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0 pointsbayareaguy15y ago0 comments

I never worked with one, but I believe the HyPra system included disks (as shown on page 148. http://books.google.com/books?id=KH_kfSsMu80C&pg=PA148 ). I recall it was one of the earlier systems to achieve high transaction rates by logging updates to memories of multiple replicas (described on page 181: http://books.google.com/books?id=KH_kfSsMu80C&pg=PA181 ).

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phliar15y ago

Clustra/HADB did use disks (can't have all your data disappear if you turn off the cluster!) but a running system was in-mem in operation -- if your database was much bigger than the RAM available it was unusable. (I never used Hypra.)

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