[openstack-dev] [Swift] Swift 2.0 release candidate

Matthew Oliver matt at oliver.net.au
Mon Jun 23 06:30:59 UTC 2014

Nice work swift devs!

Storage policies were a great idea and now they exist!

Awesome work!

On Jun 23, 2014 2:04 PM, "John Dickinson" <me at not.mn> wrote:

> Through extensive work from the entirety of the Swift dev team over the
> past year, storage policies have landed in Swift. Last Friday, we merged
> commit 1feaf6e2 which brings storage polices into master.
> I especially would like to publicly thank Paul Luse (Intel), Clay Gerrard
> (SwiftStack), and Sam Merritt (SwiftStack) for providing such tremendous
> focus, dedication, awesome ideas, and leadership to getting this feature
> designed, written, and merged.
> For those that don't know, storage policies are a way to take the global
> footprint of your Swift cluster and choose what subset of hardware to store
> the data on and how to store it across that subset of hardware. For
> example, a single Swift cluster can now have data segmented by geographic
> region or performance tier. Additionally, each policy can have a different
> replication factor, which enables high replication for local access (e.g.
> one copy in every PoP) or low replication for some data (e.g. image
> thumbnails or transcoded video).
> Storage policies is the necessary building block to allow non-replicated
> storage (i.e. erasure codes) in Swift, a feature that we are continuing to
> develop.
> Full documentation, including design, usage, and upgrade notes, can be
> found at http://swift.openstack.org/overview_policies.html.
> With this commit landing, we have tagged Swift 2.0.0.rc1. We are now
> having a two week QA period to allow community members to play with it in
> their labs. At the end of the RC period, we'll formally release Swift 2.0.
> The current target for this is Thursday July 3 (although I realize that
> discovered issues and the US holiday may put this at risk).
> In addition to participating in the OpenStack integrated release cycle,
> Swift makes semantically-versioned releases throughout the year. Because of
> the scope of the storage policies changes and because you cannot safely
> downgrade your cluster after configuring a second policy (i.e. you'd lose
> access to that data if you go to a pre-storage-policies release), we have
> chosen to bump the major version number to 2.
> Note that deployers can still upgrade to this version with no client
> downtime and still safely downgrade until multiple policies are configured.
> The full CHANGELOG for the 2.0 release is at
> https://github.com/openstack/swift/blob/master/CHANGELOG.
> If you are using Swift, please read over the docs, download the tarball
> from http://tarballs.openstack.org/swift/swift-2.0.0.rc1.tar.gz, and let
> us know what you find.
> --John
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