Re: Elastic IP for Cassandra in AWS

How can we solve EIP allocation using APIs for multiple nodes that are in one ASG? What are the config management tools that you are referring to? On Mon, Oct 16, 2017 at 9:23 PM, kurt greaves wrote: > AWS API's provide the functionality to allocate and associate elastic

Elastic IP for Cassandra in AWS

We are working on automation framework to build new C* ring in AWS and looking for suggestions to determine ways to automatically allocate EIP/public IP during new cluster build and scale up/replace node situations. We are using elastic IP/public ip for broadcast address and private IP for

AWS Cassandra backup/Restore tools

AWS Backup/Restore process/tools for C*/DSE C*: Has anyone used Opscenter 6.1 backup tool to backup/restore data for larger datasets online ? If yes, did you run into issues using that tool to backup/restore data in PROD that caused any performance or any other impact to the cluster? If no,

DSE 5.0 Upgrade

Team, 1. What is the stable version for DSE 5.0 to upgrade from DSE 4.8.x? 2. Is anybody switched to using DSE Unified auth model which enfores to use one auth policy as primary and other secondary? 3. Do I need to use multi-auth/DSE Unified auth for me upgrade to DSE 5.0 or higher? Our old

Cassandra on Cloud platforms experience

I would like to hear from the community on their experiences or lesson learnt on hosting Cassandra in cloud platforms like 1. Google Cloud Platform 2. AWS 3. Azure 1. Which cloud hosting is better and Why? 2. What differences of C* over vendor provided NoSQL DB like (Bigtable, Dynamo,Azure

Replication time across regions in AWS

Has anybody tested time taken to replicate data across regions between us-east and west or AZ in AWS? Few docs/blogs says its in few 10s of millisecs. Please can you provide your insights. Also is there a way to measure the time lag.

Re: Switching to Vnodes

vnodes creates a lot of small >tables and does a lot more work than streaming without vnodes > 3. Not necessarily >4. See #2 > > > From: cass savy > Reply-To: "user@cassandra.apache.org" > Date: Wednesday, December 9, 2015 at 1:26 PM > To: &qu

Replication lag between data center

How can we determine/measure the replication lag or latency between on premise data centers or cross region/Availability zones?

Write/read heavy usecase in one cluster

How do you determine if we can share cluster in prod for 2 different applications 1. Has anybody shared cluster in prod a write heavy use case that captures user login info (few 100 rpm) and hardly performs few reads per day and Use case that is read heavy use case that is 92% read with 10k

Switching to Vnodes

We want to move our clusters to use Vnodes. I know the docs online say we have to create new DC with vnodes and move to new dC and decommission old one. We use DSE for our c* clusters.C* version is 2.0.14 1. Is there any other way to migrate existing nodes to vnodes? 2. What are the known issues

Re: Switching to Vnodes

; and in total and how many nodes? > > On Wed, Dec 9, 2015 at 4:26 PM, cass savy <casss...@gmail.com> wrote: > >> We want to move our clusters to use Vnodes. I know the docs online say we >> have to create new DC with vnodes and move to new dC and decommission old >>

Re: Nodetool rebuild on vnodes enabled

add new DC and had to rebuild data 4. I have 2 DC, one with only cassandra, other new DC with cassandra and spark and with vnodes On Tue, Nov 17, 2015 at 4:29 PM, Robert Coli <rc...@eventbrite.com> wrote: > On Tue, Nov 17, 2015 at 3:24 PM, cass savy <casss...@gmail.com> wrote: >

C*1.2 on JVM 1.7

Has anybody run DSE 3.2.6(C*1.2.16) on JRE 1.7. I know its recommended that we have to get to JVM version 7 to get to C*2.0 and higher. We are experiencing latency issues during rolling upgrade from 1.2 to 2.0. Hence cannot get o C*1.2, but plan to just upgrade JRE from 1.6 to 1.7. I wanted to

Leap sec

Just curious to know on how you are preparing Prod C* clusters for leap sec. What are the workaorund other than upgrading kernel to 3.4+? Are you upgrading clusters to Java 7 or higher on client and C* servers?

Re: Leap sec

Are you suggesting the JDK 7 for client/driver and c* side as well. We use Java driver 2.1.4 and plan to goto JDK7u80 on application end. In addition, do I also have to upgrade to Java 7u60+ on C* servers as well. On Fri, May 15, 2015 at 1:06 PM, Jim Witschey jim.witsc...@datastax.com wrote:

Re: Cassandra install on JRE vs JDK

. Regards, Mark On 18 February 2015 at 19:49, cass savy casss...@gmail.com wrote: Can we install Oracle JDK instead of JRE in Cassandra servers? We have few clusters running JDK when we upgraded to C*2.0. Is there any known issue or impact with using JDK vs JRE? What is the reason to not use

Re: Cassandra install on JRE vs JDK

asking whether to use a non-Oracle JVM - the answer would be: use the Oracle JVM. OpenJDK might work, but I’d not recommend it. Am 18.02.2015 um 20:49 schrieb cass savy casss...@gmail.com: Can we install Oracle JDK instead of JRE in Cassandra servers? We have few clusters running JDK when we

Data tiered compaction and data model question

We want to track events in log Cf/table and should be able to query for events that occurred in range of mins or hours for given day. Multiple events can occur in a given minute. Listed 2 table designs and leaning towards table 1 to avoid large wide row. Please advice on *Table 1*: not very

Re: Better option to load data to cassandra

Sstableloader works well for large tables if you want to move data from Cassandra to Cassandra. This works if both C* are on the same version. Sstable2json and json2sstable is another alternative. On Nov 11, 2014 4:53 AM, srinivas rao pinnakasrin...@gmail.com wrote: Hi Team, Please suggest me

Upgrade to DSE 4.5

We run on DSE 3.1.3 and only use the Cassandra in prod cluster. What is the release that I need to be on right away. Because if I need to upgrade to DSE 4.5.c* 2.0.7. I need to take 3 paths to get there. I see lot of improvements for solr/Hadoop features in DSE 4.0 and above. Can I upgrade to

Re: Connection reset by peer error

, router, firewall, wan? __ Sent from iPhone On 1 Jul 2014, at 6:01 am, cass savy casss...@gmail.com wrote: We use Datastax Java driver version 1.0.6. Application is running into issues connecting to the 3 node cluster. What is cause for it? Application