Bolette Jurik (SB)
|Metric||Description||Metric baseline||Metric goal||2014 April 8th||evaluation date||evaluation date|
|NumberOfObjectsPerHour||Performance efficiency - Capacity / Time behaviour||18 (9th-13th November 2012)||1000||
|NumberOfFailedFiles||Reliability - Runtime stability||0||0|
|QAFalseDifferentPercent||Functional suitability - Correctness||0.412 % (5th-9th November 2012)||0.412 %|
All run on a file list of 58 files.
|max split size|| duration
||launched maps|| success
|| 37m, 58.593s = 2278.593s
|| 24m, 1.9s = 1441.9s
|| 18m, 17.917 = 1097.917
|| 17m, 3.176 = 1023.176
|| 16m, 54.703s = 1014.703s
|| 17m, 29.96s = 1049.96
The big question is why we get so many failures? The answer is of course that the list of pairs of files to compare is wrong! This list is created by Taverna beanshells, and we are missing a sort of the two output lists from the FFmpeg and mpg321 Hadoop jobs, before we combine the lists to a list of pairs as input to the waveform-compare Hadoop job. This should be a fairly quick fix...
The exact number of MR maps seem not to have a big influence on performance, as long as we have more than 12. That is as long as max split size is at most 256. We note that we get approximately twice as many launched maps for the waveform-compare Hadoop job, simply because the input list is approximately twice as big, as it is a list of pairs. We can of course adjust this to get approximately the same number of jobs, but it does not seem to be important for the performance.
The first line of tests were to decide on expected optimal max split size.
The next line of tests will use 128 as max split size and vary on the size of the input
ReliableAndStableAssessment Reliability - Runtime stability
For some evaluation points it makes most sense to a textual description/explanation
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