The row-level versioning (RLV) store is an in-memory store for high-performance row-level updates. If a table is registered for RLV storage, then all LOAD TABLE, INSERT, UPDATE, and DELETE commands write directly to the RLVstore.
Multiple connections can make simultaneous updates to different rows of an RLV-enabled table. In the IQ main store, only one connection can write to a table at one time.
The RLVstore periodically, and automatically, merges its in-memory contents with the IQ main store, although you can change merge preferences. You can trigger a manual merge when desired.
With in-memory row-level versioning (RLV) for SAP® Sybase® IQ, more than one user can modify the same table concurrently, users can wait for transaction locks instead of having to retry, and a hybrid storage model optimizes data write-access, without sacrificing read-access performance.
KBA , BC-SYB-IQ , Sybase IQ , How To
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