Fling Labs: IOBlazer – IOPS and bytes/s and IO latency and playback VSCSI traces captured on VMware ESX through the vscsiStats utility

Source: Fling Labs

Summary

IOBlazer is a multi-platform storage stack micro-benchmark. IOBlazer runs on Linux, Windows and OSX and it is capable of generating a highly customizable workload. Parameters like IO size and pattern, burstiness (number of outstanding IOs), burst interarrival time, read vs. write mix, buffered vs. direct IO, etc., can be configured independently. IOBlazer is also capable of playing back VSCSI traces captured using vscsiStats. The performance metrics reported are throughput (in terms of both IOPS and bytes/s) and IO latency.

IOBlazer evolved from a minimalist MS SQL Server emulator which focused solely on the IO component of said workload. The original tool had limited capabilities as it was able to generate a very specific workload based on the MS SQL Server IO model (Asynchronous, Un-buffered, Gather/Scatter). IOBlazer has now a far more generic IO model, but two limitations still remain:

  1. The alignment of memory accesses on 4 KB boundaries (i.e., a memory page)
  2. The alignment of disk accesses on 512 B boundaries (i.e., a disk sector).

Both limitations are required by the gather/scatter and un-buffered IO models.

A very useful new feature is the capability to playback VSCSI traces captured on VMware ESX through the vscsiStats utility. This allows IOBlazer to generate a synthetic workload absolutely identical to the disk activity of a Virtual Machine, ensuring 100% experiment repeatability.

Advertisements

Fling labs: PowerActions for vSphere Web Client

Source: Fling Labs

Summary

PowerActions integrates the vSphere Web Client and PowerCLI to provide complex automation solutions from within the standard vSphere management client.

PowerActions is deployed as a plugin for the vSphere Web Client and will allow you to execute PowerCLI commands and scripts in a vSphere Web Client integrated Powershell console.

Furthermore, administrators will be able to enhance the native WebClient capabilities with actions and reports backed by PowerCLI scripts persisted on the vSphere Web Client. Have you ever wanted to “Right Click” an object in the web client and run a PowerCLI script? Now you can!

For example I as an Administrator will be able to define a new action for the VM objects presented in the Web client, describe/back this action with a PowerCLI script, save it in a script repository within the Web client and later re-use the newly defined action straight from the VM object context (right click) menu.

Or, I as an Administrator can create a PowerCLI script that reports all VMs within a Data Center that have snapshots over 30 days old, save it in a script repository within the Web client and later execute this report straight from the Datacenter object context menu.

Or better yet, why not share your pre-written scripts with the rest of the vSphere admins in your environment by simply adjusting them to the correct format and adding them to the shared script folder.

For additional information see the video in the Video tab, or read this article.


Script650
Click to enlarge

AutoIT: Scripting / GUI macro utility

Interesting Utility – This one is definitely going to be installed in my home lab for a test drive.

Here is the summary from the utility website AutoIT

AutoIt v3 is a freeware BASIC-like scripting language designed for automating the Windows GUI and general scripting. It uses a combination of simulated keystrokes, mouse movement and window/control manipulation in order to automate tasks in a way not possible or reliable with other languages (e.g. VBScript and SendKeys). AutoIt is also very small, self-contained and will run on all versions of Windows out-of-the-box with no annoying “runtimes” required!

AutoIt was initially designed for PC “roll out” situations to reliably automate and configure thousands of PCs. Over time it has become a powerful language that supports complex expressions, user functions, loops and everything else that veteran scripters would expect.