UPDATE: New ESXi 5.5 patches called off !!!

alert

Apparently VMware called off latest patches for ESXi 5.5 released on 30.4.2015, However all of them can be still residing in your Update Manager! There is no official statement from VMware out there yet, but I suggest you do not apply following patches: ESX550-201504101-SG ESX550-201504101-BG ESX550-201504102-BG ESX550-201504104-BG I have found… Continue reading

Interviewing for VMware vSphere Support Engineer job role: Overview

It happened, that part of my job is to interview a lot of newcomers who are seeking opportunities at IBM Brno, CZ. When I was just starting with this activity, I was trying to search internet what questions were usually asked when interviewing VMware vSphere guys, what a common was etc. Unfortunately, although… Continue reading

IBM/Lenovo (Pure) Flex system and vSphere part1: Useless stuff

flex chassis

In the last two years I was participating on the many designs, implementations and reviews of the vSphere on IBM/Lenovo Flex System or PureFlex, if you want to call like that. Therefore today I would like to share with you my preferred way of doing it right from vSphere perspective… Continue reading

Updated: Storage disconnects when using VAAI ATS on vSphere 5.5 Update2 and vSphere 6.0

alert

IBM has released a flash alert regarding a new behavior introduced in vSphere 5.5 Update2 and vSphere 6.0 where VAAI ATS (Atomic Test and Set or in the other words Hardware accelerated locking) is used for heartbeat I/O. http://www-01.ibm.com/support/docview.wss?uid=ssg1S1005201 According to IBM: Due to the low timeout value for heartbeat… Continue reading

Network Design Rack Server x3850 X5 with fourteen 1 GbE Network Adapters

Network Design Rack Server x3850 X5 with fourteen 1 GbE Network Adapters Welcome, I want to share with you one of my older network design with 1 GbE network adapters. In this example we will speak about IBM System x3850 X5, 4x Xeon 10C E7-8860, 8x Memory Expansion Cards, RAM 64x16GB… Continue reading

VM Resource and Availability Service Fling

VMware recently introduced  a new VM Resource and Availability Service fling, which helps you to identify the available resources in case of one or more ESXi hosts fail. The output will show how many VMs will be safely restarted, how many of them will be experiencing performance issue and how… Continue reading

vSphere 6.0 whats new – Updated

Update 1.4.2015 : added vSphere Data Protection, updated vSphere Replication, corrected host max VMs, added VVOL details vSphere 6.0 is out since 2nd of February 2015 lets see whats new: 1. Compute Features the new virtual hardware ‘version 11’ 128 vCPUs (64 vCPU with 5.5) 4TB of RAM (NUMA aware) (1TB… Continue reading