Datacenter solutions are changing faster than ever as business development and new customer demands increase and legacy solutions are no longer suitable for today’s operations. Organizations need to develop new, modern, automated, and intelligent solutions to keep pace with business demands. One of the steps to achieving this flexibility for business continuity, capacity expansion, and disaster recovery is hyper-converged infrastructure […]
I was moving a virtual machine from one data store to another that I faced with the following error In the VMware documentation, it occurs on the virtual machines that have disks with the multi-writer attribute. While in my environment the virtual machine was not like this, after a bit of Google searching, I found a hint in one of the forums […]
Data Domain is a purpose-built backup appliance used by many organizations to store backup data. The Data Domain appliance can be used as a Common Internet File System (CIFS)/Server Message Block (SMB) or Network File System (NFS) file share. Data Domain can also be integrated into various traditional backup applications. This makes it an excellent option for enterprises to use […]
In this post, I want to briefly describe three types of caches: write-through, write-back, and write-around. The cache is semiconductor memory where data is placed temporarily to reduce the time required to service I/O requests from the host. Write operations with cache provide performance advantages over writing directly to disks. A write operation with cache is implemented in three ways which have […]
One of the common problems in software-defined datacenters is the latency of the virtual machine disk which will slow down the application and increase response time. The virtual machine owner or user declares that its system is slow and the question arises whether the slowdown is coming from a virtual infrastructure or storage device or operating system and how to […]
Zoning is an FC switch function that enables nodes within the fabric to be logically segmented into groups that can communicate with each other. The zoning function controls this process by allowing only the members in the same zone to establish these link-level services. Zoning includes three types: Port zoning or hard zoning: It uses the FC addresses of the […]
The application I/O size and the number of I/Os the application generates are two important measures affecting disk performance and response time. Consequently, the storage design and layout for an application commences with the following: Analyzing the number of I/Os generated at peak workload Documenting the application I/O size or block size Storage requirements for an application are specified in […]
