Priority Optimization; Automatic And Transparent Failover - HP 3PAR StoreServ 7200 2-node Manual

takes about 30 seconds, and booting takes an additional 5 seconds. Rekeying under a light load
takes about 15 seconds.
CAUTION:
Keep the encryption key file and password safe. If you lose the encryption key and the HP 3PAR
StoreServ system is still functioning, you can always perform another backup of the encryption key
file. However, should you lose the encryption key file or the password, and should the HP 3PAR
StoreServ system then fail, the HP 3PAR StoreServ system will be unable to restore access to data.
Ensure that backup copies of the latest encryption key file are kept and that the password is known.
The importance of keeping the encryption key file and password safe cannot be overstated. HP
does not have access to the encryption key or password.
Different arrays need separate backups, although the same password can be applied.
The SED DataStore provides an open interface for authentication key management. DataStore
tracks the serial number of the array that owns each SED, which disallows SEDs from being used
in other systems.
NOTE: The HP 3PAR data encryption solution will help mitigate breach notifications under the
Health Information Technology for Economic and Clinical Health (HITECH) Act, but is not compliant
with the Federal Information Processing Standard (FIPS) 140-2.

Priority Optimization

During recent years, consolidation of storage systems has reduced complexity of data storage,
delivering efficiency in management, occupied floor space, and energy consumption. However,
the consolidation of many disjoint workloads into a single storage system also results in contention
for shared system resources on the system.
Examples of such shared resources include front-end host Fiber Channel (FC), iSCSI and FCoE
adapters, back-end FC or SAS disk connections, physical disks, data and control cache, ASICs,
CPUs, and backplane interconnections. Data packets arriving at the front-end FC HBA adapters
are handled on a first-come, first-serve basis. On the surface, this may sound fair, but it can lead
to unequal and inconsistent throughput for multiple concurrent workloads.
HP 3PAR's Priority Optimization software manages and distributes the I/O capacity of an HP 3PAR
StoreServ Storage system across multiple workloads. The tool enables the co-location of the data
of workloads of different types, such as sequential, random, online transaction processing (OLTP),
with different I/O packet sizes on a single storage system while achieving adequate and stable
performance in a multi-tenant environment.
HP 3PAR Priority Optimization software introduces quality-of-service rules to manage and control
the I/O capacity of an HP 3PAR StoreServ Storage system across multiple workloads. Application
of the rules enables co-location of the data from workloads of different types (such as sequential,
random, and transactional, among others), with different I/O packet sizes on a single HP 3PAR
storage system. The use of QoS rules stabilizes performance in a multi-tenant environment.

Automatic and Transparent Failover

Automatic transparent failover (ATF) technology with HP 3PAR Peer Persistence is available for
VMware configurations in version 3.1.2 MU2 of the HP 3PAR OS software. ATF is the ability to
automatically redirect host I/O from a failed primary system to the replicant secondary system in
a manner that is transparent to the host and causes minimal disruption to service.
The failover—in which the target volume group becomes source, and, providing the source array
is available, the source volume group becomes the target—is transparent in that it is non-disruptive
to the hosts and applications running on them. The failover is automatic in that failover can occur
without user intervention as long as the failover conditions are met.
Priority Optimization 59