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https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.storage.doc/GUID-08CBB1F0-0CF5-4783-9A12-EB3B5A2BB830.html
The host can recognize underlying thin-provisioned LUNs and monitor their space use to avoid running out of physical space. The LUN space might change if, for example, your VMFS datastore expands or if you use Storage vMotion to migrate virtual machines to the thin-provisioned LUN.
https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.storage.doc/GUID-08CBB1F0-0CF5-4783-9A12-EB3B5A2BB830.html
A VMFS datastore that you deploy on the thin-provisioned LUN can detect only the logical size of the LUN. For example, if the array reports 2TB of storage while in reality the array provides only 1TB, the datastore considers 2TB to be the LUN's size.
https://pubs.vmware.com/vsphere-51/topic/com.vmware.vsphere.storage.doc/GUID-08CBB1F0-0CF5-4783-9A12-EB3B5A2BB830.html
Array Thin Provisioning and VMFS Datastores You can use thin provisioned storage arrays with ESXi . Traditional LUNs that arrays present to the ESXi host, are thick-provisioned.
https://www.jacobhopkinson.com/2019/08/16/vmware-vvols-pure-storage-and-thick-provisioned-vvols/
Aug 16, 2019 · • Thin provisioning. Like conventional arrays that support thin provisioning, FlashArrays do not allocate physical storage for volume sectors that no host has ever written, or for trimmed (expressly deallocated by host or array administrator command) sector addresses. • Micro provisioning.
https://www.vembu.com/blog/reclaiming-thin-provisioned-storage-space-with-vmware-unmap/
This is the classic characteristic of thin provisioning a virtual disk. Thin Provisioned disk shows 0KB size on the datastore even though it is a 40 gig disk. The VMFS UNMAP operations inform the storage array that the blocks that it still has allocated as being in use are now able to …
https://blogs.vmware.com/virtualblocks/2018/09/10/vmware-vsan-6-7u1-storage-reclamation-trim-unmap/
Sep 10, 2018 · VMware vSAN supports thin provisioning, which lets you, in the beginning, use just as much storage capacity as currently needed and then add the required amount of storage space at a later time. Using the vSAN thin provisioning feature, you can create virtual disks in a thin format.
https://www.codyhosterman.com/2018/02/vmware-storage-capacity-reporting-part-ii-vmfs-and-eagerzeroedthick-virtual-disks/
VMware Storage Capacity Reporting Part II: VMFS and Thick Virtual Disks ... But when you introduce the concept of multiple levels of thin provisioning AND data reduction into it, all usage is not equal (does it compress well? does it dedupe well? is it zeroes?). ... or really anything, you can check the VPD page for logical block provisioning ...
https://communities.vmware.com/thread/121987
Aug 25, 2010 · does esx vmfs support thin provision san lun/volumes ? With my Equallogics box i can present a volume/lun to a windows server with a space i think it will grow over time. say 200 gigs. ... The reason you don't want to use thin provisioning is for 2 reasons. performance and management. ... So I contacted VMware support and here is what they had ...
https://pubs.vmware.com/vsphere-50/topic/com.vmware.vsphere.storage.doc_50/GUID-AC8E9C20-C05F-4FB5-A5DA-11D0A77A291B.html
The VMware thin provisioning features help you eliminate storage underutilization problems at the datastore and storage array level. Subtopics Storage Over-Subscription
https://blogs.vmware.com/vsphere/2012/03/thin-provisioning-whats-the-scoop.html
Mar 01, 2012 · The whole point of thin provisioning, whether done on the array or at the hypervisor layer, is to allow a VM to run with just the storage it needs, and to avoid giving a VM storage that it might use sometime in the future. After all, you're paying for this storage, so the last thing you want is to be paying for something you might never use.
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