Hi, Jonah H. Harris wrote:
I'm not sure how those cards work, but my guess is that the CPU will go 100% busy (with a near-zero I/O wait) on any sizable workload. In this case, the current pgbench configuration being used is quite small and probably won't resemble this.
I'm not sure how they work either, but why should they require more CPU cycles than any other PCIe SAS controller?
I think they are doing a clever step by directly attaching the NAND chips to PCIe, instead of piping all the data through SAS or (S)ATA (and then through PCIe as well). And if the controller chip on the card isn't absolutely bogus, that certainly has the potential to reduce latency and improve throughput - compared to other SSDs.
Or am I missing something? Regards Markus -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
