re: Question About Reaper

Hi, I recently tested reaper and it actually helped us alot. Even with our small footprint 18 node reaper takes close to 6 hrs.. But it really depends on number nodes. For example if you have 4 nodes then it runs on 4*256 =1024 segements , so for your env. Ut will be 256*144 close to 36k segements

Question About Reaper

Hi, We have a cluster with 144 nodes( 3 datacenter) with 256 Vnodes . When we tried to start repairs from opscenter then it showed 1.9Million ranges to repair . And even after doing compaction and strekamthroughput to 0 , opscenter is not able to help us much to finish repair in 9 days timeframe .