Author: Davoud Teimouri

vm perfanalyzer 3 1 0

Reviews

Opvizor Performance Analyzer 3.0

New version of “Opvizor Performance Analyzer” has been released by Opvizor team. Opvizor Performance Analyzer is a real-time performance analyzer and designed to finding performance issues and bottlenecks in your virtual farm. Opvizor has provided a fully customized dashboard to real-time monitoring for VMs, hosts and … . Opvizor Performance Analyzer supporting: VMware vSphere, VMware vCenter Appliance (VCSA), Microsoft Hyper-V, NetApp Docker, Linux and Windows Guests, Datacore, Microsoft SQL many more… You can find more information and download it from this link: Download Trial Version

QEMU disk image utility for Windows 0

Free Tools

QEMU disk image utility for Windows

QEMU disk image utility for Windows. It is used for converting, creating and consistency checking of various virtual disk formats. It’s compatible with Hyper-V, KVM, VMware, VirtualBox and Xen virtualization solutions.This build has been optimized for Windows Server (x64), including Windows Nano Server. Warning: Never use qemu-img to modify images in use by a running virtual machine or any other process; this may destroy the image. Also, be aware that querying an image that is being modified by another process may encounter inconsistent state Supported formats Image format Argument for -f and -O options VMDK (VMware) vmdk QCOW2 (KVM, Xen) qcow2 VHD (Hyper-V) vpc VHDX (Hyper-V) vhdx RAW raw VDI (VirtualBox) vdi You can download this utility from this link: https://cloudbase.it/downloads/qemu-img-win-x64-2_3_0.zip You can find more information and example of usage in the manual page.

numa 10cores dl380 1 2

Reviews

NUMA and vNUMA: Back to the Basics for Better Performance

I want to clear some misunderstanding in this post by some explanations about NUMA technology in physical and virtual machines. As first step, join me to review UMA technology: Uniform memory access (UMA) is a shared memory architecture used in parallel computers. All the processors in the UMA model share the physical memory uniformly. In a UMA architecture, access time to a memory location is independent of which processor makes the request or which memory chip contains the transferred data. Uniform memory access computer architectures are often contrasted with non-uniform memory access (NUMA) architectures. In the UMA architecture, each processor may use a private cache. Peripherals are also shared in some fashion. The UMA model is suitable for general purpose and time sharing applications by multiple users. It can be used to speed up the execution of a single large program in time-critical applications NUMA technology: Non-Uniform Memory Access (NUMA) is a computer memory design used in multiprocessing, where the memory access time depends on the memory location relative to a processor. Under NUMA, a processor can access its own local memory faster than non-local memory, that is, memory local to another processor or memory shared between processors. Now what...

osjs 0

Reviews / Desktop Virtualization

What is web desktop?

This century has begun with a big jump in portable devices and gadgets technology. Few years ago, we had to carry our big laptop for attending to our meetings or … . Today, we have smart phones and we can do anything on them.But those are not powerful like laptops or desktops and they have small screen and they have many limitation yet. Today, we keeping our data (Important data) on cloud storage services and our portable devices become smaller. Today, we are using virtualization technology for reduce our costs and we are implementing our virtual data centers around the world. Today, we are using virtual desktops instead of physical desktops and we have some protocols for connecting to them remotely and have experiences same as physical desktops even from a web browser. This is a gift from virtualization leaders to us. But virtual desktops are still expensive and needs to modern hardware. There is another solution and you can have your web desktop. A web desktop or webtop is a desktop environment embedded in a web browser or similar client application. A webtop integrates web applications, web services, client–server applications, application servers, and applications on the local client into...

