Clustering
Server Clustering offers redundant hardware components, as well as software that provides automatic fail over of hardware
and content replication, ensuring that your applications are always available. We offer full support for Windows with
Microsoft SQL and Solaris or Linux AS with Oracle clustering solutions.
Benefits of a SQL Cluster
Automatic Fail Over
When Microsoft Cluster Service detects that the hardware, software or network connectivity of the primary node fails,
it automatically transfers the active SQL Server resources to the passive node. All client traffic is then redirected
to the standby node, and all committed transactions are then available to the client. End users only notice a momentary
pause in service.
Rolling Upgrades
With a clustered SQL Server, downtime for upgrades or patches is minimized because the idle node can be upgraded first
and rebooted without causing downtime for the active node. Once the upgrade is complete for the idle node, SQL Server
resources are transferred to the upgraded node, while the once active node is upgraded. When you take advantage of
SureManaged™ Services these upgrades can be automatically performed for you.
Redundancy
Every controllable aspect of the cluster is redundant, dual power supplies, dual power circuits, SCSI RAID,
and dual storage controllers.
Business Resumption
When a SQL Server cluster is coupled with disaster recovery options such as off-site backups or SQL Server log shipping,
your data can be recovered in minutes rather than hours or days.
Uptime Uptime Uptime
The above benefits combined with DataPipe's extensive experience with SQL and Oracle Server clustering allow us to offer
unrivaled uptime for your vital data.
Benefits of an Oracle Real Application Cluster
Oracle Real Application Clusters are the multi-node extension to Oracle database server. They enable
e-businesses to build a multi-node database server that is highly available and highly scalable. An e-business does not
need to sacrifice scalability or performance for high availability with clustered database.
The benefits of building a database with a cluster of smaller nodes over building one with a single larger node are:
1) Flexibility and cost effectiveness in capacity planning, so that a system can scale to any desired capacity
2) Fault tolerance to partial failures within the cluster, especially the node failures.
Scalability
Oracle cluster database gives users the flexibility to add node(s) to the cluster as the demands for capacity increases,
scaling the system up incrementally to save costs in capital investments and eliminating the need to replace smaller single
node systems with larger ones. It makes the capacity upgrade process much easier and faster since, in most case, one or more
nodes with similar or identical configuration are added to the cluster, compared to using completely new and larger nodes
to upgrade systems.
The Cache Fusion technology implemented in Oracle Real Application Clusters enables capacity to be scaled
up close to linearly.
High Availability
Another main advantage of the cluster architecture is the inherent fault tolerance provided by multiple nodes. Since the
physical nodes run independently, the failure of one or more nodes should not affect other nodes in the cluster. In the
extreme case, a cluster system can still be available even when all but one node survives, making a system based on
cluster highly available. This architecture also allows a group of nodes to be taken off-line for maintenance while the
rest of the cluster continues to provide services online.
Oracle cluster database takes full advantages of this inherent fault tolerance architecture to provide
a highly available database server.
|