Davoud Teimouri - Virtualization and Data Center Blog

Linux Container 0

Reviews / Server Virtualization

Operating System Level Virtualization (Part 2) – Implementations Comparison

These days, everyone knows what’s Cloud Computing and cloud based services are using for speedup deployment of organizations services. Operating System Level Virtualization or Containers helping system architectures and administrators to achieve the goals. There are many implementations for containers that today, those methods are compatible with different hardware architectures and operating system.

You may know that Unix has OS Level Virtualization from past years and this technology is very older than other virtualization such as Full Virtualization or Paravirtulization.

Full Virtualization (VMware ESXi, Hyper-V) and Paravirtualization (Xen, UML) provides different guest OS but there is no way to use different guest OS when you are using containers. Of curse, some solutions are under development.

ancient 1

Operating System

NTP Software Implementations Comparison

This post is about NTP Software implementations actually, but I have to write some words about NTP. NTP is an angle for financial applications, actually some of services such as banking services are very depended to clock synchronizations protocols. NTP is an ancient thing, it is more than 30 years old and even older than Windows 7 and Windows XP.

HPE 0

Reviews

HPE Management Component Pack (MCP)

HPE Management Component Pack or HPE MCP provides agent software for use on community-supported distributions. The MCP (unlike the SPP) does not provide drivers and firmware (firmware is provided via HPSUM, and drivers are provided by the distribution vendors). The Linux Service Pack for ProLiant provides updated drivers and agent software for use on RedHat Linux and SUSE Linux Enterprise Server.

vSphere Central Categories 0

Reviews

vSphere Central, The Messenger of God

vSphere Central brings together a variety of technical assets from VMware that helps users understand how vSphere works, how to implement various features, plan upgrades, and more.  With content in a range of formats, including text, video, and rich media tools such as walk-through demos, the goal is to be a one-stop shop for original and curated technical content on vSphere.

iSCSI vs Fiber Channel 0

Server Virtualization

Guest Connected vs RAW Device Mapping (RDM)

RAW Device Mapping (RDM) is one of oldest VMware vSphere features which introduced to resolving some limitation on virtualized environments such as virtual disks size limitation and deploying services top of fail-over clustering services.

You can use a raw device mapping (RDM) to store virtual machine data directly on a SAN LUN, instead of storing it in a virtual disk file. You can add an RDM disk to an existing virtual machine, or you can add the disk when you customize the virtual machine hardware during the virtual machine creation process.

Provisioning Types Comparison 0

Reviews / Server Virtualization

VMDK Write Performance on Different Provisioning Types

VMDK (Virtual Machine Disk) has been designed to mimic the operation of physical disk. Virtual disks are stored as one or more VMDK files on the host computer or remote storage device, and appear to the guest operating system as standard disk drives.

VMware supports three provisioning types:

Thin Provisioned
Thick Provisioned
Eager-zeroed Thick Provisioned

Compatibility 0

Reviews

vSAN Backup Products Compatibility

vSAN is hyper-converged solution which provided by VMware to reduce implementation and maintenance costs of virtualization solutions. Currently, many companies and organizations using vSAN and SAN together to delivering storage space for services.

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Server Hardware

Hardware Status Problem on HPE ProLiant Gen10

The Hardware Sensor Status Reported in the vSphere Web Client Do you have any HPE ProLiant Gen10 on your virtual environment? Did you upgrade their iLO firmware to 1.30? If you have the servers with upgraded iLO firmware, you may face with the below status on Hardware status tab in vSphere Web Client: VMware vSphere 6.0 VMware vSphere 6.5 VMware vSphere 6.7 Good news, HPE engineers are working on this issue and it has no impact on production. It can be safely ignored but I recommend that install the new firmware after release.

VMware NSX Data Center for vSphere 6.4.2 0

News

What’s New in VMware NSX Data Center for vSphere 6.4.2

What’s New in VMware NSX Data Center for vSphere 6.4.2 New version of NSX has been introduced by VMware and NSX for vSphere is now known as NSX Data Center for vSphere. VMware NSX Data Center for vSphere 6.4.2 adds usability and serviceability enhancements, and addresses a number of specific bugs. Networking and Edge Services Multicast Support: Adds ability to configure L3 IPv4 multicast on Distributed Logical Router and Edge Service Gateway through support of IGMPv2 and PIM Sparse Mode. Default Limit of MAC identifiers: Increases from 2048 to 4096 Hardware VTEP: Added multi PTEP cluster capability to facilitate environments with multiple vCenters Security Services Context-Aware Firewall: Additional Layer 7 Application Context Support (EPIC, MSSQL, BLAST AppIDs) Firewall Rule Hit Count: ​Monitor rule usage and easily identify unused rules for clean-up Firewall Section Locking: ​​Enables multiple security administrators to work concurrently on the firewall NSX Application Rule Manager: Improved scale to 100 vNICs per session, further simplifying the process of creating security groups and whitelisting firewall rules for existing applications. NSX User Interface VMware NSX – Functionality Updates for vSphere Client (HTML): The following VMware NSX features are now available through the vSphere Client: TraceFlow, User Domains, Audit Logs, Events & Tasks. Operations and Troubleshooting Authentication & Authorization: Introduces 2 new roles (Network...

HPE MSL Tape Library Service Password 0

How To

HPE MSL Tape Library Service Password

HPE MSL (2024, 4048, 8096) has three different users for managing and monitoring tape library: User and Administrator password can be changed via LCD Panel but Service user has predefined password. The password is as follows: 42311324

security advisory 0

News / Security

E1000 NIC Out of Bounds Write Vulnerability

VMware has detect vulnerability on some products against E1000 NIC. The issue may allow a guest to execute code on the host. If you have any running virtual machine on VMware Workstation 14.x and Fusion 10.x, you must stop them and apply patch to the mentioned products before running any other virtual machine.

[New Release]: AutoLab v3.0 0

Free Tools

[New Release]: AutoLab v3.0

The version of FreeNAS has been updated, and pfSense replaces FreeSCO as the router, these changes make AutoLab more stable and reliable at the cost of much larger downloads. Each AutoLab package is around 2GB in size, so you should only download the version you will use.

HPE Serviceguard for Linux 1

Reviews / Server Hardware

HPE Serviceguard for Linux

HPE Serviceguard for Linux (SGLX), a high availability(HA) and disaster recovery (DR) clustering solution, increases uptime for your critical applications by protecting them from a multitude of infrastructure and application faults across physical or virtual environments over any distance. It reduces the impact of unplanned downtime with no compromise on data integrity and performance. Furthermore, it helps achieve near zero planned downtime for maintenance.