fcoe disable 005 0

Server Hardware

FIP VLAN ID unavail. Retry VLAN discovery

I was faced with the below log in ESXi “vmkernel.log” and I want to explain the issue and share the solution with you: fip: fcoe_ctlr_vlan_request() is done fip: host7: FIP VLAN ID unavail. Retry VLAN discovery First, I want to say that this is an issue and not a serious problem and you can ignore it but the log will be repeated continuously. Now, what is the root cause? The root cause is using CNA adapters as network adapter. As you may now, CNA (Converged Network Adapter) is a network adapter that you can use its port as network port or FCoE port for storage connectivity. FCoE is enabled by default on all ports and ESXi trying to discover FCoE VLAN and targets when discover the FCoE feature on the ports. When ESXi couldn’t discover FCoE connection, force the driver to find and discover it again. Now, what is the solution? There is two solutions that I recommend use the second solution because removing driver or any part of ESXi is not recommended. As the first solution, you can disable FCoE feature on the ports and remove the driver from ESXi: Determine which vmnics have FCoE capability esxcli fcoe nic...

Loop and pause flood protection 0

Server Hardware

Loop and pause flood protection

Loop protection The loop protection feature enables detection of loops on downlink ports, which can be Flex-10 logical ports or physical ports. The feature applies when Device Control Channel (DCC) protocol is running on the Flex-10 port. If DCC is not available, the feature applies to the physical downlink port. Network loop protection uses two methods to detect loops: It periodically injects a special probe frame into the HP Virtual Connect domain and monitors downlink ports for the looped back probe frame. If this special probe frame is detected on downlink ports, the port is considered to cause the loop condition. It monitors and intercepts common loop detection frames used in other switches. In network environments where the upstream switches send loop detection frames, the HP Virtual Connect interconnects must ensure that any downlink loops do not cause these frames to be sent back to the uplink ports. Even though the probe frames ensure loops are detected, there is a small time window depending on the probe frame transmission interval in which the loop detection frames from the external switch might loop through down link ports and reach uplink ports. By intercepting the external loop detection frames on downlinks, the...

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Backup & Replication / Reviews

Veeam Linux Agent

Veeam Endpoint Backup was introduced by me on another post. Veeam Endpoint Backup is an application for Windows and now, Veeam has made an agent for Linux and you be able to take backup from Linux machines files. This is beta version and I suggest that don’t install it for production purpose but you can test it on test environment. Linux desktop distributions are popular today more than few years ago and many users use Linux on their laptops and desktops and their data needs to protection and backup. Also VMware and Citrix added support for Linux desktop distributions as VDI operating systems, so you can have VDI benefits such as remote protocols on your Linux desktop and Veeam Endpoint Backup focus on this solution and it will cover Linux and Windows clients in future. Veeam Linux Agent has the below benefits: Backup anywhere Back up Linux instances running in the cloud or on premises Flexible recovery Perform on-premises restores from backups of individual cloud instances, or cloud restores of on-premises backups Integration with Veeam Backup & Replication™ Take full advantage of Veeam backup repositories as target locations; leverage existing Veeam Backup & Replication capabilities for granular recovery — and...

Windows93 1

Reviews

Windows93!

Windows 93 has been released now! This is real and you can test the OS that never was. Windows 93 is available on: www.windows93.net This is web based and you can test its application and have some fun.

nested virtualization 0

Server Virtualization

ESXi Virtual Appliance

As you may know, you can install hypervisors on virtual machines for testing purpose. When you had installed ESXi on virtual machine, you did nesting virtualization. But think about installation process, any installation needs around 20 minutes and if you cloned a ESXi machine, it will be not worked properly on other virtual machine and you have to change your configuration manually. Now there is good solution and it’s ESXi virtual appliance. You can download ESXi OVA file and import it to your host or vCenter and also you can configure it during import process. ESXi virtual appliance is available at the below links: ESXi 6.0 Virtual Appliance download link ESXi 5.5 Virtual Appliance download link  ESXi virtual appliance maybe updated after releasing new version. The last versions are: ESXi 6.0 U2 ESXi 5.5 U3 The ESXi virtual appliance including the below configurations: ESXi 6.0 U2: ESXi 6.0 Update 2 GuestType: ESXi 5.x (backwards compat) vHW 10 2 vCPU 6GB vMEM 2 x vmxnet3 vNIC 1 x 2GB HDD (ESXi Installation) 1 x 4GB SSD (for use w/VSAN, empty by default) 1 x 8GB SSD (for use w/VSAN, empty by default) VHV added dvFilter Mac Learn VMX params added disk.enableUUID VMX param added...

