Kyle Wu

Summer vocation is approaching and I am very excited. I searched in several websites to find cheap flight ticket. Finally, I booked ticket in Seat24.se. It’s easy to finish all the steps. I told my mother immediately.

However, I got a call from Seat24.se the day after I booked (that’s today). She said the price increased 600kr. What? I have already paid, and now, you wanted more? I refused to pay another 600kr.

Now, my ticket is gone. And my money has not returned back. I hope I can receive it tomorrow, maybe.

PS. I get my money back today, 1th April, 3 days after I received that call.

written by admin \\ tags: Sweden, ticket, Uppsala

There was a international friendly football match yesterday, that was China vs Portugal. Obviously, the result is pretty easy to guess. However, I, as a chinese football fan, would like to watch this game.

For some reason, CCTV didn’t broadcast. I searched in google, and found a great website.

In the first several minutes, the speed was very very good. Suddenly, it stopped.

You see, I should click the advertisement to continue watching the game. Great idea, ha?

I think this is not a bad idea. For one thing, when the advertisement appears, people need some time to response. It’s helpful for those slow internet connection to buffer. For another, advertisement gives tv provider great profit to support this great work.

written by admin \\ tags: tv

This is my first time using high performance machine. Although the machine is only for student, and of course, it is not good as those pro machines, it is still a good experience for me.

ssh remote machin, returns:

Last login: Wed Feb 17 15:02:15 2010 from nl103-144-35.student.uu.se
———————————————————————–

__  __          ___
/\ \/\ \        /\_ \
\ \ \ \ \     __\//\ \      ___     ___     ___ ___       __
\ \ \ \ \  /’__`\\ \ \    /’___\  / __`\ /’ __` __`\   /’__`\
\ \ \_/ \/\  __/ \_\ \_ /\ \__/ /\ \L\ \/\ \/\ \/\ \ /\  __/
\ `\___/\ \____\/\____\\ \____\\ \____/\ \_\ \_\ \_\\ \____\
`\/__/  \/____/\/____/ \/____/ \/___/  \/_/\/_/\/_/ \/____/

__                _____    ____
/\ \__            /\  __`\ /\  _`\
\ \ ,_\    ___    \ \ \/\ \\ \,\L\_\
\ \ \/   / __`\   \ \ \ \ \\/_\__ \
\ \ \_ /\ \L\ \   \ \ \_\ \ /\ \L\ \
\ \__\\ \____/    \ \_____\\ `\____\
\/__/ \/___/      \/_____/ \/_____/

Interactive cluster at Uppmax, Uppsala Universitet
Access node; os1

———————————————————————–

Hardware:
IBM X3455 dual Opteron 2220SE, 2.8GHz nodes. 4*10=40 cores
8GB RAM, Infiniband and Gigabit interconnect
Infiniband is not available for MPI programming due to system problems

Software:
Scientific Linux SL release 5.2, kernel 2.6.18-92.1.18.el5
SGE version 6.2, Grid Engine queue system
“man sge_intro” for an overview.
GCC version 4.3 c,c++,fortran and java
module load gcc
PGI version 7.2 & 8.0, 64 bit compilers (C,C++,F77,F95,HPF)
module load pgi
Intel version 10.1 & 11.1, 64 bit compilers (C,C++,Fortran)
module load intel
MPI, OpenMPI libraries, default 1.2.9, 1.3 available
module load pgi openmpi
module load gcc openmpi
mpicc or mpif90 to compile
mpirun to execute.
qsub -pe dmp8 16, to submit a 16 slot mpi job
openMP is available in pgi, intel and gcc

QUEUES and PEs:
os: 160 slots main queue (overbooked)
-pe dmp NN, distributed on nodes, 16 slots per node (4 cores)
-pe smp NN, shared memory, 1 single node for up to 16 threads (4 cores)

User Limits:
The login nodes are intended for short test runs only, max cputime is 30min

INTERACTIVE:
Use qsh to request a interactive job and recive a xterm.
e.g. qsh -l h_rt=01:00:20

**NB qlogin dont work at the moment use qsh**
(Use qlogin to execute an interactive session without starting a xterm. )

NB X-forwarding is working!
(If you have logged in with “ssh -X os.uppmax.uu.se” !!!)

Dont forget to request h_rt

————————————————————————–

News:
2009-11-20   os6 restarted due to system problems

2009-10-7/8  Service stop
New file server “bubo” introduced for all uppmax storage.
Your home directory is now in /bubo/home/h?/user.
Refer to this using “$HOME” in your programs.
To ease the transition we have defined symbolic links so that the old
directory names are usable for a short time.

2009-07-07   Compilers: PGI is updated to 9.0, default is kept as 8.0
If you want the latest version use “module load pgi/9.0″
Intel is updated to 11.1 (build 038), 11.0 (build 084) is kept as default
If you want the latest version use “module load intel/11.1″

2009-03-17      Infiniband removed from openmpi due to stability problems

2008-11-28      OS-kluster is reinstalled with SL 5.2
R is now a module to run R please load the module first
“module load R”
Sun Grid Engine updated to 6.2

I use bold font to indicate hardware.

BTW, my knowledge of Vim helps me a lot. I like Vim

written by admin \\ tags: Linux, Uppsala, UU

Wubi is a great tool which can help you install Ubuntu in Windows without changing partition. I installed Ubuntu by using Wubi. Really easy!

But, after I upgraded Ubuntu and rebooted, there was no Ubuntu login windows. What I saw is a black screen. It said GNU Grub, Minimal Bash-like shell blabla. I have to say I don’t like it, and you won’t, either.

Luckily, it is easy to find a solution. I searched ‘wubi ubuntu gnu grub’ in Google. The author of Wubi showed his solution here :

For a patch/workaround:

A) get the wubildr in https://bugs.edge.launchpad.net/ubuntu/+source/grub2/+bug/477104/comments/90 and copy it over C:\wubildr
B) ensure that when you boot there is no command “insmod ntfs”. Press “e” at the grub boot menu to edit the relevant entry and remove “insmod ntfs” before proceeding

New ubuntu/wubi installations do not contain the patch yet. The patch will only be applied once there is a clear confirmation (from you) that it actually solves the problem. Hence your feedback is appreciated.

Right, that’s it, download that file and copy it over. There are also some other solutions in which you need to type lots of commands in command line. I think, the solution of his, the author of Wubi, is better

written by Kyle Wu \\ tags: Ubuntu

Hi, everybody. I decide to change my rss management provider from Feedsky to FeedBurner. I know there is some problems to visit feedburner from China, however, feedburner gives me better service than Feedsky. If this really bother you, please accept my apologize.

This is my new rss link : http://feeds.feedburner.com/kylewu

Most of you use Google Reader. It’s quite easy to subscript feedburner in GR. In the head of Google Reader, there is a button named ‘Add a subscription’. Click it and paste http://feeds.feedburner.com/kylewu into the blank. Then click ‘Add’. That’s all, now you will catch me by using FeedBurner just like Feedsky before.

written by Kyle Wu \\ tags: Google