Re: Inter Data Center Latency calculation of a Multi DC cluster running in AWS

(https://www.cloudping.co/ is a useful place to get inter-region latency in AWS) On Tue, Oct 17, 2017 at 9:20 PM, Chris Lohfink wrote: > An alternative if using >3.8 you can use the org.apache.cassandra. > metrics:type=Messaging,name=[DC]-Latency mbean where [DC] is the

Re: Inter Data Center Latency calculation of a Multi DC cluster running in AWS

An alternative if using >3.8 you can use the org.apache.cassandra.metrics:type=Messaging,name=[DC]-Latency mbean where [DC] is the name of the DC and you can get the inter DC latency per node (to that node). This does not account for NTP drift though, just how long it takes messages (ie mutations)

3.0 is slower than 2.2 ?

Hi all, I'm comparing performance between Cassandra 2.2.10 and 3.0.15. SELECT of 3.0.15 is faster than 2.2.10. However, conditional INSERT and UPDATE of 3.0.15 are slower than 2.2.10. Is it expected? If so, I want know why. I'm trying to measure performance for non-conditional operation next.

Re: Restore cassandra snapshots

Hi Anthony I did the following steps to restore. Please let me know if I missed something. - Took snapshots on the 3 nodes of the existing cluster simultaneously - copied that snapshots respectively on the 3 nodes of the freshly created cluster - ran sstableloader on each of the application

Re: Inter Data Center Latency calculation of a Multi DC cluster running in AWS

I recommend figuring out the latency between your datacenters. Cassandra isn’t going to be any more than that barring JVM pauses on the remote coordinator. > On Oct 17, 2017, at 4:17 PM, Bill Walters wrote: > > Hi Everyone, > > I need some suggestions on finding the

Re: Restore cassandra snapshots

Hi Pradeep, If you are going to copy N snapshots to N nodes you will need to make sure you have the System keyspace as part of that snapshot. The System keyspace that is local to each node, contains the token allocations for that particular node. This allows the node to work out what data it is

Inter Data Center Latency calculation of a Multi DC cluster running in AWS

Hi Everyone, I need some suggestions on finding the time taken for Cassandra replication to happen from east to west region for write and read operations on a multi DC cluster. Currently, below is our cluster setup. *Cassandra version:* DSE 5.0.7 *No of Data centers:* 2 (AWS East and AWS West

Re: Looking for advice and assistance upgrading from Cassandra 1.2.9

+1 what Jon said On 18 Oct. 2017 06:38, "Jon Haddad" wrote: > I recommend going all the way to 2.2. > > On Oct 17, 2017, at 12:37 PM, Jeff Jirsa wrote: > > You’ll go from 1.2 to 2.0 to 2.1 - should be basic steps: > - make sure you have all 1.2 sstables by

where can i buy cassandra spring applications

where can i buy cassandra spring applications, I need to purchase a fully built Cassandr Web Application in Eclipse, Where Can I get one? - Forexample on Evanto Market , and Theme Forest I ca get WordPress, Drupal, PHP and other systems, Where can I get Spring Cassandra Applications

Re: Looking for advice and assistance upgrading from Cassandra 1.2.9

I recommend going all the way to 2.2. > On Oct 17, 2017, at 12:37 PM, Jeff Jirsa wrote: > > You’ll go from 1.2 to 2.0 to 2.1 - should be basic steps: > - make sure you have all 1.2 sstables by running upgradesstable > - one node at a time, swap the 1.2 binaries for latest in

Re: Looking for advice and assistance upgrading from Cassandra 1.2.9

You’ll go from 1.2 to 2.0 to 2.1 - should be basic steps: - make sure you have all 1.2 sstables by running upgradesstable - one node at a time, swap the 1.2 binaries for latest in 2.0 - once all nodes are 2.0, run upgradesstables on each node (one at a time) - one node at a, swap the 2.0 binaries

Looking for advice and assistance upgrading from Cassandra 1.2.9

I have a large Cassandra 1.2.9 based enterprise application with a considerable amount of data. I’d like to begin the process of upgrading my existing java application and the database to Cassandra 2.1. Anyone have some suggestions where to begin? Any experts looking for some consulting

Re: How can I install a Java Spring Application running Cassandra on to AWS

Thank YOU On 10/17/17, Who Dadddy wrote: > http://lmgtfy.com/?q=install+java+app+on+AWS > > >> On 17 Oct 2017, at 15:32, Lutaya Shafiq Holmes >> wrote: >> >> How can I install a Java Spring Application

Re: How can I install a Java Spring Application running Cassandra on to AWS

http://lmgtfy.com/?q=install+java+app+on+AWS > On 17 Oct 2017, at 15:32, Lutaya Shafiq Holmes wrote: > > How can I install a Java Spring Application running Cassandra on to AWS > -- > Lutaaya Shafiq > Web: www.ronzag.com

How can I install a Java Spring Application running Cassandra on to AWS

How can I install a Java Spring Application running Cassandra on to AWS -- Lutaaya Shafiq Web: www.ronzag.com | i...@ronzag.com Mobile: +256702772721 | +256783564130 Twitter: @lutayashafiq Skype: lutaya5 Blog: lutayashafiq.com http://www.fourcornersalliancegroup.com/?a=shafiqholmes "The most

Re: Elastic IP for Cassandra in AWS

+1 Scaling up & down can also take some time (multiple days even) if the nodes in the cluster hold a lot of data. The process has a performance impact on the cluster, as the rest of the cluster must stream data to the new nodes, or stream data away from the decommissioning nodes, also usually

Re: Elastic IP for Cassandra in AWS

On Tue, Oct 17, 2017 at 7:40 AM, Jeff Jirsa wrote: > Just to expand on this: > > In an asg environment, you could have an autoscaling event to expand or > shrink the cluster and multiple nodes terminate at the same time. Your > userdata or your AMI would have to know how to