ScaleDB and Oracle RAC are both clustered databases that use a
shared-disk architecture. As I have mentioned previously, they
both actually share data via a shared cache, so it might be more
appropriate to call them shared-cache databases.
Whether it is called shared-disk or shared-cache, these databases
must orchestrate the sharing of a single set of data amongst
multiple nodes. This introduces two challenges: the physical
sharing of the data and the logical sharing of the data.
Physical Sharing:
Raw storage is meant to work on a 1:1 basis with a single server.
In order to share that data amongst multiple servers, you need
either a Network File System (NFS), which shares whole files, or
a Cluster File System (CFS), which shares data blocks.
Logical Sharing:
This is specific to …
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Sep
18
2010
Showing entries 1 to 1