Starting to play with git

Been a mercurial user for a while, mercurial was IMO more mature when we started using it about 1.5 years ago. Git was new, and not quite as easy to deal with.
What a difference 1.5 years make. I find starting/importing new projects with Mercurial harder than I like. Its not bad, it just takes a bit more thinking than I want during import.
So I tried git tonight. Imported the deltaV tools in.
Like butta (like butter, e.g. smooth, easy, and tasty).
Creating the repository was easy. Moving data to it was easy. Almost trivial.

Read moreStarting to play with git

Security in the cloud

I don’t mean to rain on anyone’s cloud (ok … ok … been wanting to say that … ), but the double whammy of Google’s GMail and now zero-day phishing attack starts begging some serious questions of risk and security in “the cloud”.
Ok, I know, there are many different clouds. Ones within a firewall and local to a campus, ones external to a firewall or at a remote campus. There are SaaS, PaaS, and-any-other-letter-you-wish-aaS type apps.
And there are bad people who want to annoy you, pester you with Cyrillic spam (hey, I don’t speak Russian … not a clue what they say, and I get LOTS of them), steal your ID, and drain your accounts, grab your passwords, run off with your dog … You get the idea.

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Finally …

… the day job accepts credit cards (Visa, MC, AMEX) directly.
A long … long … time ago, I was critical of one of my former employers for not doing this … pointing out that we had lost sales as a result of it. I do not believe in erecting barriers to users buying what we sell. I want to streamline the processes and make them easier. Faster. Better.

Read moreFinally …

"Top HPC trends" … or are they?

John West at InsideHPC.com links to an article I read last week and didn’t comment on. In this article David Driggers, CTO at Verari, points out what he believes to be the top 5 trends in HPC.
In no particular order, he points out that CAS (content addressable storage) is “breakthrough technology” for archiving. Which is odd. In that industry insiders appear to have a somewhat different opinion on the value of CAS for archiving. Moreover, others point out that CAS is, itself, somewhat of a misnomer.

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on the test track

One of the issues often raised in discussions with users are IOP performance of JackRabbit. We have measured our 24 bay unit performance at a bit more than 5000 IOPs (8k random reads, as closely matching a test case handed to us by a customer looking at a competitive box, which scored under 4300 IOPs on the same test). The problem is that getting consistent workable tools to do this measurement is hard … windows users use IOmeter, other users will use SPC-1 and related. But we want a nice consistent tool for the job. I had thought of rolling one, until I found Jens Axboe’s fio tool. With this, I can recreate the relevant workloads fairly easily.
Of course, the purpose of this post is not to talk about fio. But instead to talk (a little) about a new project we took out to the test track. This is an IO system designed for speed. We wanted to do some time trials in the usual manner.
Then crack the throttle wide open, and stand out of the way of the bow shock.
Which is what we did.

Read moreon the test track