About deduplication, If you have read carefully, DP doesnt have deduplication exactly, it has Advanced to Disk backup, whichi is fine, and gives You Virtual Full backups based on incrementals. But thats all i know. No real deduplication without using external storage/communication devices supporting deduplication
Thanks for the imput, I just read another artikel about HP dataprotector in combination with VLS. VLS is capable to perform deduplication processes.
Key Message: Scalability, Consolidation and Data Centre resilience
In this scenario the volumes of data involved at the regional data centres are significantly high and
the need for scalability paramount. HP’s enterprise level Virtual Tape Libraries (VLS) are therefore
used because in terms of deduplication (the technology enabler for low bandwidth replication) the HP
VLS accelerated deduplication is able to scale much higher in terms of capacity and performance
than the HP Dynamic deduplication used on HP D2D systems.
The ROBO to regional centre solution is the same as in Scenario 2 but instead of local regional data
centre backups being done to D2D because the regional data centre volumes are > 30TB they are
now backed up to a local VLS9000 device. VLS systems also support Low Bandwidth replication and
currently support up to 4 to 1 fan-in, so we can consolidate replications from several regional data
centres in a single VLS9000 device at the main data centre. The VLS9000 uses a multi-node
architecture to ensure scalability in terms of backup performance, deduplication performance and
replication performance. Because of the higher volumes of replicated data involved however the low
bandwidth links for VLS are typically in the area of 100 Mbits/sec upwards. This solution with VLS
allows consolidation at the main data centre, the VLS9000 there is used both as a replication target
for the 4 regional data centres AND for main data centre backups as well, providing a very good
consolidated solution. Deduplication is a licensable feature on the VLS range , and low bandwidth
replication licencing is only required at the target site(one licence per node).
Replicated cartridges from the regional centre arriving at the VLS target in the main data centre send
an Email on an hourly basis to the Data Protector Cell manager at the main data centre. Data
Protector scripts then import these newly replicated tapes into the backup catalog at the main data
centre to allow easy access to replicated data in the event of disaster recovery being necessary for
the regional data centre.
Should it be required for compliance or archiving HP Data Protector Cell manager 1/Media Server at
the main data centre can easily copy any content from the VLS to Physical tape.
A further enhancement to this scenario would be to have Active <-> Active replication where the
main data centre backups to the VLS are also replicated back to the regional data center giving the
main data centre a very cost effective disaster recovery process using existing infrastructure.
Because of the different nature of D2D & VLS deduplication technologies it is not possible for D2D
units to replicate directly into a VLS unit.
The disaster recovery options for the regional data centre using VLS are identical to those used for
a) Re-building regional server and restoring data to it at the main data centre using the data
replicated to the main data centre VLS.
b) Rebuilding the server at the regional site and reverse replicating the critical data from the
VLS in the main data centre. Although this will be limited to several TB max, because of the
replication link being the bottleneck to high capacity restores – for reverse replication the
“entire” contents of a virtual tape are reverse replicated.
c) Offloading critical data to physical tape at the main data centre and transporting physical
tapes and associated hardware back to the regional data centre for import and recovery.
Again with the higher volumes of data involved between regional data centres and main data
centers HP expect the usage model for VLS to VLS replication to be predominantly
A dedicated replication link – not shared with application traffic
24 Hour replication window available.
VLS replication sizing is also fully supported in the HP StorageWorks sizing Tool
The key benefits to the customer of this solution are:-
Fast local recovery when needed at both ROBO, regional data centre and Main data centre.
Option for ROBO data to be copied to VLS in regional data center for onward replication to
main data centre.
Ability to store several months of backups locally at regional data centre and main data
centre using VLS accelerated deduplication - scalable to very high volumes.
Cost effective consolidation in the main data centre, up to 4 regional VLS units (fan-in) AND
VLS at main data centre can be used for local main data centre backups as well.
Very Flexible Disaster recovery options.
Easy offload to tape with HP Data Protector Object copy.
HP Data Protector manages the entire process from the main data centre.
Main Data centre DR capability if active<->active replication is deployed in the future, using
The three scenarios described above give an insight into the various ROBO & regional data centre DR
deployments possible using HP storage components:-
HP Data Protector product features ( synthetic full backup, Object copy, automated tape
HP D2D systems – with Dynamic deduplication as standard and products specifically
designed for the ROBO environment
HP VLS systems with Accelerated deduplication specifically designed for the high
performance and high capacity requirements of the enterprise
Low bandwidth replication support on D2D & VLS with large fan-in ratio support – changing
the dynamics and costs of “off-site” data protection
HP Physical Tape Systems (MSL, EML, ESL) for the ultimate safe repository of data.
Single point of control from the main data centre using HP data protector management and
Using the wide range of components above allows flexibility and scalability in the variety of ROBO
and data centre backup solutions that can be constructed. With innovative technologies such as
synthetic full functionality, deduplication and low bandwidth replication on VTL products HP is able to
deliver the optimum solution, with optimum performance at the best cost for each specific location,
whilst ensuring central management and control.