Recently I had been asked to look at some performance issues on a bunch of VMs which were showing increased write latency. But how do you know where the VM is sending it’s I/O in such a distributed system? With VSAN the compute resource for a VM could be on one server where all I/O […]
Hi as I have had a lot of traffic for the 3PAR performance I have added a short video below on how to import and use the overall Array Performance views.
Hi as I have had a lot of traffic for the 3PAR performance I have added two videos below on how to setup the host and array views which covers hosts and volumes. When looking at the performance data for the volumes you may notice that these are spiking in nature this is down to […]
Just a quick plug really I am doing my presentation at the Scottish OUG on the 21st of this month. Agenda: http://www.oug.org/Scotland/Scotland2018/agenda.pdf Location: 21 June | Sheraton Grand Hotel, Edinburgh If you are coming along feel free to say Hi. Allan
In the previous post I showed how we can work out the QOS values from the average I/O size for a volume. In this post I will show a tool which was created to help monitor if a volume is at its QOS limit. As a quick reminder from the previous post if we look […]
In the previous post we saw two images one showing the QOS curve as advertised by the python API (image 1) and the other generated by a standalone python script (image 2) Image 1 Image 2 In this post I will cover how we worked out the cost for each I/O size and the associated […]
The SolidFire array is primarily used as an ISCSI target and allows for quality of service on a per volume basis. You can read more about it here. The purpose of these posts are to talk about the QOS functionality and how we can look to monitor this on the Arrays. Some Background.. Recently we […]