Re: Replacing a Cassandra node in K8S

2020-07-28 Thread John Sanda
The Cassandra pod will get scheduled to run on a different worker node, provided there is an available node that satisfies affinity rules, resource requirements, etc. And you are correct that the volume will get remounted. If however you are using a local or hostPath volume, then it will be lost an

Re: Replacing a Cassandra node in K8S

2020-07-28 Thread manish khandelwal
Thanks John for the answer. Regards Manish On Tue, Jul 28, 2020 at 11:39 PM John Sanda wrote: > The Cassandra pod will get scheduled to run on a different worker node, > provided there is an available node that satisfies affinity rules, resource > requirements, etc. And you are correct that the

Multi DCs vs Single DC performance

2020-07-28 Thread onmstester onmstester
Hi, Logically, i do not need to use multiple DCs(cluster is not geographically separated), but i wonder if splitting the cluster to two half (two separate dc) would decrease overhead of node ack/communication and result in better (write) performance? Sent using https://www.zoho.com/mail/

Re: Multi DCs vs Single DC performance

2020-07-28 Thread Jeff Jirsa
PROBABLY not, unless you've got a very very clever idea of using local consistency levels or somehow taking advantage of write forwarding in a way I havent personally figured out yet (maybe if you had a very high replica count per DC, then using forwarding and EACH_QUORUM may get fun, but you'd be

Re: Multi DCs vs Single DC performance

2020-07-28 Thread onmstester onmstester
Thanks for your immediate and clear response, Jeff Sent using https://www.zoho.com/mail/ On Wed, 29 Jul 2020 08:00:33 +0430 Jeff Jirsa wrote PROBABLY not, unless you've got a very very clever idea of using local consistency levels or somehow taking advantage of write forwarding