topic FAS 8060 c-mode throughput issue in ONTAP Hardware

FAS 8060 c-mode throughput issue

ckirim — Wed, 04 Jun 2025 20:36:54 GMT

Hi ,

I have a fas 8060 cluster 8.3.2 with FC connection LACP 10 g. By the client side we use Ubuntu 14.4 NFS shares. When I test my connection with fio performance test the iops and disk IO workloads I have low througputs than I had expected. I have attached the outputs from sysstat -x , port utilizations and perfstat during the process to the message.

I have 800-900 mb/s with 1 client and 1100-1200 mb/s with 2 client connections. But this values has decreased dramatically to 500-600 mb/s in a few minutes. I am not waiting 2gb/s

throughput but this values is unacceptable. I have already checked the switch,cabling,etc. but I didn't find any solution. I have moved the volume to SAS and SSD but I have the same result.

Can someone help me? I dont know was I will exact looking or testing?

thanks!

Re: FAS 8060 c-mode throughput issue

MarcSchindler — Fri, 03 Jun 2016 13:24:27 GMT

Hello,

I don't see any attachments on your post.

Please give us more information:

- What is the output of following command during the performance reduction?

::> set advanced

::> dashboard performance show

node shell: "sysstat -x 1", "sysstat -m 1" and "sysconfig -r"

--- change nfsv3 to nfsv4 if you use nfsv4

- Do you have one lif per node ?

- How much volumes and aggregates do you use for the test ? (disk type, disk count)

- Any flash accelerator in use ?

- FIO config files

Best regards

Re: FAS 8060 c-mode throughput issue

ckirim — Mon, 06 Jun 2016 06:43:33 GMT

Hi,

Now we have extra workloads on the System like CIFS share etc. I can provide the outputs of commands but I think that will not help to you.

I have attached the logs,when the problem has first time appeared. I have already tried to change to nfs version, but it didn't help.

Re: FAS 8060 c-mode throughput issue

MarcSchindler — Tue, 07 Jun 2016 14:02:00 GMT

Hi,

The most interesting information will be:

- the layout of the aggregates (output: sysconfig -r)

- the count of volumes and aggregates per node which are used for the tests (parallelization is important, because of the many cores...)

- how much transfers from how much server and how long

- output fio config file to know the workload & statistics show-periodic

- is it a synthetic workload or a real life workload ?

- "... but this values is unacceptable" What did you expect ?

Please also open a case and call your partner to recheck the tests.

Best regards