The network load's slow growth pattern can be explained by the fact that the publication requests generated in this test all carried a small XML payload (description document of 2 virtual resources), thus not imposing a high overhead on the network.
For each trial, we sent one resource publication request containing a document describing 2 virtual resources.
As shown in Figure 15, the resources' publication operation shows a polynomial (quadratic) growth pattern in terms of response time, which ranged from 204 ms for 1 publication request to 1 minute and 50 seconds for a 1000 publication requests.
As for the generated network load, it showed a logarithmic growth pattern with values ranging from 26 KB for 1 publication request to 240 KB for a 1000 publication requests.
Upon receiving a resource publication request, the publication engine validates and parses the resource description, and stores the received document in its XML text format in the database.
Upon receiving a resource publication request, the publication engine validates and parses the resource description, and stores the received documents as is in the database.
As the number of publication request increased, the response time to process the requests increased in an exponential fashion, while the network load increased in a linear fashion.
In the table, the response time for resource publication is calculated at the PMN as the difference between the time when the PMN's publication module sends a publication request and the time it receives a response from the BN.
As the number of publication request increased, the response time to process the requests increased in a quadratic fashion, while the network load increased in a logarithmic fashion, when two PIP nodes were used as message generators.
