[svlug] [svlug-announce] SVLUG Jan. 17th meeting: Louis Imershein on Inline Dedupe & Compression for Linux Block Storage

Steve Litt slitt at troubleshooters.com
Tue Jan 16 07:20:47 PST 2018

On Tue, 16 Jan 2018 04:16:30 -0800
Rick Moen <rick at linuxmafia.com> wrote:

> Wednesday, January 17th, 2018
> 7 - 8:30pm
> TOPIC: Inline Dedupe & Compression for Linux Block Storage
> PRESENTED BY: Louis Imershein,
> Principal Product Manager for Data Reduction Technologies, Red Hat
> Data deduplication and compression can increase the capacity of
> storage, allowing users make more efficient use of existing storage,
> and to make new fast storage more affordable. 


> The Virtual Data Optimizer
> (https://access.redhat.com/ecosystem/software/1484263) dm-vdo) is a
> new open source project from Red Hat that provides inline data
> reduction for primary storage to the Linux block-storage stack.

Eliminating redundancy (duplication) can obviously increase storage
density, but I've found many situations where the existance of some
redundancy helped recover lost information when some little thing went

I can't attend the meeting because it's kind of a long drive, but I
hope that any facilities to make the newly deduplicated data less
brittle will be discussed. For instance, I'm wondering if some kind of
parity scheme is added to error-correct, but at a lower disk space cost
than a simple filesystem?

Incidentally, in my Troubleshooting Courses I recommend a certain level
of redundant diagnostic tests in order to prevent one or two bad
assumptions from sending the whole search into a wild goose chase.



Steve Litt
January 2018 featured book: Troubleshooting: Why Bother?

More information about the svlug mailing list