O |
|
Data replication by storing data | |
replication. | this method is best for applications that can accept a |
Data replication by copying to another location that is immediately accessible. | |
replication | replication is usually done by transmitting data over a link in real time or with a slight delay to |
| a remote site; this method is best for applications requiring quick recovery (within a few hours |
| or minutes). |
P |
|
cluster | A cluster in production that has packages protected by the HP Continentalclusters product. |
package alert | Time at which a message is sent indicating a problem with a package. |
package event | A package condition such as a failure that causes a notification message to be sent. Package |
| events can be accompanied by alerts, but not alarms. Messages are for information only; the |
| cmrecovercl command is not enabled for a package event. |
package recovery | A set of one or more packages with a mapping between their instances on the cluster and their |
group | instances on the Recovery Cluster. |
physical data | An |
replication | basis. Physical replication can be |
| a dedicated link (for example EMC’s Symmetrix Remote Data Facility or the HP StorageWorks E |
| Disk Array XP Series Continuous Access), or |
| disks using dedicated software on the primary node (for example, MirrorDisk/UX). |
planned downtime | An anticipated period of time when nodes are taken down for hardware maintenance, software |
| maintenance (OS and application), backup, reorganization, upgrades (software or hardware), |
| etc. |
PowerPath | A |
| PowerPath is used for M by N Symmetrix configurations using Metrocluster with EMC SRDF. |
primary package | The package that normally runs on the cluster in a production environment. |
pushbutton failover | Use of the cmrecovercl command to allow all package recovery groups to start up on the |
| Recovery Cluster following a significant cluster event on the cluster. |
PV links | A method of LVM configuration that allows you to provide redundant disk interfaces and buses |
| to disk arrays, thereby protecting against single points of failure in disk cards and cables. |
PVOL | A primary volume configured in an P9000 or XP series disk array that uses Continuous Access. |
| PVOLs are the primary copies in physical data replication with Continuos Access on the P9000 |
| or XP. |
Q |
|
quorum | See See cluster quorum.. |
quorum server | A cluster node that acts as a |
| in a data center go down at the same time. See also arbitrator. |
R |
|
R1 | The Symmetrix term indicating the data copy that is the primary copy. |
R2 | The Symmetrix term indicating the remote data copy that is the secondary copy. It is normally |
| |
(RDF Enginuity Consistency Assist) A Solutions Enabler feature to provide consistency protection | |
| for SRDF/Synchronous devices. |
| Metrocluster with EMC SRDF. |
Recovery Cluster | A cluster on which recovery of a package takes place following a failure on the cluster. |
recovery group | A failover of a package recovery group from one cluster to another. |
failover |
|
recovery package | The package that takes over on the Recovery Cluster in the event of a failure on the cluster. |
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