Scylla in EC2 EC2 load high

[huang]

I have 10 node scylla-cluster，5 of these nodes are newly joined scylla-cluster ，but 5new node High load，5 old node load is normal

[Guy]

Please share more details, things like:

• Platform (physical/VM/cloud instance type/docker):
• Hardware: sockets= cores= hyperthreading= memory=
• Disks: (SSD/HDD, count)
• Scylla version (or git commit hash):
• Cluster size:
• OS (RHEL/CentOS/Ubuntu/AWS AMI):
• The data model
• What was the motivation for adding the additional nodes?

[huang]

Platform：AWS-i3.4xlarge
Hardware:16C 122G
Disks：raid0 3.8T
Scylla-version:5.2.2
OS:centos7.5
RF：3

In the beginning have 5 node ，and than add 5new node in scylla-cluster, but only new node have high load and always play compaction very frequent.
just like：

[huang]

avg ops 12k , max 30k

[Israel_Fruchter]

@huang can you clarify what is the graph it’s operation per sec ?

which clients are used ? java / python / rust ? are those scylla ones ? what are there versions ?

something is unbalanced, and for understand the cause we’ll need much more information about the load, we’ll need the schema, and the few example of the typical queries being done.

I think ScyllaDB University | Basic & Advanced Data Modeling goes into some details of how the schema should be built

[huang]

clients:JAVA
scylla version：all node is 5.2.2

like this?

[Guy]

More details are needed to understand what’s going on, things like:

• Schema used
• Installation details (ScyllaDB version, cluster size, OS)
• Hardware details: Platform (physical/VM/cloud instance type/docker), sockets= cores= hyperthreading= memory=, Disks (SSD/HDD, count)

@Israel_Fruchter

which clients are used ? java / python / rust ? are those scylla ones ? what are there versions ?