Re: Optimizing for connections

[Eric Stevens]

RE #2, some have had good results from having coordinator-only nodes:
https://www.slideshare.net/DataStax/optimizing-your-cluster-with-coordinator-nodes-eric-lubow-simplereach-cassandra-summit-2016

Assuming finite resources, it might be better to be certain you have good
token awareness in your application and use those extra nodes in the main
cluster, however.

On Fri, Dec 21, 2018 at 12:34 AM Rahul Singh 
wrote:

> See inline
>
> Rahul Singh
> Chief Executive Officer
> m 202.905.2818 <(202)%20905-2818>
>
> Anant Corporation
> 1010 Wisconsin Ave NW, Suite 250
> 
> Washington, D.C. 20007
> 
>
> We build and manage digital business technology platforms.
> On Dec 9, 2018, 2:02 PM -0500, Devaki, Srinivas ,
> wrote:
>
> Hi Guys,
>
> Have a couple of questions regarding the connections to cassandra,
>
> 1. What are the recommended number of connections per cassandra node?
>
>
> Depends on hardware.
>
> 2. Is it a good idea to create coordinator nodes(with `num_token: 0`) and
> whitelisting only those hosts from client side? so that I can isolate main
> worker don't need to work on connection threads
>
>
> Defeats the purpose of having a masterless system.
>
> 3. does the request time on client side include connect time?
>
>
> Who is measuring?
>
>
> 4. Is there any hard limit on number of connections that can be set on
> cassandra?
>
>
>
> Read :
> https://stackoverflow.com/questions/33562374/cassandra-throttling-workload
>
> Thanks a lot for your help
>
>

Re: Optimizing for connections

[Rahul Singh]

See inline

Rahul Singh
Chief Executive Officer
m 202.905.2818

Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007

We build and manage digital business technology platforms.
On Dec 9, 2018, 2:02 PM -0500, Devaki, Srinivas , wrote:
> Hi Guys,
>
> Have a couple of questions regarding the connections to cassandra,
>
> 1. What are the recommended number of connections per cassandra node?

Depends on hardware.

> 2. Is it a good idea to create coordinator nodes(with `num_token: 0`) and 
> whitelisting only those hosts from client side? so that I can isolate main 
> worker don't need to work on connection threads

Defeats the purpose of having a masterless system.

> 3. does the request time on client side include connect time?

Who is measuring?


> 4. Is there any hard limit on number of connections that can be set on 
> cassandra?
>

Read : 
https://stackoverflow.com/questions/33562374/cassandra-throttling-workload

> Thanks a lot for your help
>

Optimizing for connections

[Devaki, Srinivas]

Hi Guys,

Have a couple of questions regarding the connections to cassandra,

1. What are the recommended number of connections per cassandra node?
2. Is it a good idea to create coordinator nodes(with `num_token: 0`) and
whitelisting only those hosts from client side? so that I can isolate main
worker don't need to work on connection threads
3. does the request time on client side include connect time?
4. Is there any hard limit on number of connections that can be set on
cassandra?

Thanks a lot for your help