mauros 0

Reviews

MaruOS

MaruOS is a Linux desktop distribution that it can convert your Nexus phone to a desktop computer. MaruOS is created from Debian sources and it’s supporting wide range of applications such as LibreOffice. You have too accept the risk of installing another OS on your cell phone but then you have portable powerful desktop. You need to have a micro-USB to HDMI converter for screen connectivity. Keyboard and mouse will be connected to smart phone via Bluetooth. You can download this OS from this link: https://github.com/maruos/maruos/releases

HP iLO Standalone Remote Console 4

Reviews

HPE iLO Standalone Remote Console Client

HPE iLO standalone remote console client is a .Net application that you can download it from HPE iLO page. When you logon to iLO web administration page, you can access to this client but HPE iLO standalone remote console client can get your credential and works without opening iLO web administration. This is useful for administrators that they don’t want give iLO access to normal users and they can create usernames with remote console access. The console will operating according to your iLO license!

HPE Workload Accelerator 0

Server Hardware / Reviews

HPE Workload Accelerator

HPE Workload Accelerator is a PCI-e NAND flash SSD storage that it can help you to improve your services performance. HPE Workload Accelerator is closet to CPU and it can read and write data with higher speed compare to other storage and CPU does its task with lowest latency. HPE Workload Accelerator is suitable for big data, VDI, database and any process that it has high workload. Also this technology is available for Blade System as mezzanine card and deliver same experiences. HP Workload Accelerator is compatible with Windows, Linux and vSphere and HPE has provided driver for the OSes and hypervisor that the drivers are available on HPE Workload Accelerator support page. HP Workload Accelerator is available with 350GB capacity to 6.4TB capacity. You can choose it according to your service requirements. You can use HP Workload Accelerator as swap in Linux or put your database file on it in database servers or keep your sensitive virtual machine on it.

Proxmox Virtual Environment 1

Reviews

Proxmox Virtual Environment

Proxmox Virtual Environment is a management server for KVM hypervisor and container based hypervisor LXC. It has been made from Debian and has customized RHEL kernel. Proxmox Virtual Environment has web based management console and command-line management. Proxmox Virtual Environment name is no meaning and just chosen because the domain name was available. Proxmox Virtual Environment has clustering feature like live migration and HA and it is supporting iSCSI, FC, NFS and … . Proxmox VE can be clustered across multiple server nodes. Since version 2.0, Proxmox VE offers a high availability option for clusters based on the Corosync communication stack. Individual virtual servers can be configured for high availability, using the Red Hat cluster suite. If a Proxmox node becomes unavailable or fails the virtual servers can be automatically moved to another node and restarted. The database- and FUSE-based Proxmox Cluster filesystem (pmxcfs) makes it possible to perform the configuration of each cluster node via the Corosync communication stack. Proxmox is not free and you need pay for each physical socket. You can download it and test it as an live CD.

AMD Zen 0

News

Virtualization will be better on AMD processors by Zen

Finally, AMD has introduced AMD Zen micro-architecture with some enhancements, improvements and new features recently. AMD doesn’t have any technology like Intel Hyper-Threading till now but Zen architecture has SMT (simultaneous multi-threading) and AMD processors can compete with Intel processor in virtual environment. Hyper-Threading is a good processor feature for virtualization and it can improve performance and CPU capacity without adding new physical processor. AMD Secure Memory Encryption (SME) and AMD Secure Encrypted Virtualization (SEV) are two virtualization features for improving virtual environments security. We have to wait for first Opteron processor with Zen architecture and test it.

Unswap memory pages swapped on vSphere 6.x 0

News

Unswap memory pages swapped on vSphere 6.x

Duncan Epping has published another good post and he has introduced a solution for unswapping in vSphere. You know that you have to use vMotion or power cycle for unswap but it seems, there is a solution that it’s very simpler. So read the below post and put your feedback. I have memory pages swapped, can vSphere unswap them?