Comments (4)
Thanks for spotting this issue. @chengsijin0817 can you please fix that README.
@VladimirAlexiev In fact, we had completely defined and implemented a version of LinGBM based on the BSBM datasets. Unfortunately, once we started doing our first experiments with it, we realized that the BSBM data generator is not monotonic; that is, when generating datasets at two different scale factors (even with the same random seed), the smaller dataset is not guaranteed to be contained in the bigger dataset. As a consequence, we observed that query results of the benchmark queries were not monotonic at increasing scale factors. In other words, for the same query, when executed over increasingly-larger datasets, the result size was bouncing up and down randomly. Such a behavior is, of course, absolutely undesirable for a benchmark. So, we had to bite the bullet and start over again from scratch, by using LUBM this time.
Something else in your message sparks my interest: Where did see that "LUBM [...] can produce both RDBMS and RDF"? I believe that the original LUBM dataset generator can generate only RDF. That's why we extended it to also generate RDBs.
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Thanks. I have fixed the issue now (See commit #7d4c80c).
Please check it.
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Ah, I misunderstood. I've read you extended the LUBM gen, but I thought that only related to outputting a GraphQL schema
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I've read you extended the LUBM gen, but I thought that only related to outputting a GraphQL schema
Note that our extended dataset generator does not output a GraphQL schema. Instead, the LinGBM GraphQL schema has been defined manually by us, and then we have defined a mapping from that GraphQL schema to the RDB schema of the generated datasets in order to specify how the GraphQL schema has to be implemented over the datasets. (Actually, I see now that the definition of this mapping is not complete yet.)
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Related Issues (20)
- Missing placeholder for qt9 in documentation HOT 3
- License? HOT 3
- issue Query template q12.txt HOT 1
- Issue in query Template q14.txt HOT 1
- issue in query template qt2.txt HOT 5
- issue in query template qt3.txt HOT 1
- issue in query template qt4.txt HOT 1
- issue Query template QT4.txt HOT 1
- Define reporting rules in the wiki
- Optimize dataset generator
- Who has run LinGBM? HOT 3
- Finish defining the mapping of the LinGBM GraphQL schema to the RDB schema of the dataset generator HOT 2
- query parameters as string interpolation?
- document RDF generation and the LUBM ontology HOT 6
- bring back BSBM HOT 3
- Templatize query "where" clauses
- LinGBM GraphQL schema has typos
- Better checking of arguments in the query generator HOT 1
- Unify how the server URL is passed to both of the test drivers HOT 2
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