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Simpsons

Thursday, July 24. 2008

Es gibt mehr als 414 Folgen der Simpsons, doch Pro7 schafft es, immer wieder die selben Folgen zu senden ....
Posted by Joerg Moellenkamp in Movies at 18:55 | Comments (3) | Trackbacks (0)
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links for 2008-07-24

Thursday, July 24. 2008


Posted by del.icio.us in del.icio.us at 13:33 | Comments (0) | Trackbacks (0)

Linux, DTrace and the NIH syndrome

Thursday, July 24. 2008

I wrote about the the strong "Not invented here" syndrome in the Linux community a year ago in DTrace, systemtap and a brief history of "NIH". Nothing has changed so far ... systemtap is still not admin-usable, dtrace find it´s way in more and more environments and the linux community is still discussing about their way. Paul Murphy reports about the reignited discussion in his article "DTrace and the Linux bunker mentality" (refering to Bryan Cantrills DTrace on Linux article)

There is so much talent in the linux community. I don´t really understand why nobody is analysing DTrace. With analysing i don´t think about "Oh, it measures things". I think about analysing all the concept, the ideas, and the implementation. And after this implementing something on par with DTrace. But that doesn´t take place at the moment.
Posted by Joerg Moellenkamp in General at 11:49 | Comments (2) | Trackbacks (0)

Oracle and CMT

Thursday, July 24. 2008

Oracle and CMT are often a natural choice. Whenever you have many parallel requests and the latency isn´t a key performance indicator, you should give it a try. But sometimes there are loads, that should scale well on CMT systems but they don´t scale well. In most cases there are some quirks in the SQL statements that makes the code single- or few-threaded. Glenn Fawcett summarized some great tips for Oracle and CMT in a series of blog articles to overcome such problems.

(via: Stefan Hinker)
Posted by Joerg Moellenkamp in Sun at 11:15 | Comments (0) | Trackbacks (0)
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Google searches

Thursday, July 24. 2008

Strangely i found more and more google searches with my name in the logfiles of my blog and in the referer list of Xing.com in the last few days. Just in case: I haven´t done it and it´s not my fault ...
Posted by Joerg Moellenkamp in Blogosphere at 11:08 | Comments (0) | Trackbacks (0)

Sun will support *AMP

Thursday, July 24. 2008

In the press release issued yesterday was another intereting news: Sun released a new version of it´s Coolstack. It consists out of:
The primary components in the Web Stack include (partial list) the Apache HTTP Web server version 2.2.8, Apache Modules Memcached 1.2.5 (distributed memory object system), MySQL 5.1 Database, lighttpd Web server v 1.4.18, Tomcat Servlet engine 6.0.16, PHP 5.2.5, Ruby 1.8.6, Rails 1.2.3, RubyGems 0.9.0, Mongrel 1.0.1, fcgi package, RedCloth (text parsing), Perl 5.8.8 and extensions, Squid proxy server 2.16.x.
In the past it was somewhat problematic, the versions delivered with Solaris were supported, but they were selected for stability and were often bugfixed, but not updated. The versions in the Coolstack were really actual, but they were unsupported. But this changes now: Sun will announce an offer to support the complete webstack soon. At first (this quarter) for Solaris on x86 and SPARC, but later on for Linux and other operating systems.
Posted by Joerg Moellenkamp in Solaris at 07:10 | Comments (0) | Trackbacks (0)

Presto

Wednesday, July 23. 2008

The supporting movie in front of Pixar movies is a good tradition. Presto is the one before Wall-E. Absolutly hilarious.
Posted by Joerg Moellenkamp in Movies at 21:28 | Comments (0) | Trackbacks (0)

Habituation

Wednesday, July 23. 2008

What is habituation? When you borrow a portable navigation device from your brother, try to scroll through the menus and twitch through the maps like on your iPhone and think at first: "Fsck ... the display is broken" ... i want an iNav!
Posted by Joerg Moellenkamp in iPhone at 21:07 | Comments (0) | Trackbacks (0)
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Thoughts about a customer visit ...

