As described in the prior post, the shared-disk performance
dilemma is simple:
1. If each node stores/processes data in memory, versus disk, it
is much faster.
2. Each node must expose the most recent data to the other nodes,
so those other nodes are not using old data.
In other words, #1 above says flush data to disk VERY
INFREQUENTLY for better performance, while #2 says flush
everything to disk IMMEDIATELY for data consistency.
Oracle recognized this dilemma when they built Oracle Parallel
Server (OPS), the precursor to Oracle Real Application Cluster
(RAC). In order to address the problem, Oracle developed Cache
Fusion.
Cache fusion is a peer-based shared cache. Each node works with a
certain set of data in its local cache, until another node needs
that data. When one node …
Showing entries 1 to 1
Aug
02
2010
Showing entries 1 to 1