JBoss Community Archive (Read Only)

Infinispan 5.1

memory data grid

An in-memory data grid (IMDG) is a special type of Data grid. In an IMDG, each server uses its main system memory (RAM) as primary storage for data (as opposed to disk-based storage). This allows for much greater concurrency, as lock-free STM techniques such as compare-and-swap can be used to allow hardware threads accessing concurrent datasets. As such, IMDGs are often considered far better optimized for a multi-core and multi-CPU world when compared to disk-based solutions. In addition to greater concurrency, IMDGs offer far lower latency access to data (even when compared to disk-based data grids using solid state drives).

The tradeoff is capacity. Disk-based grids, due to the far greater capacity of hard disks, exhibit two (or even three) orders of magnitude greater capacity for the same hardware cost.

JBoss.org Content Archive (Read Only), exported from JBoss Community Documentation Editor at 2020-03-11 09:17:15 UTC, last content change 2011-07-22 13:59:04 UTC.