Month: April 2010

My evolution to Mac #Mac #VMWare


I have been using computers, to some degree, since my parents bought the family a Commodore 64 in the early 80’s.  I would spend many afternoons just playing around.  For me it was just something to occupy time … really not much different then the Atari 2600 that we bought soon after.  It wasn’t until college that I started using computers on a daily basis and really got pulled in (or bitten by the bug).  In college we had access to Windows, Apple, Vax/VMS and Unix (SGI’s Irix).  Windows was familiar (Apple was not … although we had a brief encounter in the 3rd or 4th grade … Apple IIe), I liked the power of the Vax … the SGI’s were a something in a class all to themselves.  With Irix you had a truly kick-butt UI … but you had the shell at your finger tips.

After college it was mostly Windows and then I started to use Linux more often … first Redhat and then Ubuntu.  Ubuntu is great but the UI has always been pretty lame.  Sure you can tweek it and make it look like anything you want, which is great.  My biggest issue with Ubuntu (or any version of Linux) is lack of MS Office.  I use MS Office daily and also need software like Project and Visio.  Of course there are all kinds of open source alternatives but the need to collaborate with others that are most likely using MS Office makes this a precarious adventure at best.  I worked on one project where we were passing a document back and forth.  I was using OpenOffice and everyone else was using MS Word.  We lost a lot of hours having to fix the formatting each time I edited the document … it’s not worth the time lost.  So, the last 4 years have been a battle (for me) between Windows and Ubuntu.  I kept switching back and forth … sure I can dual boot but it’s a pain to have to do that and lost time while rebooting.  Virtual Machines are an option too … but fundamentally I have a problem with kicking off another OS to perform a single task.

I switched to a MacbookPro a few months ago and I would have to say that this is pretty close to what I am looking for in an OS.  The UI is nice, I have access to the bash shell when ever I want it.  The performance is fantastic.  There are a few gripes (close window button locations) but for the most part it’s good.  I haven’t even thought about Windows or Ubuntu since I started using the Mac.  The big issue for me right now is not having Visio … I still need to have a Windows VM with Visio.   I hesitated for a long time before getting a Mac because of 1) Cost and 2) Was afraid of a ho-hum experience.  I did turn on my Windows 7 laptop the other day to work on VMWare because I was concerned about compatability of the image ( I have to provide to someone who will install on ESX).  I was assured that there is a migration process which is good … because I had to switch back to the Mac because the performance on the Win 7 (Dell Latitude with 4GB of RAM) was horrible.  I have two VMs running now on the Mac … it’s a little laggy but not too bad.  I am pricing out an upgrade to 8GB as well … I think that this laptop will scream with 8GB of RAM.

[Update 5/22/10 5:31pm]

VM’s made in Fusion (on MBP) migrated very easily to an Ubuntu based VMWare Workstation.  Very few changes were required:

1) Before starting I changed the Display (VM – Guest) to the lowest available (it was set to use the Host’s).

2) After booting I installed vmware-tools

3) Rebooted the Guest OS.

That’s it … dead simple.

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Debugging OVD 11g Installation #Oracle #IdM #OVD


I am installing Oracle Virtual Directory 11g on Oracle Enterprise Linux 5.  As the OVD installer ran through it’s Configuration Tools it stumbled on the Create ASInstance step with the following error:

Error creating ASInstance asinst_1.
Cause:
An internal operation has failed.  Unable to validate
NonJ2EEManagement Application deployment on admin server.
See logs for more details.

I thought maybe I had forgotten to start Weblogic, but that is not the case.

I will be working through this issue this afternoon … possibly this evening depending on how this afternoon goes.  If you have seen this before drop a commant, I’d love to here some feedback.

<Update>

Deborah Volk pointed out that I needed to use the latest version of Weblogic server.  I believe that is cased closed.

Oracle OAM Identity Server errors starting on OEL5 #Oracle #IDM #OAM


I am installing Oracle Access Manager 10.1.4.3 on Oracle Enterprise Linux (OEL) 5.  When I tried to start the Identity Server for the first time I received the following error:

# /opt/oracle/oam/identity/oblix/apps/common/bin/start_ois_server

Using Linux Threading Library.

/opt/oracle/oam/identity/oblix/apps/common/bin/ois_server: error while loading shared libraries: libdl.so.2: cannot open shared object file: No such file or directory

rm: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory

OIS Server started with pid: 3344

/bin/sh: error while loading shared libraries: libdl.so.2: cannot open shared object file: No such file or directory

I found that by commenting out the following line from the start_ois_serverfile that I was able to start the identity server without errors:

#      LD_ASSUME_KERNEL=”2.4.19″;

[Update]

Commenting out that line works but another solution is to use the following Oracle provided script to start OIS instead:

./start_ois_server_nptl

I am not really sure what NPTL (Native Process Threading Library) is … but was told that NPTL runs on 64 bit.

The cost of wind power #wind #energy


This is way off topic for my normal posts which are usually about Identity Management and Information Technology but I have been interested in learning more about wind power (as an energy source) for some time. While I still do not have an understanding of how the cost compare to other energy sources but I was curious enough today to do a little (unscientific) research and try and figure out what the cost of wind power for the United States would be.

This study is not meant for anything else but to try and wrap my head around the costs. I don’t take into consideration the fact that some areas of the country do not have sufficient wind nor do I take into account areas that all ready utilize wind power. I say this because I am not looking for people to respond with things like, “yeah but area X doesn’t have enough wind” or anything along those lines. I would however invite people to correct my calculations, provide updated information or provide other sources for more information. That being said, here are my calculations:

In terms of wind power 1 mega-watt (MW) is enough power for approximately 225/300 houses/year (http://www.awea.org/faq/wwt_basics.html#How many turbines does it take to make one megawatt (MW)) ( I used the low number for the rest of my calculations ).
Wind turbines are generally available in 700KW and 2.5 MW sizes. A set (farm?) of ten (10) 700 KW turbines produce about 7MW/year or roughly equivalent to 1,575 homes. (remember I am using the low number). A set of ten (10) 2.5 MW turbines produce 25 MW/year or enough electricity for 5,625 homes.

According to the 2008 census (need a fact-check here) there are 112 million homes in the United States (http://answers.yahoo.com/question/index?qid=20080922171135AAc4rXW). Using the larger size turbine, this many homes would required 19,911 units of ten (10) or approximately 119,110 turbines. Now, this is where it became very interesting for me. According to
http://www.windustry.org/how-much-do-wind-turbines-cost the 2MW sized turbines (need more fact checking here) cost approximately $3.5 million installed. One thing to note here is that some of my other sources, which I will provide, refer to a 2.5 MW sized turbine where as www.windustry.org mentions a 2 MW sized turbine. I don’t know what the difference is but I will try to find out. So, based on these numbers for 119,100 turbines at $3.5 million/unit the total cost is some where around $416,885,000,000. That is to install … there is also the maintenance and other related costs.

It will be interesting to compare this with other sources of power and to try and understand the numbers a little more.