Author: Danilo

Recover ESXi Host Network shows all the necessary steps to recover an ESXi management network when connected to a vSphere Distributed Switch (VDS). First things first: Describing the Scenario So, in this example, we have a four-node vSAN cluster, and the first ESXi host, for some reason (wrong configuration such as VLAN tagging, etc), is with “not responding” status, as we can see: All nodes are using a vSphere Distributed Switch (VDS), and all VMkernels adapters communicate through Port Groups attached to this VDS: Each ESXi host has four physical adapters: Each Port group uses two physical adapters: one Active…

Changing the Hostname on a Production vCenter Server shows all the steps I have used to change the vCenter Server hostname. Disclaimer: All steps shown here were performed in a lab environment. Before applying them to your environment, make sure to understand everything and, if possible, replicate them in a lab or test environment. We’ll not be responsible for any downtime caused to your environment due to unplanned and untested actions! During this process, the vCenter Server will be unavailable for some minutes (15 – 20 minutes in my test because all vCenter Server services will be restarted). So, make…

An Introduction to PowerFlex REST API Operations shows how to start using the powerful API of the PowerFlex solution. We have written some PowerFlex articles. Click here to see them all!In this article, I will focus only on PowerFlex API Operations. To learn more about PowerFlex, first, check out our other PowerFlex articles. We are using PowerFlex version 4.5.2. So, our commands shown here were tested on this version!We use the “curl” application to execute each API call. First and foremost, what is an API? An API (Application Programming Interface) is a set of rules and protocols that allows different software applications…

How to Switch the MDM Cluster Mode shows how to switch from a 3_node PowerFlex MDM cluster to a 5_node MDM cluster. We are running the PowerFlex 4.5.2! Currently, our MDM cluster has three nodes, as we can see below: Our goal here is to add two more nodes: pfmp-sds-04 and pfmp-sds-05. Both nodes (pfmp-sds-04 and pfmp-sds-05) already have the necessary rpm packages installed: Adding Standby MDM Nodes Since our MDM cluster is a three-node cluster (3_node), we need to add both additional MDM nodes first. The following command will add the node “pfmp-sds-04” with the “manager” role. The node…

Using IOmeter on Windows is an article that shows how to measure disk IOPS with the IOmeter tools under a Windows OS. First and foremost, What is IOmeter? Iometer is a workload generator based on a client/server architecture. A graphical user interface, named Iometer, acts as a server coordinating the workers. The workers, named Dynamo, do the real I/O. To download the Windows IOmeter, click here. Why Should I Use IOmeter? The IOmeter is a client/server tool for measuring disk input/output per second (IOPS). If you have a block device offered by a storage system and need to measure its…

Shutting Down the PowerFlex Manager Cluster shows how to properly shut down the PowerFlex Management cluster to avoid database issues. We have written some PowerFlex articles. Some of them are introductions to the PowerFlex solution and how to deploy a PowerFlex Manager cluster on Linux. You can click on each link below to read both articles: Our lab environment is based on the PowerFlex 4.5.2 version: Warning: I haven’t tested it on older PowerFlex versions. So, be careful and use it at your own risk! First and Foremost, What is the PowerFlex Manager? PowerFlex Manager simplifies deployment, management, and automation…