With a normal SCSI LUN the underlying storage system has no knowledge of how the upper level operating system, hypervisor, file system or application such as a database (doing raw IO) is allocating the pages or blocks of memory aka storage. It is up to the upper level storage and data management tools to map from objects and files to the corresponding extents, pages and logical block address (LBA) understood by the storage system. In the case of a NAS solution, there is a layer of abstractions placed over the underlying block storage handling file management and the associated file to LBA mapping activity.
Reading and gathering knowledge of VMware VVOL’s will be needed much more in the coming days, so do yourself a favor and read the post.
- Zerto: The Road to IT Resiliency - January 23, 2019
- Enable your Data: Komprise - January 18, 2019
- Power to the Max - September 18, 2018
- Perception vs. Reality in Storage Performance - January 7, 2015
- VMware VVOL’s and storage I/O fundamentals - August 25, 2014
- Nutanix Networking — Quick Tip - June 3, 2014
- What’s Trending and Beyond - June 2, 2014
- Introduction to Openstack Storage Systems - February 5, 2014
- Build Your Own Scalable All-Flash Array With SVC - February 5, 2014
- Converged Architectures: it’s the use case, stupid! - December 19, 2013