Measuring storage performance on Linux systems can be done using multiple tools. However, there is one set of tools that comes stock with Linux. These are blktrace and blkparse. These tools trace SCSI commands and data flow through the kernel from request to final write. These tools even show states most people do not know …
Edward L. Haletky, aka Texiwill, is an author, analyst, developer, technologist, and business owner. Edward owns AstroArch Consulting, Inc., providing virtualization, security, network consulting and development and TVP Strategy where he is also an Analyst. Edward is the Moderator and Host of the Virtualization Security Podcast as well as a guru and moderator for the VMware Communities Forums, providing answers to security and configuration questions. Edward is working on new books on Virtualization.
Optimizing WordPress — Take III
I have written in the past about steps I have taken to optimize WordPress. There are now newer steps to take. Optimizing WordPress addresses the time it takes to render a page, as well as the scores you get via various scoring tools. The goal is to have a fast site, one that displays quickly without …
vSphere Upgrade Saga: 6.5 — Not Yet, But …
At the moment, I am waiting for several updates on VMware products to allow an upgrade to vSphere 6.5. Specifically, I am waiting on an upgrade of NSX and VIN that are supported by vSphere 6.5. The other tools I use should be fine with 6.5, but without those, I cannot upgrade. The vSphere Upgrade Saga …
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vSphere Upgrade Saga: iSCSI Woes
I run multiple iSCSI servers, ranging from HPE StoreVirtual (must trusted) and Synology Server (tertiary server) to my own CentOS 7 base iSCSI server (least trusted). All run over 10GB links. In general, iSCSI usually works quite well. But for some reason, my CentOS 7 iSCSI server would cause the management agents to fail and vSphere to disconnect …
vSphere Upgrade Saga: vCSA Helper VM, Part 2
Currently, the VMware vCenter Server Appliance (vCSA) requires a Windows helper VM. This helper VM can be loaded with a number of different items, most notably vSphere Update Manager (VUM) and VMware Horizon View Composer. The services this VM can contain are listed later in this article. Suffice it to say, the helper VM (or VMs) become critical to …
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vSphere Upgrade Saga: VSAN Try 2
In my previous vSphere Upgrade Saga post, VSAN Upgrade Woes, I discussed upgrade problems in a relatively unsupported configuration. I finally figured out why I had such a problem. It was not the unsupported nature of the configuration, but the disk space used within VSAN. In effect, my VSAN was heavily overcommitted, and as such, there was no …