LHC@home

Yesterday I got my quota of 10 work packets. In my results are only seven. My "results" shows the most recent as "25 May 2008 15:51:55 UTC" but I know I had some queued up after that time.

For example, work unit 2677126:

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2677126

yesterday said:

Workunit
application	SixTrack
created	25 May 2008 12:41:46 UTC
name	wm72zs_m72zs__36__64.31_59.32__20_22__6__10_1_sixvf_boinc368156
canonical result	13722192
granted credit	8.43
minimum quorum	3
initial replication	5
max # of error/total/success results	10, 20, 10
Result ID	Computer 	Sent 	Time reported or deadline	Server state  	Outcome  	Client state  	CPU time (sec) 	claimed credit 	granted credit
13722192 	9615190 	25 May 2008 12:41:54 UTC 	25 May 2008 15:51:55 UTC 	Over 	Success 	Done 	4,798.78 	8.43 	8.43
13722195 	9632096 	25 May 2008 12:41:54 UTC 	1 Jun 2008 4:14:08 UTC 	In Progress 	Unknown 	New 	--- 	--- 	---
13722193 	9621478 	25 May 2008 12:41:55 UTC 	25 May 2008 18:27:07 UTC 	Over 	Success 	Done 	5,755.58 	11.91 	8.43
13722196 	8485526 	25 May 2008 12:41:55 UTC 	1 Jun 2008 4:14:09 UTC 	In Progress 	Unknown 	New 	--- 	--- 	---
13722194 	9637875 	25 May 2008 12:41:56 UTC 	25 May 2008 14:24:44 UTC 	Over 	Success 	Done 	5,180.44 	8.35 	8.43

and now says:

"Unable to handle request
can't find workunit"

Another one is 2679049

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2679049

which had results:
13731824
13731822
13731826

which had 10.22 credits. Yesterday they were there - now they all say:

"Unable to handle request
No such result"

Why are work units and results disappearing?

---

Work units that have definitely disappeared since yesterday:

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2677126
8.27 credits

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2679049
10.22 credits

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2680200
0.97 credits

---

Why are work units and results disappearing?

Workunits are removed from the master database when all five results are returned. This ensures that the database remains as small as possible so that performance doesn't suffer. The results are still available to the project scientists.

Hope this helps

Michael