Introduction:

This test regards the new smartmove feature introduced with MP3:

Enviroment:

OS AIX 5300-07-02-0806
Storage Fondation 5.0MP3RP1
Storage 2 LUNS XP24K 100GB

Test:
Mirror an empty filesystem

Initial situation:

diskgroup with a volume of  97.615 GB

root@/ #vxprint -Qqthg smartdg
dg smartdg      default      default  3000     1239178875.70.tx088sd1
dm disk0        xp12k0_0     auto     65536    204713728 -
dm disk1        xp12k0_1     auto     65536    204713728 -
v  smartvol0    -            ENABLED  ACTIVE...

Hello from the Storage Foundation/High Availability Technical Product Management team, and welcome to the new Symantec Connect!  In this first VCS blog entry under the new format, we'll take a look at reducing the cost of HA by building larger, more "intelligent" clusters.

When most people think of clustering, they think of a 2-node, active/passive cluster in which a mission-critical application runs on one system (the active node) while a stand-by system (passive node) is ready to take over if something fails on the active node.  This approach works fine in an environment with one or maybe two mission-critical applications, but consider the costs of this approach in an environment with 10 or 15 or 20 mission-critical applications.

To avoid the costs of excessive hardware sparing, an "N+1" approach is often implemented in which "N" represents the number of active nodes and "+1" represents a single spare (idle) server....

Written by: Thomas Cornely

What’s the Hardware Zero Reclaim functionality?  It basically refers to the array’s ability to scan a thin lun and look for pages of physical storage that contain ‘all zeroes’. When they find such a page, they reclaim the page (i.e. detach it from the thin lun) and put it back in the free pool. They can do this because the array returns ‘0’ to any I/O read it received on ‘unallocated space’ in a thin lun.

Who’s doing it?

Most hardware vendors are coming out with similar functionality. IBM XIV was the first one to have it. 3PAR has it. NetApp has it (they actually have true dedup in the array). Now Hitachi has it.

What are limitations of the Hardware Zero Reclaim functionality?

Hardware Zero Reclaim relies on the presence of 0 in the array to do the reclamation. In the context of a thick to thin migration, the process would be as follows:

• start with 1...

Symantec's Dan Lamorena, Senior Product Marketing Manager, and Eric Hennessey, Director of Technical Product Management, introduce Veritas Cluster Server One.

Eric: Veritas Cluster Server One is the next evolution of Veritas Cluster Server, and its development has been driven by customer needs.

Veritas Cluster Server in its current form and architecture has been out for several years, and we found that we were starting to see limitations in what we could provide customers in very large, advanced environments-particularly those customers who are at the forefront of technology development and are quick to adopt new technologies to solve business problems.

These customer environments are multi-tiered. That is, they have a database server running on one OS platform, a middle tier application running on another, and a web tier on yet another. Veritas Cluster Server One gives these customers and their multi-tiered environments the ability to...