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HP 3PAR StoreServ 7000 Storage: Bringing Tier-1 innovation to the midrange market


Aravindan Gopalakrishnan.jpgBy Aravindan Gopalakrishnan, HP 3PAR Product Manager


HP 3PAR StoreServ 7000 Storage has certainly shaken things up in the midrange SAN storage market over the past year. The impressive market share gains and recent spate of industry awards are testimony to that. (In a recent blog post, HPStorageGuy describes how 3PAR StoreServ is selling like hotcakes.) Our customers are taking advantage of the Tier-1 data services available in the 7000, including two unique innovations that set 3PAR StoreServ 7000 apart from any other midrange arrays in the market today:

  • Persistent technologies that power 3PAR StoreServ 7000 in delivering high availability Tier-1 resiliency with Persistent Cache, Persistent Ports and Peer Persistence
  • HP 3PAR Priority Optimization software that enables service levels for applications or tenants with a flexible priority policy

PP1.jpgPersistent Cache: Enabling enterprise scalability 

Unlike many competitive midrange arrays that can only scale to two controller nodes, HP 3PAR StoreServ 7400 can scale from two to four controller nodes. As soon as the 3PAR Operating System detects four controller nodes are installed, the Persistent Cache resilience feature is automatically enabled. Persistent Cache ensures that no storage controller node goes into the performance limiting “cache write through” mode, as any node that loses its adjacent node will dynamically form a mirrored cache relationship with its partner controller node. Ultimately, persistent cache helps preserve service levels through the failure or maintenance of a controller node. This means that the performance of your applications is not impacted should there ever be a situation where a controller node goes offline.


PP2.jpgPersistent Ports: enabling failsafe upgrades (and more)

In situations such as storage system firmware upgrades, controller node failures or lost connectivity to the SAN fabric due to a fabric hardware failure, users tend to rely on host based multi-pathing software to maintain connectivity. The dependency on the multi-path software is seen as introducing added risk and should therefore be avoided. HP 3PAR Persistent Ports increases system resiliency while reducing dependency on host based multi-pathing software by enabling seamless failover of an affected port on a controller node to its partner port on another node. With HP 3PAR Persistent Ports, each host facing port (FC, FCoE and iSCSI) on an HP 3PAR StoreServ 7000 node has both a “Native” and a “Guest” identity associated with it.

The “Guest” identity on a node corresponds to a “Native” port on the partner 3PAR StoreServ node in a node pair. HP 3PAR Persistent Ports transparently configure the network to redirect I/O requests from the “Native” port on one node to the “Guest” port on another node in response to firmware upgrades or node failure. With the recent enhancement to include laser loss events, 3PAR Persistent Ports will ensure that host IO is uninterrupted even when a cable connecting the 3PAR StoreServ 7000 to the SAN fabric is physically pulled out from the device.



PP3.jpgPeer Persistence: Enabling data availability and data protection

3PAR StoreServ Peer Persistence software allows 3PAR StoreServ systems located in different data centers at metropolitan distances to act as peers to each other, presenting continuous storage system access to hosts and servers connected to them. This capability allows you to configure a high-availability solution between two sites or data centers where storage access failover and failback remains completely transparent to the hosts and applications running on those hosts. Peer Persistence software allows hosts to remain online serving their business applications even when they switch storage access from their original site to the storage array on the disaster recovery (DR) site. This results in a much improved recovery time. Peer Persistence also permits active use of the secondary site for more than just DR. You can move applications and storage to secondary data center for maintenance and/or load balancing—without any disruption to your applications, making efficient use of the secondary site, beyond just DR availability.


Priority Optimization: Enabling Quality of Service (QoS) for your most mission-critical

With ever-increasing application consolidation and virtual machine densities, it is not uncommon to see hundreds of physical or virtual servers running one or more workloads connected to a single storage system. A major consequence of this consolidation is contention for shared resources from possibly dissimilar workloads. This is where the capability to maintain predictable service levels in these multi-tenant configurations becomes critical.


PP4.jpgHP 3PAR Priority Optimization enables you to take full control of performance by specifying minimum and maximum limits (“min goal” and “max limit”) for IOPS, bandwidth and latency, as a priority for every QoS object along with the ability to define “latency goals” for the most important applications. If these goals are not met, 3PAR StoreServ automatically adjusts the service levels of lower-priority applications and workloads in order to make sure that necessary QoS levels for your highest priority applications are maintained.


(In the recent blog post The cloud revolution marches on – with HP 3PAR StoreServ and OpenStack, my colleague Ivan Iannaccone talks about enhanced Priority Optimization features in the OpenStack context.)


We hear how you have loved the high performance and ease of use 3PAR StoreServ 7000 has brought to the midrange storage market. Combine this with innovations such as the persistent technologies and HP 3PAR Priority Optimization software that we talked about here and you can see how the 3PAR StoreServ 7000 truly delivers on its promise of Tier-1 storage at midrange prices.


 Keeping the 3PAR StoreServ conversation going



HP Discover is just around the corner. I thought you would be interested to know that we have a webcast on June 10 from Discover Las Vegas where a group of customers are coming together in a panel discussion.You can register by clicking here. Have a great weekend! 





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Any bets on how long it takes HP to rename Peer Persistence to Persistent Peers? Maybe during Discover we should get a pool going or something.........


@Nate - LOL!  Kind of hard not to notice how Peer Persistence stands out from the other Persistent Thingamagigs but Persistent Peers doesn't cut it for me!  See you at Discover.

Dear Mr Gopalakrishnan,


Firstly I would like to congratulate you for your very insightful article.


I have a question regarding the use of FC, FCoE and iSCSI in Peer Persistence, as you already mention them in Persistent Ports.


Many thanks in advance,


Kind Regards,




@Paco - what is your question? I'd also recommend our HP Storage LinkedIn Group where there are lots of people that can help answer questions.

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