This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Announcing the first release of SnowFlock

To: "Andres Lagar-Cavilla" <andreslc@xxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Announcing the first release of SnowFlock
From: "Javier Guerra" <javier@xxxxxxxxxxx>
Date: Fri, 12 Sep 2008 15:42:17 -0500
Cc: snowflock_announce@xxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 12 Sep 2008 13:42:54 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <48CACC69.4070900@xxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <48CACC69.4070900@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
On Fri, Sep 12, 2008 at 3:09 PM, Andres Lagar-Cavilla
<andreslc@xxxxxxxxxxxxxx> wrote:
> More technically:
> Snowflock is our prototype implementation of the / Impromptu Cluster (IC)/
> abstraction. In an IC, an application encapsulated inside a virtual machine
> (VM) is swiftly forked into multiple copies that execute on different
> physical hosts, and then disappear when the computation ends. ICs simplify
> the development of parallel applications and reduces management burden by
> enabling the instantiation of new stateful computing elements: workers that
> need no setup time because they have a memory of the application state
> achieved up to the point of forking. This approach combines the benefits of
> cluster-based parallelism with those of running inside a VM.
> Snowflock provides swift parallel VM cloning that makes it possible for
> Internet applications to deliver near-interactive performance for
> resource-intensive highly-parallelizable tasks. Snowflock makes use of four
> key techniques: /VM descriptors/ (condensed VM images that allow for
> sub-second suspension of a running VM and resumption of a of replicas); a
> /memory-on-demand/ subsystem that lazily populates the VM's memory image
> during runtime; a set of / avoidance heuristics/ that minimize the amount of
> VM memory state to be fetched on demand; and a /multicast distribution/
> system for commodity Ethernet networking hardware that makes the overhead of
> instantiating multiple VMs similar to that of instantiating a single one.

just reading the docs.... i find it nice how you can drive the
duplication of VMs from within the VM.  great for grids.

could you elaborate about the memory-on-demand? i couldn't find
anything about it on the manual, and it seems like a major advantage.


Xen-users mailing list

<Prev in Thread] Current Thread [Next in Thread>