Re: Restarting nodes and reported load

[Daniel Steuernol]

The cluster is running with RF=3, right now each node is storing about 3-4 TB of data. I'm using r4.2xlarge EC2 instances, these have 8 vCPU's, 61 GB of RAM, and the disks attached for the data drive are gp2 ssd ebs volumes with 10k iops. I guess this brings up the question of what's a good marker to decide on whether to increase disk space vs provisioning a new node?

On May 29 2017, at 9:35 am, tommaso barbugli <tbarbu...@gmail.com> wrote:

Hi Daniel,

This is not normal. Possibly a capacity problem. Whats the RF, how much data do you store per node and what kind of servers do you use (core count, RAM, disk, ...)?

Cheers,

Tommaso

On Mon, May 29, 2017 at 6:22 PM, Daniel Steuernol <dan...@sendwithus.com> wrote:

I am running a 6 node cluster, and I have noticed that the reported load on each node rises throughout the week and grows way past the actual disk space used and available on each node. Also eventually latency for operations suffers and the nodes have to be restarted. A couple questions on this, is this normal? Also does cassandra need to be restarted every few days for best performance? Any insight on this behaviour would be helpful.

Cheers,

Daniel

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