In today’s Oracle 10g training, we were asked to do a exercise on tablespace. I needed to make a tablespace Read Only and Read Write. The syntax was simple, just “ALTER TABLESPACE tbs READ ONLY (READ WRITE”. But while I was playing around, I thought what would happen on the data file after I turned on the Read Only with the tablespace. So I checked the data file (like c:\oracle\oradata\something.dbf) and found out it did not have Read-only attribute even after I altered the tablespace as Read Only. Interesting, it seems the Oracle did not look up the OS level when it deals with the tablespace read-only attributes.
To make things more interesting, I turned on the Read-Only attribute for this tablespace’s data file (Right Click, and check the Read-Only in the proprieties window). Then I went ahead to make more alterations on the tablespace, like increasing the extents size etc. The funny thing was I could see these system changes in Oracle through some dba_ views, but actually they did not take effective. Since I could not insert any new record to a full tablespace even I “successfully” increase the size in Oracle.
Not sure Oracle already aware this situation or not.
I need to post a serial how-to in Outlook for some of my clients. This one is part of “how to create email distribute list” and copy & paste from 
Since only NBC has the exclusive authorization to broadcast all Olympics 2008 games in America, and it only shows American team games at evening prime times. It is very hard to watch some interesting games at real time if they do not have American team participation and not take part in American prime time. I thought I could do it from the internet like before. But this time unfortunately the normal way of watching stream video online does not work since all official Olympics partner websites only open to China region users. That means these video sites block all overseas IP addresses from watching games live.
I tried to write up a 3-step How-Tos for getting VOIP through broadband 3 years ago, but never got a chance to finish them. Today, one of my friends asked my help on setting up his home networking over Comcast cable broadband. Then I decided to use some time now to point out one or two important things in the should-be-published-early first step - "how to set up a home network over your broadband without paying extra to your provider".
I tried to add a CheckBox control to the registration page in my newly implemented open source YetAnotherForum asp.net application. And this CheckBox is for Terms and Conditions agreement, so it needs to be checked before the users submit registration form. It looked like the easy way was to use a RequiredFieldValidator to validate the CheckBox control. But unfortunately this RequiredFieldValidator validation Web control does not work with the CheckBox (or CheckBoxList) Web controls. After I set its ControlToValidate property to the ID of the CheckBox, the page threw an HttpException, saying: 
As 
Since this late noon, all of my domains on the Microsoft Windows Hosting server at 1and1.com could not be accessed. I called the tech support and was told all A records of my domain names have been pointed to an external IP address (82.165.204.153). Even I swore to the tech support that I did not make any changes on my DNS setup, but she insisted that only the owner of my account (of course, me) can do such changes. And I asked whether they could do some investigations to see who and when made such changes from logs, but I could not get any satisfied answer from her. Anyhow, the important part at this moment was to get all my domains back. So I had to manually change all A records back to my hosting server’s IP addresses. I was glad I only host less than 20 domains on this Microsoft platform, image I would have to change my Unix hosting domains (Shhhhh).
Have you recently used Google Maps? Maybe you already noticed its new feature from the maps, yes, it is called Street View. What can it do? well, when you browser the maps (of course, on the website of http://maps.google.com) and click the Street View button on the map. You will see a little man icon on the map, and some street view photos will appear when you drag “you” (the little man) on some blue line highlighted roads. These photos just like what you can see when you walk or drive on the road of the Google maps.
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