Friday Jun 04, 2010

Visualizing System Latency

Heat maps are a unique and powerful way to visualize latency data. Explaining the results, however, is an ongoing challenge.

Brendan Gregg, Oracle

When I/O latency is presented as a visual heat map, some intriguing and beautiful patterns can emerge. These patterns provide insight into how a system is actually performing and what kinds of latency end-user applications experience. Many characteristics seen in these patterns are still not understood, but so far their analysis is revealing systemic behaviors that were previously unknown.

continue reading in ACMQueue

Tuesday May 04, 2010

Oracle Storage Bloggers

Here are some of the folks who blog actively about storage at Oracle, listed roughly in order of popularity.

(If I'm missing someone, please let me know in the comments - more sources are always welcome!)


Jeff Bonwick - the big daddy of ZFS

BigAdmin - Rick Ramsey's funny and very useful blog about what's going on in the world of admins, which includes, of course, storage - BIG storage

Brendan Gregg - the man who shouts at JBODs on Fishworks, storage, and performance

Adam Leventhal - Fishworks

Oracle Solaris Video - many, many technical videos about all aspects of Solaris storage

Bizarre ! Vous avez dit Bizarre ? - Roch (rhymes with Spock) Bourbonnais : Kernel Performance Engineering. What to know how to get the best performance out of ZFS? Roch's your man.

The Observation Deck - Bryan Cantrill, one of the daddies of DTrace

Fishworks - what it says

Erick Schrock - "Musings about Fishworks, Operating Systems, and the software that runs on them"

On the Edge of the Open Storage Frontier - Tom Haynes brings 'em back alive

Dominic Kay - beneath that self-effacing British exterior lurks a man who really knows file systems

Internal Affairs - Dave Pacheco on Fishworks







Tuesday Mar 25, 2008

Video: The New and Improved Filebench

Sun Senior Software Engineer Drew Wilson speaks at Usenix FAST (Feb, 2008) on The New and Improved Filebench.

Wednesday Mar 05, 2008

Video: Filebench

Spencer Shepler speaking at the SNIA Storage Developers' Conference (September, 2007) on Filebench.

55 mins.

download the presentation on Filebench 

Wednesday Feb 20, 2008

What We're Reading: Dan on Symbiosis with Hitachi, Richard on Clusters

Symbiosis "Over the last couple of months my team has been working hard with our partner and OEM, Hitachi Data Systems to help get native support for the AMS 500 in the operating system. MPxIO, our core path state and encapsulation technology with responsibility for high availability on a wide range of storage arrays now just works with the AMS as of build 84 of Open Solaris." - Dan Maslowski

Big Clusters and Deferred Repair - "When we build large clusters, such as high performance clusters or any cluster with a large number of computing nodes, we begin to look in detail at the repair models for the system. You are probably aware of the need to study power usage, air conditioning, weight, system management, networking, and cost for such systems. So you are also aware of how multiplying the environmental needs of one computing node times the number of nodes can become a large number." - Richard Relling

 

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