Software-defined storage (SDS) enables users and organizations to uncouple or abstract storage resources from the underlying hardware platform for greater flexibility, efficiency and faster scalability by making storage resources programmable.
Category: Server Virtualization
“Corruption in dlmalloc” issue occurs because multiple esxcfg-dumppart threads attempt to free memory which has been used for configuring the dump partition. Thread A checks if there are entries to be freed and proceeds to free them, while within the same time frame, Thread B is also attempting to free the same entries.
Based on VMware KB2147888, this issue is resolved on ESXi 6 U3. But why issue is happening on ESXi 6 U3 or ESXi 6.5 U1 when they are installed on HPE ProLiant servers?
There is no need to introduce Nakivo for my reader at begin of each post. Nakivo is one of leaders in backup & replication market now. I writing reviews about Nakivo Backup & Replication since version 6.x. All new version had new amazing and useful features. Nakivo Backup & Replication v8.1 comes with two new features as well. In addition of new features, Nakivo Backup & Replication v8.1 has come with lot of improvement and fixes. Let’s review new features, improvements and fixes.
I guess, you know the instruction but let’s quick review. You can export virtual machines via some different tools such as vSphere Client, vSphere Web Client and others. All administrators do it today and familiar with OVA and OVF. It’s possible to export small virtual machines via vSphere Client, vSphere Web Client, PowerCLI. If you want to export virtual machine with 200~300 GB virtual disks (Thin or Thick), there is serious problem, just make sure that you have enough free space. But did you try to export big or monster VM as OVA or OVF?
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.
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.
I had publish a post about VMware Tools 10.3.0 and it’s issues last week. VMware recommended that downgrading VMware Tools to previous stable versions at the time and VMware Tools 10.3.0 was removed from download link.
Why VMware Tools 10.3.0 is Discontinued? VMware has release VMware Tools 10.3.0 on 12th July, It includes some new functionality such as VMware AppDefense Integration. But today, VMware asked the customers to downgrade VMware Tools on some guest OSes. Seems, there is some issues in some vSphere ESXi 6.5 configurations with the VMXNET3 network driver for Windows that was released with VMware Tools 10.3.0.As a result, VMware has recalled the VMware Tools 10.3.0 release. This release has been removed from the VMware Downloads page. In certain configurations, the VMXNET3 driver released with VMware Tools 10.3.0 can result in a Purple Diagnostic Screen (PSOD)...
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:
Eager-zeroed Thick Provisioned