MemoryXtend


XAP 10 introduced a new storage model called BlobStore Storage Model (commonly reffered to as MemoryXtend), which allows an external storage medium (one that does not reside on the JVM heap) to store the IMDG data. This guide describes the general architecture and functionality of this storage model and its off-heap RAM and SSD implementations.


Overview
The BlobStore storage model allows an external storage medium (one that does not reside on the JVM heap) to store the IMDG data.

MemoryXtend for Flash/SSD
XAP provides a multi-tiered data storage architecture embedding RocksDB, which is the recommended choice for hybrid RAM-SSD clusters.

MemoryXtend for Off-Heap RAM
XAP provides a MemoryXtend configuration for tiering JVM heap with direct memory buffers.