Why is SAP HANA So Faster?

Regular RDBMS technologies put the information on spinning plates of iron (hard disks) from which the information is retrieved. HANA stores information in electronic memory, which is some 50x faster (depending on how you calculate). HANA stores a copy on magnetic disk, in case of power failure or the like. In addition, most SAP systems have the database on one system and a calculation engine on another, and they pass information between them. With HANA, this all happens within the same machine.




Tags: HANA Jet speed, MPP, Near Zero downtime, Columnar storage, In memeory computing engine IMCE,
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