You could also run tcpdump to inspect the streams.
Dinesh
On Thursday, August 16, 2018, 1:11:47 PM PDT, Elliott Sims
<elli...@backblaze.com> wrote:
Since this is cross-node traffic, "nodetool netstats" during the high-traffic
period should give you a better idea of what's being sent.
On Thu, Aug 16, 2018 at 2:34 AM, Behnam B.Marandi <behnam.b.mara...@gmail.com>
wrote:
In case of cronjobs, there is no jobs for that time period and I can see affect
of jobs like backups and repairs but traffic that they cause is not comparable.
Like 800MB comparing to 2GB. And for this case it is all outbound network on
all 3 cluster nodes.
On Thu, Aug 16, 2018 at 5:16 PM dinesh.jo...@yahoo.com.INVALID
<dinesh.jo...@yahoo.com. invalid> wrote:
Since it is predictable, can you check the logs during that period? What do
they say? Do you have a cron running on those hosts? Do all the nodes
experience this issue?
Dinesh
On Thursday, August 16, 2018, 12:02:55 AM PDT, Behnam B.Marandi
<behnam.b.mara...@gmail.com> wrote:
Actually I did. It seems this is a cross node traffic from one node to port
7000 (storage_port) of the other node.
On Sun, Aug 12, 2018 at 2:44 PM Elliott Sims <elli...@backblaze.com> wrote:
Since it's at a consistent time, maybe just look at it with iftop to see where
the traffic's going and what port it's coming from?
On Fri, Aug 10, 2018 at 1:48 AM, Behnam B.Marandi <behnam.b.mara...@gmail.com>
wrote:
I don't have any external process or planed repair in that time period.In case
of network, I can see outbound network on Cassandra node network interface but
couldn't find any way to check the VPC network to make sure it is not going out
of network. Maybe the only way is analysing VPC Flow Log.B.
On Tue, Aug 7, 2018 at 11:23 PM, Rahul Singh <rahul.xavier.si...@gmail.com>
wrote:
Are you sure you don’t have an outside process that is doing an export , Spark
job, non AWS managed backup process ?
Is this network out from Cassandra or from the network?
RahulOn Aug 7, 2018, 4:09 AM -0400, Behnam B.Marandi , wrote:
Hi,I have a 3 node Cassandra cluster (version 3.11.1) on m4.xlarge EC2
instances with separate EBS volumes for root (gp2), data (gp2) and commitlog
(io1).I get daily outbound traffic at a certain time everyday. As you can see
in the attached screenshot, whiile my normal networkl oad hardly meets 200MB,
this outbound (orange) spikes up to 2GB while inbound (purple) is less than
800MB.There is no repair or backup process giong on in that time window, so I
am wondering where to look. Any idea?
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