Comments on: Slides from Web2.0 Expo 2009. (and somethin else interestin’)

By: Confluence: Project: pxCream

Confluence: Project: pxCream — Mon, 13 Jul 2009 13:16:08 +0000

Graphic library…

Question: Which graphic library to use Which graphic library will be the fastest to resize JPEG large files? Answer: GraphicsMagick…

By: How to Succeed at Capacity Planning Without Really Trying : An Interview with Flickr’s John Allspaw on His New Book | Unix Stuff

Sun, 12 Apr 2009 00:17:21 +0000

[...] Operational Efficiency Hacks Web20 Expo2009 by John Allspaw. 131 picture perfect slides on operations [...]

By: allspaw

allspaw — Wed, 08 Apr 2009 06:51:44 +0000

Rehan: I’m planning on it, for sure…just need to make sure that The Mothership™ Yahoo is ok with me posting them.

By: Rehan Iftikhar

Rehan Iftikhar — Mon, 06 Apr 2009 21:10:06 +0000

You mentioned some self-healing scripts in your talk @ Web 2 expo. Do you think you might be able to post some of those (mysql if possible)?

Great talk btw

By: 秋元@男子産前休暇ブログ » FlickrがPHP4からPHP5に移行

秋元@男子産前休暇ブログ » FlickrがPHP4からPHP5に移行 — Sun, 05 Apr 2009 07:49:54 +0000

[...] via Kitchen Soap [...]

By: Bob Friesenhahn

Bob Friesenhahn — Sun, 05 Apr 2009 01:10:40 +0000

I don’t see anything in Amazon’s description of EC2 which says that it provides exclusive access to the CPUs. In fact, the same system could be running a number of VMs hosting different operating systems for different users. Perhaps the CPUs also provide processing for Amazon’s web site. Amazon suggests that EC2 uses spare computing resources. If the access is not exclusive then it can be expected that CPU caches will be reloaded and there will be more overhead. Optimum OpenMP performance depends on optimum use of CPU cache and minimal latency.

Reports I have read elsewhere (e.g. USENIX Login) found similar performance characteristics from Amazon’s EC2.

I don’t know if GCC/GOMP always consumes total number of cores available, or if the Linux OS always offers all of the cores. Perhaps there is an upper limit to the default. Some operating systems require administrative action before a user has access to more cores.

By: Chad Dickerson

Chad Dickerson — Sat, 04 Apr 2009 15:54:08 +0000

If you’re expecting a comment on the tech content of your talk, it was great, as to be expected. But more importantly, the last slide in your presentation is AWESOME.