[ovirt-users] Re: [Vdo-devel] impact of --emulate512 setting for VDO volumes

2019-03-03 Thread Michael Sclafani
Hi! 512 emulation was intended to support drivers that only do a fraction of their I/O in blocks smaller 4KB. It is not optimized for performance in any way. Under the covers, VDO is still operating on 4KB physical blocks, so each 512-byte read is potentially amplified to a 4KB read, and each

[ovirt-users] Re: [Vdo-devel] impact of --emulate512 setting for VDO volumes

2019-03-01 Thread Guillaume Pavese
Thank you very much for your answer. I am copying ovirt-devel too as that could be of interest to them. Guillaume Pavese Ingénieur Système et Réseau Interactiv-Group On Sat, Mar 2, 2019 at 7:00 AM Michael Sclafani wrote: > Hi! > > 512 emulation was intended to support drivers that only do a