The current release of HANA requires that all of the data required to satisfy a query be in-memory to run the query. Let’s think about what this means: HANA compresses tables into bitmap vectors… and then compresses the vectors on write to reduce disk I/O. Disk I/O with HANA? Yup. Once this formatting is complete…
Here are links to several commercial posts on the Experience HANA Blog FYI… The Five Minute Rule and HANA: This is a rehash of my posts here applying the famous Five Minute Rule to in-memory databases. HANA & Exalytics: There is Barely Any Comparison: This is a rehash of my post here pointing out that…
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