Davoud Teimouri

Virtualization & Datacenter

Category: Server Virtualization

VMware vSphere, Microsoft Hyper-V, Citrix Xen Server, Oracle VM Server, Red Hat KVM.

ESXi PCI Passthrough – Large VM Memory (MainHeap) BUG!

ESXi PCI Passthrough This is a combination hardware and software feature on hypervisors to allows VMs to use PCI functions directly And we know it as VMDirectPath I/O in vSphere environment. VMDirectPath I/O needs some requirements to work perfectly, please read this KB for more information, as we read it! https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2142307 There is also some […]

8,520 total views, 13 views today

VMware Tools Client – Interact with a VM without Network Connectivity

VMware Tools Client - Main Window

VMware Tools Client VMware Tools Client is a beta tools to interact with VMs without network connectivity. May know, there is some vSphere API that developers can write some codes and developing their tools for vSphere environments. VMware Tools Client written by Pierre Lainé is a useful tool to managing virtual machines via vSphere Guest […]

7,070 total views, 7 views today

Find, Convert And Compare, VMware Virtual Machine And Windows Guest UUID

What’s UUID? Each virtual machine has UUID and it will appear on OS as guest UUID too. A universally unique identifier (UUID) is a 128-bit number used to identify information in computer systems, the 16 bytes of this value are separated by spaces. Microsoft uses the term globally unique identifier (GUID), either as a synonym […]

1,852 total views, 2 views today

OpBot – Virtual Assistant For Your Virtual Datacenter – New Release

Architecture

You may read previous post about OpBot on this blog and if you didn’t check it, here is the previous post: OpBot – Virtual Assistant For Your Virtual Datacenter Now, new version of the virtual assistant is available to download and try it as free software for limited period of time. There is some changes […]

3,684 total views, 2 views today

RVTools 3.9.2

You may know this great free tool that I guess, most of VMware vSphere administrators used it for create reports from their environment. RVTools is a Windows .NET application and you need to install .NET4 for run the latest version. 2,854 total views, 6 views today Davoud TeimouriDavoud Teimouri is as a professional blogger, vExpert 2015-2016-2017, VCA, […]

2,854 total views, 6 views today

NMI purple diagnostic screen on HPE ProLiant Gen8 servers

It seems, there is an issue on HPE G8 servers with the below ESXi versions: ESXi 5.5 Patch 10 ESXi 6.0 Patch 4 ESXi 6.5 Intel® IOMMU’s (aka VT-d) interrupt remapper functionality has been changed in the above versions and you need to enable it manually: 4,495 total views, 3 views today Davoud TeimouriDavoud Teimouri is as […]

4,495 total views, 3 views today

Nakivo Backup & Replication 7 – Download Beta Version

Nakivo Backup & Replication 7

Finally, the new version of Nakivo is available to download as beta version. The new version has many new features and improvements that we have reviewed them on the previous posts: Nakivo 7 Beta! Hyper-V Supported Now! Nakivo Backup & Replication 7 – New Features Nakivo Backup & Replication 7 – Skip Swap File! Nakivo […]

3,742 total views, 10 views today

OpBot – Virtual Assistant For Your Virtual Datacenter

What’s OpBot? OpBot is a virtual assistant for VMware vSphere from Opvizor. OpBot is a full featured OpBot, that can manage VMware vSphere via natural chat commands from any device and any place. You can also connect OpBot with Opvzor Performance Analyzer, which unleashes amazing new remote troubleshooting and analysis possibilities. OpBot can give you […]

3,604 total views, 2 views today

Oracle VM Server – Log Files

Oracle VM

Why You Need Log Files? Log files are keys to resolving problems in any IT system, why?! You are unable to troubleshooting without having log files. Any enterprise system must have logging system and logging is very important to IT administrators. Log location is very important for IT administrators even very importantly. Oracle VM Server […]

2,125 total views, no views today

Oracle VM Server – Memory Size of the Management Domain (Dom0)

Oracle VM

Oracle VM Server installer using the below algorithm to set default memory size for dom0: dom0 Memory = 502 (MB) + (Physical Memory (MB) * 0.0205) As an example, your physical server has 256 GB memory, dom0 needs to 5.7 GB memory. If you didn’t assign enough memory to dom0, you will face with serious […]

3,060 total views, 4 views today

Backup Solutions – Oracle VM

You will need to a backup solution in virtual environments same as physical environments. There is many backup solutions for VMware vSphere, Nakivo or Veeam are third-party solutions. Also Veeam is best third-party solution Hyper-V platform. But if you are implementing Oracle VM, you need to know, what is best backup and restore solution for […]

2,284 total views, 4 views today

NMONVisualizer – Free ESXTOP Tool

NMONVisualizer NMONVisualizer is a Java GUI tool for analyzing nmon system files from both AIX and Linux. It also parses IOStat files, IBM verbose GC logs, Windows Perfmon & ESXTop CSV data and JSON data. Download the latest version (2016-02-29).   Documentation Click here for an overview presentation. 3,452 total views, no views today Davoud TeimouriDavoud […]

3,452 total views, no views today

Memory Ballooning Problem – Windows Server 2008 R2

Ballooning Problem

 it seems, there is incompatibility issue between Windows Server 2008 R2 and VMware Ballooning driver and it’s cause of stop error on Windows: Stop A: 0xA As Microsoft describe in its KB, the issue is happening when ballooning activated on virtual machines that use NUMA. So, we know that NUMA can improve our machines performance […]

3,176 total views, 2 views today

Oracle VM – Virtualization Modes or Domain Types – Part 1

Introduction Oracle VM introduced two main modes or domain types: Paravirtualized (PVM):A virtual machine with a kernel that is recompiled to be made aware of the virtual environment. Runs at near native speed, with memory, disk and network access optimized for maximum performance.Paravirtualized guests use generic, idealized device drivers, which are part of the guest’s […]

1,828 total views, 9 views today

Oracle VM Server – Configuration Limits for Release 3.4

Oracle VM

Today, virtualization is under development by many companies and big companies trying to have their virtualization solution. Oracle VM is Oracle virtualization platform that it’s based on Xen hypervisor. You may know that any hypervisor has some limitations and configuration maximums and you should consider the limitation when you are deploying infrastructure or creating virtual […]

2,665 total views, no views today

Oracle VM 3.4.2 Released!

Oracle VM

Oracle has announced new version of their virtualization platform at Oracle OpenWorld 2016. The new version includes some new features and fixes which can improving Xen based virtualized farms. Some of the key new features that have been delivered include: Oracle VM Manager support for previous Oracle VM Server releases; Manage Oracle VM Server for […]

2,124 total views, 6 views today

Check CPU, Memory and Storage OverCommitment – PowerCLI

What’s OverCommitment? OverCommitment means virtual machines can use more resources than physical resources. CPU OverCommitment means you can create virtual machines with vCPU more than your server physical CPU, for example: Your server has two socket and each socket has 12 cores and also hyper-threading is enable, so you have 24 physical cores and 48 […]

2,503 total views, no views today

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