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[项目新闻] [BOINC] [社会科学类] DistributedDataMining

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发表于 2010-3-5 19:56:12 | 显示全部楼层 |阅读模式
本帖最后由 qysnn 于 2016-1-1 14:09 编辑

项目官网:http://www.distributeddatamining.org/

DistributedDataMining (dDM) is the name of a research project that uses Internet-connected computers to do research in the area of Time Series Analysis and Social Network Analysis. You can support me and my research by spending computational power. All you have to do is downloading and running a free program on your computer. This program uses the idle time on your computer and shouldn't effect your daily work. During the last 7 days 20994 hours computational power were spent by 408 computers of dDM project members. I'd like to thank all project members for there generous support of my research.

该项目研究的Time Series Analysis、Social Network Analysis,大概和经济什么的有关(预测经济发展?),可以参见维基百科的某些条目:社会性网络时间序列

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 楼主| 发表于 2010-3-6 12:38:51 | 显示全部楼层
下载文件有一个16MB的jar,比较大,我下了半个小时。
貌似用java(感觉效率不高),任务管理器有两个java.exe进程。
有bug,暂停计算后java.exe并未停止,仍然占用CPU。

任务大小不一定,目前计算完的一个用了50分钟,但是计算中的一个WU一个小时才4%不到。

我运行的WU都是Time Series Analysis: Stock Price Prediction,看来是什么股价预测。
发表于 2010-3-6 13:53:09 | 显示全部楼层
似乎不能加入项目吧~
发表于 2010-3-7 11:58:26 | 显示全部楼层
3-7-2010 11-56-31 AM.png
看来项目还不稳定,大家谨慎参加。。
发表于 2010-3-7 13:36:06 | 显示全部楼层
账号有了,但是收不到取密码的邮件。。。


// 更新,收到邮件了,有点延迟而已。。。
 楼主| 发表于 2010-3-7 18:18:29 | 显示全部楼层
@4# ledled
我没有计算错误,不过因为第二个WU时间太久,就终止了。
发表于 2010-3-7 18:57:14 | 显示全部楼层
刚试了下,这个项目的计算程序会在暂停的时候退出(项目方好像说退出时会保存,但重启后却不一定是从这个保存点继续,而是之前可用的一个保存点)

比如本地参数设置中设置使用小于100%的CPU时间(我家里机器一般是70%),实现上就是不断的暂停继续计算程序,然后就会看到这个项目的计算程序(基于java)不断退出并重启。。。。
发表于 2010-3-7 19:03:03 | 显示全部楼层
另外,项目网站好像是说要1.6的jre,我机器上是1.5的,似乎也没啥问题,刚算好一个~~

9280168859447 Mar 2010 7:42:15 UTC7 Mar 2010 11:01:26 UTCOverSuccessDone716.522.172.17
发表于 2015-1-19 12:15:16 | 显示全部楼层
2014年12月10日
项目在硬件上遇到了一点问题,影响不大,正在修复

Hi there,

recently, we experienced some unfortunate problems:

1. The server hardware is old and can barely deal with the increasing load. This frequently leads to an unresponsive server. Website visitors are mainly affected since the boinc clients deal with the problem by trying to reconnect later on. The reconnects increase the problem additionally.

2. After getting back from two weeks of vacation, I realized that parts of the dDM database crashed and had to be restored. As far as I can see, we suffered no loss of important data. Maybe, some changes of user profiles were not stored.

3. The amount of dDM data increases steadily and the corresponding backup takes much more time than in the early stages of the project. As a result, the announced maintenance periods are no longer sufficient. I will think about a new backup strategy.

4. Some users reported about validation problems. I guess, this was due to the issues mentioned above. Right now, the validation of WUs is almost finished.

I apologize for any inconvenience caused by these problems.

Cheers,
Nico
发表于 2020-1-11 16:32:30 | 显示全部楼层
Dear ddm users,
we had a good run during the last years and the computing power which you provided enabled many researchers to achieve there scientific goals.

Unfortunately, I wasn't able to invest as much time as I wanted into maintaining the ddm project and although the BOINC client was working fine most of the time, the page had more and more problems which were not addressed properly. I was thinking about shuting down the project many times but there was never the right moment.

Recently, this changed when a critical vulnerability of the Drupal content management system was publicly announced. Since the ddm website was running an old version of Drupal, no fix is available for this issue. As a consequence, I took the website down. There are no indications that the vulnerability was exploited. The actual BOINC server is running on a different machine and would not have been effected anyway.

I had the choice between (1) updating to the latest Drupal version including the time consuming re-integration of all the BOINC features and (2) shutting down the project for good. I decided that this is the right moment to let it come to an end. I simply do not have the time to operate the project in the way that you would deserve.

From now on, no new workunits will be generated. The remaining units will be distributed to the BOINC clients and the incomming results will be processed as usuall. The BOINC statistics which are frequently crawled by multiple websites will stay online for a while, so that your credits won't be lost.

Thank you for your understanding and all your support during the last years.

Best regards,
Nico

此项目已于2018年正式结束
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