Re: Cassandra Splitting databases
Dor Laor, I like your approach. If I restrict the replication factor of a keyspace to on premise data center and another to azure and attempt to split the cluster? Do you have some documentation I can refer to ? Regards R1J1 On Fri, Jan 4, 2019 at 5:32 PM Dor Laor wrote: > Not sure I understand correctly but if you have one cluster with 2 > separate datacenters > you can define keyspace A to be on premise with a single DC and keyspace B > only on Azure. > > > On Fri, Jan 4, 2019 at 2:23 PM R1 J1 wrote: > >> We currently have 2 databases (A and B ) on a 6 node cluster. >> 3 nodes are on premise and 3 in azure. I want database A to live on >> onpremise cluster and I want Database B to stay in the Azure. I want to >> then split the cluster into 2 clusters one onpremise (3 node ) having >> Database A and other in Azure (3 node ) having Database B. >> >> How do we accomplish such a split ? >> >> >> Regards >> R1J1 >> >
Cassandra Splitting databases
We currently have 2 databases (A and B ) on a 6 node cluster. 3 nodes are on premise and 3 in azure. I want database A to live on onpremise cluster and I want Database B to stay in the Azure. I want to then split the cluster into 2 clusters one onpremise (3 node ) having Database A and other in Azure (3 node ) having Database B. How do we accomplish such a split ? Regards R1J1
Re: How to downloading Cassandra 3.11.0 and 3.11.2 binaries for ubuntu
Kyrylo Lebediev , This worked thanks :-) wget http://dl.bintray.com/apache/cassandra/pool/main/c/cassandra/cassandra_3.11.2_all.deb sudo dpkg -i cassandra_3.11.2_all.deb R1J1 On Sat, Aug 4, 2018 at 12:19 PM, Kyrylo Lebediev < kyrylo_lebed...@epam.com.invalid> wrote: > Go to: http://dl.bintray.com/apache/cassandra/pool/main/c/cassandra/ > download deb packages for the versions you need and install them by dpkg. > > Regards, > Kyrill > ------ > *From:* R1 J1 > *Sent:* Saturday, August 4, 2018 4:56:56 PM > *To:* user@cassandra.apache.org > *Subject:* How to downloading Cassandra 3.11.0 and 3.11.2 binaries for > ubuntu > > What are the steps to download the Cassandra 3.11.0 and 3.11.2 binaries > for ubuntu ? > > If we follow the steps below they give 3.11.3 binaries but need slightly > older > > http://cassandra.apache.org/download/ > > echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo > tee -a /etc/apt/sources.list.d/cassandra.sources.list > > > > curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add - > > > > sudo apt-get update > > > > sudo apt-get install cassandra > > > Regards > R1J1 >
Apache Cassandra 3.11.3 Question
Can a cluster having 3.11.0 node(s) accept a 3.11.3 node as a new node for eventual migration and decom of older 3.11.0 nodes ? Can a cluster having 3.11.2(s) node accept a 3.11.3 node as a new node for eventual migration and decom of older 3.11.2 nodes ? Regards R1J1
How to downloading Cassandra 3.11.0 and 3.11.2 binaries for ubuntu
What are the steps to download the Cassandra 3.11.0 and 3.11.2 binaries for ubuntu ? If we follow the steps below they give 3.11.3 binaries but need slightly older http://cassandra.apache.org/download/ echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add - sudo apt-get update sudo apt-get install cassandra Regards R1J1
Re: optimization to cassandra-env.sh
Thank you Sean and Rahul for the consult On Sun, Jul 29, 2018 at 6:52 PM, Rahul Singh wrote: > Depends on which GC you are using but you can definitely manage GC - but > you will always be stuck to the upper limit of memory. > > I found the Hubspot gc visualizer and the associated blog post very > helpful in the past. > > *https://github.com/HubSpot/gc_log_visualizer/blob/master/README.md* > <https://github.com/HubSpot/gc_log_visualizer/blob/master/README.md> > > > > *https://product.hubspot.com/blog/g1gc-fundamentals-lessons-from-taming-garbage-collection* > <https://product.hubspot.com/blog/g1gc-fundamentals-lessons-from-taming-garbage-collection> > > Rahul > On Jul 26, 2018, 1:27 PM -0400, R1 J1 , wrote: > > Any one has tried to optimize or change cassandra-env.sh in an server > installation to make it use more heap size for garbage collection ? > Any ideas ? We are having some oom issues and thinking if we have options > other than increasing RAM for that node. > > Regards > >
optimization to cassandra-env.sh
Any one has tried to optimize or change cassandra-env.sh in an server installation to make it use more heap size for garbage collection ? Any ideas ? We are having some oom issues and thinking if we have options other than increasing RAM for that node. Regards
Re: cassandro nodes restarts
Thanks for your prompt replies. No the same node is not bouncing over. When you say it is about to tip over: What can we do to stop that ? Also about that error : you guys are correct: it is a warning and might not be contributing to the node bounce issue and it can be removed by changing batch_size_warn_threshold_in_kb: 5 R1J1 On Wed, Jul 25, 2018 at 10:32 PM, R1 J1 wrote: > cassandro nodes restarts > > > > we see errors typically like these > > > WARN [Native-Transport-Requests-3] 2018-07-25 20:51:38,520 > BatchStatement.java:301 - Batch for "keyspace.table" > is of size 19.386KiB, exceeding specified threshold of 5.000KiB by > 14.386KiB. > > > Regards > R1J1 >
cassandro nodes restarts
cassandro nodes restarts we see errors typically like these WARN [Native-Transport-Requests-3] 2018-07-25 20:51:38,520 BatchStatement.java:301 - Batch for "keyspace.table" is of size 19.386KiB, exceeding specified threshold of 5.000KiB by 14.386KiB. Regards R1J1
