Category: Data Center

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.

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

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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.

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.

Microsoft Windows Insight 0

News / Operating System / Reviews

[Review]: Introducing Windows Server System Insights

As an IT admin, one of the responsibilities you have is to ensure systems continue to run smoothly. That is true for a number of activities and components, such as monitoring if a disk is going to run out of space, determining how much memory and processing a Hyper-V host is consuming so you can plan for new VMs, and many other examples.

Linux Kernel Patching 0

Operating System / Reviews

[Review]: What’s kernel Live Patching?

Dynamic Software Updating (DSU) Dynamic Software Updating (DSU) is a field of research pertaining to upgrading programs while they are running. DSU is not currently widely used in industry. However, researchers have developed a wide variety of systems and techniques for implementing DSU. These systems are commonly tested on real-world programs. Current operating systems and programming languages are typically not designed with DSU in mind. As such, DSU implementations commonly either utilize existing tools, or implement specialty compilers. These compilers preserve the semantics of the original program, but instrument either the source code or object code to produce a dynamically update-able program. Researchers compare DSU-capable variants of programs to the original program to assess safety and performance overhead. Software Hot-Swapping Hot swapping can also refer to the ability to alter the running code of a program without needing to interrupt its execution. Interactive programming is a programming paradigm that makes extensive use of hot swapping, so the programming activity becomes part of the program flow itself. Only a few programming languages support hot swapping natively, including Pike, Lisp, Erlang, Smalltalk, Visual Basic 6 (Not VB.net), Java and most recently Elm and Elixir. Microsoft Visual Studio supports a kind of hot swapping called Edit and Continue, which is supported by C#, VB.NET and C/C++ when running under a debugger. Hot swapping is the central method in live coding,...

Remote Direct Memory Access 1

Reviews / Server Virtualization

[Review]: What’s Remote Direct Memory Access(RDMA)?

Remote Direct Memory Access (RDMA) provides direct memory access from the memory of one host (storage or compute) to the memory of another host without involving the remote Operating System and CPU, boosting network and host performance with lower latency, lower CPU load and higher bandwidth. In contrast, TCP/IP communications typically require copy operations, which add latency and consume significant CPU and memory resources.

Oracle Secure Global Desktop 1

Desktop Virtualization / Reviews

[Review]: Oracle Secure Global Desktop

Oracle Secure Global Desktop is a secure remote access solution for any cloud-hosted enterprise application and hosted desktops running on Microsoft Windows, Linux, Oracle Solaris and mainframe servers. Oracle Secure Global Desktop works with a wide range of popular client devices, including Windows PCs, Macs, Linux PCs, Chromebook and tablets such as the Apple iPad and Android-based devices.

Windows Admin Center - Server Manager 1

Operating System / Reviews

[Review]: Windows Admin Center (Project Honolulu)

Windows Admin Center (Formerly Project Honolulu) is a new browser based management tool. Windows Admin Center the evolution of traditional in-box server management tools for situations where you might have used Remote Desktop (RDP) to connect to a server for troubleshooting or configuration. It’s not intended to replace other existing Microsoft management solutions.

Illustration of RecoverPoint for VMs protecting VMware VMs 0

Backup & Replication / Server Virtualization

[Review]: Dell EMC RecoverPoint for Virtual Machines

RecoverPoint for VMs is a virtualized solution that provides data replication, protection, and recovery within the VMware vSphere environment.

Enable quick recovery of VMware virtual machines to any point in time. Dell EMC RecoverPoint for Virtual Machines provides continuous data protection (CDP) for operational recovery and disaster recovery. You’ll manage your VM protection simply and efficiently.