Wednesday, April 04, 2007

Status Report for 03/29/07 tto 04/04/07

1. STFILTER portlet
I'm updating analyze_tseri web service to use a bean as an input parameter. Accordingly STFILTER portlet will be updated soon.
As for the next step, I'm planning to upgrade STFILTER portlet as follow:
a. Adding more options on filter parameter.
b. Using property file, instead of web.xml or portlet.xml
c. Modifying project management
d. Fixing some bugs when clicking "edit" mode button.

2. Network Weather Service
After installing nws package from NWS website, I found a NWS command for extracting inter-machine bandwidth and latency measurements as follow:
$ html-hosts -N nws.cs.ucsb.edu sperm.cs.ucsb.edu beluga.cs.ucsb.edu









Source machine
Destination machine
sperm.cs.ucsb.edu beluga.cs.ucsb.edu
sperm.cs.ucsb.edu


bw
forecast
error
lt
forecast
error

-
-
-
-
-
-
86.10412000
86.10059000
1.759016353
0.429000000
0.370000000
0.091088105
beluga.cs.ucsb.edu


bw
forecast
error
lt
forecast
error

85.42371000
85.52822000
4.072307805
1.648000000
1.702000000
0.320489947
-
-
-
-
-
-
Bandwidth values are measured in Megabits/second; latency in milliseconds




However, I haven't found yet if I can use this command more generally, for example, in TeraGrid clusters. It seems like if I know a name server of a cluster, it will be possible to get network bandwidth information. But, I don't know how I can get list of such name server. I will dig into that more.

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