Japanese people, please visit the
and BOINC in Japanese
- Last updated at 2004/12/12 05:05 UTC
- fixed to be visible from Mozilla-like browsers. 12 Dec 2004
- MEX gave me corrections of typos. TNX. Feb 2004
- KC2LAD (Dave) gave me seveal corrections for my English expressions. TNX.
- Current crunching status was added.
- Ken Meyer gave me many corrections for my English expressions. Thanks.
- Moved from geocities.com at Dec 24th 2001. Visitor counter started.
- Banners improved and some notes on K7S5A added, 21th Dec 2001.
- 3rack image added, size of images reduced, 18th Dec 2001.
- Moved from home.att.ne.jp at July 2001.
- 1st appeared at 2001/01/02 22:00 UTC.
This page was first written at Jan. of 2001. The pages linked from here are for setiathome individual participants who are competing for the rank in "TOP users in somewhere". I want to show them how my analyser machines work and to encourage them to support the SETI@home research.
Also, the pages will be helpful examples to other setiathome participants who are not yet concerned with their rank, but want to automatically download, analyse and upload work-units in a "seldom ISP-connected environment".
This page is written by non-native speaker of English. Please point out inadequate or erroneous expressions to me.
( j e 2 b w m @ j a r l . c o m )
B R A G : 300,000 WUs analysed. 2004-12-11
BOINC in Japanese 2003-11-26
Started translaltion of BOINC web page into Japanese. If you are ready to read Japanese, please visit BOINC in Japanese.
B R A G : 200,000 WUs analysed. 2003-10-24
B R A G : 100,000 WUs analysed. 2002-09-21
I reached 100,000 results milestone at the 16th of Sep, 2002.
Also, my Total CPU Time had reached 100 years just before this privately monumental event.
Thanks to my pretty machines.Thanks Ken Meyer! 2002-09-07
I received many corrections from him to my Englsih expressions on these pages. Its my pleasure that I can deliver improved texts to the readers. Thanks.Time amplifier 1000times/15years 2001-01-11
I met my alumni (high school) last week. One of them is majoring in QCD and planning to build a super computer dedicated for calculations related to "CP violation" or something like that. It will be expensive and will cost over 3.5M dollars.
I asked him the question that is a taboo for SETI@home enthusiast.
Can you wait for 15 years? If you can, 1000x faster computers will solve your problem with much lower cost.
He responded, "If I wait, I cannot write my papers."
Definitely. If you wait, others will do it in advance.How can I answer this question for SETI@home? Many people think SETI is a long term project that will last longer than 50years. Why can't we wait for 15years to use lower-cost 1000x faster machines? The real question should be, when should we stop waiting for a much faster computer? If I wait 30 years, I might be able to use 1000,000x faster machine. However, I am not sure of the validty of Moore's law in such a context, and surely I want to see ETI footprints as soon as possible.
What's the AR(angle_range) in WU ? 2001-01-05
I have been read many times that the processing time required for each WU is highly dependent on the value of AR(angle range) of the WU. If the value is very low, that is less than 0.1 degree (called as VLAR), some of the SETI@home client (windows command line or so) takes much more time than regular ones (with ARs nearly equal to 0.4 .. 0.5).
My understanding of AR is here.K7S5A and CT-7SID
2001-01-03: I read a good article in Etherboot-users digest. Mr. chien-yu chen had figured out how to use the LAN devices on K7s5a for Etherboot. The key point is that handling of TxENA flag should be done with some other flags in same command register.
Since Sep 2001, I have prepared another rack for ELITE's K7S5A mother boards. But, so far, the LAN devices on this board cannot be driven in my diskless environment. Besides, next biggest problem of mine is that I still need VGA card to drive this MB. The current status I complains of can also be seen on the ML etherboot-users at 10/26/2001 and 10/07/2001 (please find the ones by je2bwm). Maybe you can find very good guide for troubles or FAQ on K7S5A on the BBS for ECS in OCworkbench. So, The next MBs I bought were Chaintech's CT-7SIDs (without embedded LAN devices nor OverClock feature, though).
I want to show you the interest I have in building my machines named "CETI-machines" for SETI@home clients. 6 PCs among these CETI-machines are shown left side.
1. Can I build powerful SETI@home clients(PC) in low cost ?
OS = Linux (initially RH6.0, now RH7.2)
Processor = Celeron,Athlon,PentiumIII-S,etc.
Less and less parts = Case-less, VideoCard-less
Remove input devices = No keyboard, No mouse
What remains? = MB,CPU,FAN,Memory,LAN card and Power Supply.
Lower cost parts = Second-hand or Junk parts, how do they cost?
Thermal problems in summer = Big cooling fan for people
Up/Downloading Scripts = FetchCache driven by crond in staggered time
Running Scripts = RunCache started regularly by crond
Dialup environment = automatic dialing only in low-cost night-period("TeleHodai" time)
3. How to manage many machines( >20) they easily crash or fail.
Centralized Store = all data on one NFS server
Shared Storage = one /usr directory shared among CETI-machines
Client Alive monitoring = Gathering output of periodic "ps" on each CETI-machine
Account of results = Rough report from output of RunCache
If something wrong found = telnet, restart crond, sending HUP to client
If I can't login = ping and finally reboot,or hardware trouble
Hardware and temperature Monitoring = LMSensors
Clock Synchronization = ntpdate command
Power Dissipation = Dual CPU machine
Noisy fans = Low voltage driving
Compact installation = bookshelf a substitute for professional rack
Batch startup/shutdown = WakeOnLan and shutdown resident agents
5. Simple tools for CETI-machines
UV-PROM Writer (Kit for electronic enthusiast)
UV-PROM Eraser ( No timer, Paper cased)
Diskless client = Etherboot, Netboot
UV-PROM Writer Kit in Japan = akizuki densi tsusho
7. Another contribution to setiathome: SETI@home store
http://www.exploratoriumstore.com/setihome.html
