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They are now preparing a test plan (like a small benchmark) to be used on all alternatives so that we can compare the results accordingly.
Les will contact Maria Luiza Campos of UFRJ (now on a one year leave of absence in Italy) to see if we can repeat the visit of Renan with a new student.
Les has requested (in January) Renan to provide an estimate of how DF bloats the data. Renan/Christiane are looking at this. Renan's pointed out "Finding RDF data size in bytes is not simple because it depends on which Triple Store will be used and how each triple is physically stored. One may store triples as plain texts, other may do as compressed data in specific formats, which would be much smaller."Once we have the number of PingER triples and how much the used Triple Store needs (in bytes) to store a known number of general triples, we may estimate PingER RDF data size.". Requested an update by email to Cristiane & Renan 2/4/2015.
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pinger.uum.edu.my is down Jan 31st, Feb 1st. Adib reports it is currently down disconnected due to a technical problem at UUM computer centre. Adib is trying to get more reliable power (UPS).to get more reliable power (UPS).
Adib has been discussing with Anjum looking at potential PingER projects. Adib has a master student. In particular they are interested in providing more flexible access to PingEr data rather than the limited time windows pingtable.pl provides. This may be by providing database access rather than using flat files. Les will provide:
- Access to Pinger Data in flat files via FTP
- Perl scripts for: making measurements, gathering the data, and analyzing the data
- Documentation on the data formats
UM
There has been no feedback to an email to Ibrahim (2/4/2015). Last we noted was:
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Ibrahim has started downloading all zip files in the local machines. 6 weeks ago he downloaded 2 GB of Weather data to test his nodes cluster, he wrote a simple Java program (Map, Reduce) to find the Average and it was working fine.
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to find the Average and it was working fine.
UNIMAS
Johari had no updates 2/4/2015. His top priorities are:
- Reviving the Raspbery Pi
- getting the research student going on
Johari still has to uncover the problem of the traceroute from UNIMAS. UDP has been unblocked. The MYREN host works fine and share most of the hops. Thus the problem must be in the first few hops.
From previous meetings
The two major issues with the Raspberry Pi would be:
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If/when it works it would be instructive to look at the data from pinger and raspberry pi to Malaysia since the distances are shorter and the differences may show up better. For Sep-Oct 2014 when there was data measured from both Oct-Nov the averages for 20 paths was 52+-21ms (from pinger.unimas.my to 20 other Malaysian hosts) and 56+-21ms for raspberry pi to 20 other Malaysian hosts.The traceroute problem maybe the same as for UTM (see below). Johari will request unblocking of the appropriate UDP ports,
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