Tuesday, September 8, 2009

How to differentiate RHEL releases correctly

Please take note, this artical is only focusing on Server relate product, not Desktop product.

Before RHEL5, we usually talked about AS & ES for server editions.

  • AS: Red Hat Enterprise Linux AS ("advanced server")
  • ES: Red Hat Enterprise Linux ES ("entry/mid server")

Key limitations with RHEL3 ES (kernel foundation Linux 2.4.21)

  • Maximum 2 CPU sockets
  • Maximum 8 GB RAM
  • No support on IBM Power

Key limitations with RHEL4 ES (kernel foundation Linux 2.6.9)

  • Maximum 2 CPU sockets
  • Maximum 8 GB RAM
  • No support on IBM Power

Start with RHEL 5, Redhat starts to use "RHEL" and "RHEL Advanced Platform" to replace "ES" & "AS".

Key limitations with RHEL5 (kernel foundation Linux 2.6.18)

  • Maximum 2 CPU sockets
  • Maximum 4 virtualized guests/instances
  • No support for Storage virtualization (with Red Hat GFS and Cluster Suite)

Reference:

http://www.redhat.com/rhel/compare/

http://www.redhat.com/whitepapers/rhel/RHEL3FamOverWPSO.pdf

http://www.tips5.com/difference-between-as-ws-es-and-desktop-of-redhat-enterprise-linux