Is there a SAS Viya utility to check disk performance inside a pod?

[EyalGonen]

Hi experts,

Is there a SAS Viya equivalent to this: https://service.sas.com/csm?sys_kb_id=2a2cc300470b56106a2d44c4236d43cf&id=kb_article_view&sysparm_ra... for checking disk performance?

I want to check disk performance for SAS OpenSearch pod but not sure how to accomplish it.

[gwootton]

This is not something available in the pods to perform I/O benchmarking, though I suspect what you want to do is measure the performance of the PVC that the SAS OpenSearch pod is using to store data (e.g. data-sas-opendistro-default-0). For cloud deployments the speed of the disk is usually based on the storage class and size. For example in my environment in Azure this PVC is 128GB and is a Standard SSD, so this should have performance of 500 IOPS and 100MB/s.
https://learn.microsoft.com/en-us/azure/virtual-machines/disks-types#standard-ssd-size

If you really wanted to measure the disk performance you could use something like this:

https://github.com/leeliu/dbench

This creates a job that mounts that PVC (or a PVC using the same storage class) and uses fio to measure it's performance.

[EyalGonen]

Hi @gwootton 

In my case this is an on-prem deployment not on cloud so I do not have the specs like they exist on Azure.

Wondering why SAS does not provide such a script like they used to for SAS 9.4.

[gwootton]

The scripts you've linked are not part of the SAS product, so are not included in any release. With on-prem deployments you would have access to the nodes directly so you could run the script on the node to measure performance.

[ronan]

Two ways to take this measurement, roughly speaking.

1. from the computer server pod shell, run a dd command targeting your mountpoint, generally SASWORK. 

2. create a benchmark IO testing code using a data step and/or some I/O intensive multithreaded procedure like a (threaded, by default) Proc sort.

https://studysas.blogspot.com/2024/08/optimizing-data-processing-with-multi.html 

Better still, if your deployment is on prem, you can ask assistance from you storage team to assess and test the disk performance of the device.

This unit testing should be completed by some capacity testing. As far as I remember, testio tools run multiple dd commands parallelised (by GNU parallel, I
 guess).