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LaniTeshima
Product and Topic Expert
Product and Topic Expert
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The following provides a list of commonly used terms you encounter as you use the SAP HANA dynamic tiering option and read its documentation.

TermDescription
Cold dataData stored on-disk.
Column storeContains in-memory HANA tables.
Column-store tableA type of HANA table. Resides in the column store.
DbspaceA logical name for a container of files or raw partitions within extended storage.
Default storeIs the HANA column store.
DeltaFor dynamic tiering, refers to row-level versioning.
DELTA MERGETransforms delta storage data into a format optimized for read performance and memory consumption, and transfers it to main storage.
Delta storeFor dynamic tiering, write-optimized, in-memory store that works with the extended store. Delta stores use row-level versioning to allow concurrent table changes by multiple users without transaction lock waits.
Extended storageContains on-disk dynamic tiering extended tables.
esserverThe name of the dynamic tiering service.
Extended tableA type of dynamic tiering table. Resides in extended storage.
hdbesserverThe executable for esserver.
Hot storeThe SAP HANA in-memory store.
IMPORTImport catalog objects (tables, views, synonyms, sequences, procedures) that have previously been exported from dynamic tiering.
IMPORT FROMImport external data from a CSV file into an existing extended store table.
Main storageThe part of the column store that contains the main part of the data, compressed and optimized for read access.
Row-level versioning (RLV)Allows more than one user to modify the same table concurrently.
Warm storeExtended storage.

For general concepts as they relate to dynamic tiering, a good place to start is the Master Guide, available through our SAP HANA Dynamic Tiering Help Portal page.