DevConf.CZ 2020

dm-vdo is a device mapper target that provides block level
deduplication, compression, and thin provisioning. It can be difficult
to predict how much storage can be saved with dm-vdo because
deduplication and compression are very data dependent. Now there is an
open source vdoestimator tool that can be used to scan a filesystem or
block device for duplicate and compressible blocks using the same
indexing and compression technology used by dm-vdo. While there are
general guidelines for provisioning a dm-vdo volume for some common
workloads, the vdoestimator may help to get a better estimate for
specific data.

This session will demonstrate how to use the vdoestimator tool and
interpret the results with some examples. A brief overview of how
dm-vdo and the vdoestimator work will help to clarify how best to do
that.