How to capture Block Size stats on a datastore?

[romatlo]

Hello folks,

I am running IOMETER on some Win7 VMs with disks attached to them from NFS datastores I have created.

The iometer tests and running fine, but being asked to confirm the block size of the iometer workload to the datastores.

My iometer test parameters define a 4K block size for IO transfers to the datastores.

I am using esxtop and looking at option U for disk devices and BLKSZ, but shows no data on live display and does not export to my .csv (using batch interval capture method).

Anyone have a suggestion for how I could verify or calculate the block size of IO transfers?

Thanks,

romatlo

[Serismiscool]

Romatlo,

Instead of usingesxtop have you tried looking intovscsistats to get those statistics.

Below are two very good resources for using vscsistats.

-Using vscsiStats for Storage Performance Analysis

https://communities.vmware.com/docs/DOC-10095

-Cormac Hogan (Getting started withvscsiStats)

http://cormachogan.com/2013/07/10/getting-started-with-vscsistats/

Thanks,

-Ish

[romatlo]

Thank you for responding!  This looks great.

I testing now how to get the IO size for specific VMs.

I wondering how to capture these stats for a datastore.

Would you know?