Comments on: Memory Compression

By: New vSphere 4.1 Feature: Memory Compression « Virtualization Eh

New vSphere 4.1 Feature: Memory Compression « Virtualization Eh — Wed, 14 Jul 2010 14:35:55 +0000

[...] 4.1 Feature: Memory Compression Originally hitting the blogosphere via Scott Drummonds here, and presented as a future technology by Kit Colbert and Fei Guo at VMworld 2009, this cool new [...]

By: Virtualization Short Take #36 | Free Techie Blog

Virtualization Short Take #36 | Free Techie Blog — Tue, 06 Apr 2010 21:29:40 +0000

[...] Scott Drummonds provides a bit more information on the memory compression technology previewed by Steve Herrod at Partner Exchange 2010 a few weeks [...]

By: JeremyinNC

JeremyinNC — Mon, 22 Mar 2010 13:01:11 +0000

It seems to me that a lot of the stuff we are seeing are ways to push work up the hardware stack. So we’re doing with disk what we used to do with tape, ram (well SSDs) what used to be done on disk & now processor is being used instead of regular RAM (which really is what compression does, trading CPU cycles for a more compact but higher overhead way of storing stuff in memory. Virtualization started because we knew we had machines sitting their idle but more and more I think it’s a way to make sure all of the hardware is being utilized more effectively by blurring the lines between memory processor and storage.

Hardware is so fast now that going from one tier to another has a dramatic impact (tape->spinning disk-> SSD caching -> RAM -> processor). Good stuff, especially since it makes my CIO think I am magic, he keeps adding apps and our hardware requirements stay static or even drop in cost.

By: Scott

Scott — Thu, 11 Mar 2010 00:18:34 +0000

No official word on a change in existing policy. Given that large pages are so much bigger, they are much, much, much less likely to be common with other pages and be shared. There is little return in sharing large pages.

Of course, once memory is over-committed, ESX backs large pages with small pages and will share those small pages. This forfeits about half the value of large pages, but the guest page walks remain more efficient.

Scott

By: Les premières indiscrétions sur la prochaine version de vSphere – Le Blog de Julien Mousqueton

Wed, 10 Mar 2010 12:28:54 +0000

[...] Memory Compression This will avoid swap when RAM is overcommited by compressing a set of target pages to a special region. VMware measured the latency of this technique as a hundred times better than the latency of [...]

By: Andrew Fidel

Andrew Fidel — Tue, 09 Mar 2010 16:36:05 +0000

Scott, any news on TPS for large pages? I’m worried that we are going to trade off TPS for memory compression with the necessary performance hit when just enabling TPS for large pages might eliminate the need to compress in many situations.

By: Virtualization Short Take #36 - blog.scottlowe.org - The weblog of an IT pro specializing in virtualization, storage, and servers

Tue, 09 Mar 2010 15:05:06 +0000

[...] Scott Drummonds provides a bit more information on the memory compression technology previewed by Steve Herrod at Partner Exchange 2010 a few weeks [...]

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Thu, 04 Mar 2010 17:05:53 +0000

[...] Memory Compression « Pivot Point [...]

By: RTFM Education » Blog Archive » vNews – Mar, 2010

RTFM Education » Blog Archive » vNews – Mar, 2010 — Thu, 04 Mar 2010 16:36:18 +0000

[...] Guide – PDF Version Foundations for Cloud Computing with vSphere4 vSphere Session Montor 1.0 Xtravirt RDP vSphere4 Plug-in VMware PEX – Transparent Memory Compression (TMC) Microsoft – Linux Integration Tools [...]

By: How to Convert MP4 to MP3. M4A Converting :MP4 Soup.com

How to Convert MP4 to MP3. M4A Converting :MP4 Soup.com — Wed, 03 Mar 2010 18:23:52 +0000

[...] Memory Compression « Pivot Point [...]