Wednesday, July 23. 2008

Yesterday i visted a customer with severe space problems. You think: "Hey, my datacenter is full, too. Not a big deal". But those folks have really no space for euquipment, to be exact ... they have negative space for new equipment ... when they remove one or two systems the datacenter is absolutly full ;-) I thought at first, the people of the customer had a "paint it black" day when they talked about it at first ... but i have to admit, that they even vastly understated the problem. This challenge will be a hard nut to crack .... but is solvable .. i have already some ideas. Sometimes it´s a good thing to work for a technology company, because some problem must be solved by technology. And can be only solved by technology.
Posted by Joerg Moellenkamp in Sun at 20:45 | Comments (0) | Trackbacks (0)

Sun Java System Web und Proxy Server opensourced

Wednesday, July 23. 2008

Two further products gone the opensource path. Sun opensourced the Sun Java System Web und Proxy Server. Especially the webserver is interesting. It´s not that known than Apache, but´s nevertheless an excellent product.
Posted by Joerg Moellenkamp in General at 20:23 | Comments (2) | Trackbacks (0)

A great usecase for the DTrace IP provider

Wednesday, July 23. 2008

Ben of cuddletech.com reported about the Dtrace IP provider as well. A commentator challenged him with "There is nothing unpleasant about the wonderfulness that is tcpdump! You’ll need to put a lot of work in to match tcpdump’s usefulness with Dtrace… ". And Ben answered to that ... with two simple examples of the usefulness of the IP provider. He shows in his answer how you can correlate a sent package to a application on your system or how to print a complete stack trace that led to the transmission of a package.
Posted by Joerg Moellenkamp in General at 13:11 | Comments (0) | Trackbacks (0)

Rambo

Wednesday, July 23. 2008

Zumindestens Rambo - First Blood war aus meiner Sicht immer ein sehr unterschaetzer Film. Ich glaube, das liegt auch daran, das man Sylvester Stallone erst nach Copland auch mal zugetraut hat in einem Film mitzuspielen, der nicht nur aus plumper Zurschaustellung von Gewalt bestand. Das man eben primär auf die physische Erscheinung von Herrn Stallone geguckt hat, als denn auf die Geschichte, die dort erzaehlt wird. Und ob man es glaubt oder nicht, zumindestens der erste Teil erzaehlt eine Geschichte.

Nichtidentisches hat nun mit dem aeusserst lesenswerten und gelungenen Text "Rambology - Mit John J. Rambo durch die Dialektik der Aufklärung" diese dumpfe Ahnung untermauert.
Posted by Joerg Moellenkamp in Movies at 12:58 | Comments (0) | Trackbacks (0)
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About the effects of L2ARC

Wednesday, July 23. 2008

Brendan Gregg wrote a good piece about the performance of L2ARC in ZFS L2ARC:
The pool_0 disks are still serving some requests (in this output 30 ops/sec) but the bulk of the reads are being serviced by the L2ARC cache devices - each providing around 2.6K ops/sec. The total delivered by this ZFS pool is 15.8K ops/sec (pool disks + L2ARC devices), about 8.4x faster than with disks alone.
and
Our average service time is between 0.4 and 0.6 ms (wsvt_t + asvc_t columns), which is about 20x faster than what the disks were delivering.
Posted by Joerg Moellenkamp in General at 12:36 | Comments (0) | Trackbacks (0)
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DTrace IP Provider

Wednesday, July 23. 2008

At the moment tcpdump, snoop and others are the predominant tool to analyse network traffic and network problems on a host. But with the IP provider Dtrace makes the first steps to offer a tool for this class of problems as well. It found it´s way into Solaris with nv93. You should give it try and and it´s only one of the first steps ... more to come.
Posted by Joerg Moellenkamp in Solaris at 08:14 | Comments (0) | Trackbacks (0)
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VMware announces free ESX - or: The gorilla effect?

Wednesday, July 23. 2008

VMware announced a free version of their ESX server product. Well, this may be an effect of the 500 pound gorillas entering the business. Sun will announce xVM soon, Microsofts developed Hyper-V ... thus the market for it´s hypervisor may get narrow. At the end, the auxillary tools earn VMwares money, thus giving away the hypervisor is a clever move.
Posted by Joerg Moellenkamp in The IT Business at 07:28 | Comments (2) | Trackbacks (0)
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Comments

Joerg+M. about Simpsons
Fri, 25.07.2008 07:37
Nach dem 15sten mal laesst sie aber etwas nach ;-)


Olli about Simpsons
Fri, 25.07.2008 07:30
aber die Homerpalooza-Folge ro ckt!


Homer about Simpsons
Thu, 24.07.2008 20:55
Vielleicht haben sie nur die R echte an 12-13 Folgen gekauft. ..


Joerg+M. about Linux, DTrace and the NIH syndrome
Thu, 24.07.2008 14:04
Yes ... i found this comment a little bit strange, too ...


Ceri Davies about Linux, DTrace and the NIH syndrome
Thu, 24.07.2008 13:19
Made sense until he said this: "if SCO eventually wins it s case (as I’m sure it will)"


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