In the post here I listed the units of parallelism (UoP) applied by various products on a single node. Those findings are summarized in the table below. Product Version/HW Cores per Node UoP per Node Notes Teradata EDW 6700H 16 32 Uses hyper-threads. Greenplum DCA UAP Edition 16 8 Recommends 1 Segment for each 2…
Teradata is circulating a document to customers that claims that the numbers SAP has published in its 100TB PoC white paper (here) demonstrates that HANA suffers from scaling issues associated with the NUMA-effect. The document is so annoyingly inaccurate that I have to respond. NUMA stands for non-uniform-memory-access. This describes an architecture whereby each core…
In my first blog (here) I discussed the implications of using co-processors to offload CPU. The point was that with multi-core processors it made more sense to add generalized processing hardware that could be applied to all parts of the query process than to add specialized processors that dealt with only part of the problem.…
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