The document defines different types of storage based on how actively the data is used: - Primary storage contains active data that is frequently accessed with high performance requirements. - Secondary storage contains inactive data that is less frequently accessed with longer recovery time objectives. - Nearline storage contains backups of active data for disaster recovery with medium term recovery point objectives. - Offline storage contains archives of inactive data for long term storage with infrequent access and long term recovery point objectives.

1. HP Storage Portfolio, …a simple decoder

2. Friday, November 09, 2012
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Storage Architecture Key Concepts
Primary Storage (Active)
Secondary Storage (Inactive)
Nearline Storage (Backups)
Offline Storage (Archive)
Software
Software
“Mission Critical”, “Business Essential”, or
“Online” importance (See Next Page).
Block/Structured (SAN) or File/
Unstructured (NAS).
Specified performance requirements/TIERs.
Frequent, short term RPOs.
Sync / Async replication.
Typically random I/O patterns.
Local scheduled software-driven archives of
Active data files, typically used for data
retrieval purposes.
Medium/long term life cycle.
Less frequent, medium/long term RPOs.
Typically a “streaming” workload.
Data often deduplicated.
Regular, short/medium-term offline and
off-site copies of Active Data typically used
for Disaster Recovery purposes
Defined regular Remote Recovery Points
Sync / Async Replication
Remote scheduled backups/archives of
Active Data files.
Infrequent, long term RPOs.
Synchronous / Asynchronous Replication
On-Premise
Off-Premise
Block(SAN)orFile(NAS)
TargetedMedia(Tape,VTL,NAS)
On-Premise
Off-PremiseAsynchronous Replication
RPO – The “recovery point objective” (RPO) is the maximum tolerable period in which data might be lost from an IT service disruption or component failure.
RTO – The “recovery time objective” (RTO) is the duration of time and a service level within which a business process must be restored after a disaster (or
disruption) in order to avoid unacceptable consequences associated with a break in business continuity.
StoreServ / StoreVirtual /
StoreEasy
StoreServ / StoreVirtual /
StoreEasy
StoreOnce
StoreOnce / StoreEver
I = C + P + F + A…
I = Investment
C = Capacity
P = Performance
F = Features
A = Availability