Category: Uncategorized

Hi all…

As some of you might have noticed, I moved to WordPress (after the Joomla installation I was running bit-rot due to a php upgrade of my hosting).

The content of the site is however still very old… If you care to see what I am up to more recently you are better of looking me up on:

LinkedIn: https://www.linkedin.com/in/curino

Twitter: https://twitter.com/krlis1337

Google Scholar : https://scholar.google.ca/citations?user=wb9DYOEAAAAJ&hl=en&oi=ao

In Hadoop: https://issues.apache.org/jira/browse/YARN-1051?jql=text%20~%20%22curino%22

… you get the gist …

 

 

As a end-of-a-post-doc activity I released the source code of several pieces of software:

 

 

• A Java SQL Parser,based on jsqlparser and extended in syntax, visitors, functionalities (and added a rewriter for temporal sql) is now available at: http://code.google.com/p/tsqlparser/
• A JDBC-Proxy capable of rewriting temporal SQL back and forth from regular SQL (targetted as a simply tuple-level-timestamping over MySQL) is now available at: http://code.google.com/p/temporal-jdbc-proxy/
• A SQL to Category Theory representation (a quick proof-of-concept I put together with help David Spivak) is available at: http://code.google.com/p/sql-category-theory/
• A suite of OLTP/Web benchmarks is available here: oltpbenchmark.com

 

 

 

 

When buying a used car you should check the clutch is ok… here is a mechanics-trick on how to do it.

 

to check the state of a clutch you can:

1. pull-up the hand break completely
2. put the gear-lever to a high-gear (e.g., 4)
3. bring the engine high-up (as if you want to burn a light)
4. release gently the clutch

Check the following:

1. A good clutch will not slide and the result is that the car engine will shut-off (since the hand break is holding the car still, and the high gear is disadvantageous for the engine).
2. A bad clutch will start sliding, the engine do not stop, the car doesn’t move, and you soon will smell dead-clutch.

In either case interrupt the experiment right-away (to avoid to further screw the poor clutch).

 

Enjoy your new car

 

This article present is a webdiary of the installation of a XEN-based virtualized server. The Dom0 of choice is OpenSolaris, since it provides the nifty features of ZFS.

We are buying a fairly powerful machine, a:

 – 2xQuadcore XEON 2.2.6 Ghz 8MB cache

 – 24 GB RAM

 – 6 x 1TB Seagate 7200 RPM hot-swap SATA disks  (32MB cache)

This will be soon installed with OpenSolaris and we will try to virtualize with XEN, to host DomU with ubuntu (old and new), and maybe a Windows VM.