Re: [Scst-devel] Thin Provisioning and Ceph RBD's

[matthew p. <pat...@ya...>]

> - ESXI's VMFS5 is aligned on 1MB, so 4MB discards never actually free anything

the proper solution here is to:
* quit worrying about it and buy sufficient disk in the first place, it's not exactly expensive 
* ask VMware to have the decency to add a flag to vmkfstools to specify the offset
* create a small dummy VMFS on the block device that allows you to create a second filesystem behind it that's aligned on a 4MB boundary. Or perhaps simpler, create a thick-zeroed VMDK (3+minimum size + extra) on the VMFS such that the next VMDK created falls on the desired boundary.
* use NFS like *deity* intended like any other sane person, nobody uses block storage anymore for precisely these kinds of reasons.