3PAR Tiered Storage Gets Smarter and Easier in One Fell Swoop

http://3par.dciginc.com/2009/12/tiered-storage-gets-smarter-an.html

 

Tiered storage is gaining momentum because of the ease in which storage systems make it possible for organizations to implement it. One way that storage system providers offer this feature is through the automated redistribution of volumes on an appropriate tier of disk according to preset policies. However since tiered storage's introduction, new customer requirements for managing it have emerged that dictate tiered storage software found on storage systems get smarter while at the same time making it easier for users to manage.

Using native storage system software to automate the redistribution of data on the appropriate tier of storage within them started in earnest this past decade. Driven primarily by the difficulty and labor involved with implementing tiered storage at the host level and the economic benefits that organizations can derive from using a mix of FC and SATA disk drives within a storage system, it only made sense for storage systems such as the 3PAR InServ Storage Server to offer tools that automate data mobility across disk tiers.

One method used to implement tiered storage is through the policy based tiering of data. Specific policies are assigned to storage system volumes so that data within that volume is always placed on a specific tier or tiers of disk to meet some combination of application availability and performance requirements. Administrators can then set policies so that these volumes are moved from one tier of disk to another tier in anticipation of current or future applications needs.

Normally, these types of data migrations are either not possible or extremely complex as they involve time consuming and often disruptive data migrations that move the volume from one tier of disk to another and then back again.

However, using a feature such as Dynamic Optimization that is found on 3PAR InServ Storage Servers, administrators can with single command move infrequently accessed data that is stored on SATA disk to higher performing FC disk in anticipation of end of quarter or end of year processing and then move it back to SATA disk once this processing is done. 

They can also use it to non-disruptively accomplish other tasks such as data lifecycle management by changing the volume's underlying RAID levels, subsystem failure protection levels, drive types, and radial placement of data or increasing the stripe width across disks and controller resources, thereby aligning storage costs with the value of the data being served.

It is because of these types of capabilities that Dynamic Optimization has become one of the most popular tools on the 3PAR InServ Storage Server among its customers in the four (4) years since Dynamic Optimization's 2005 release. However during that span of time, many of 3PAR's customers have grown their 3PAR storage implementation which has created new opportunities for tiered storage functionality.

Specifically, as customers added more storage capacity in the form of disk drives to a storage system, they might also want to take advantage of the additional performance benefits that these new disk drives can deliver. The 3PAR array is architected in such a way that as resources are added to the system, the performance of all volumes improves.

To achieve this, the volume needs to span as many disk drives in the storage system as possible - existing and new. While accomplishing this is simply done with Dynamic Optimization, 3PAR saw an opportunity for policy management and multi-volume automation to further accelerate such tasks. 
 
The availability of Policy Advisor for 3PAR's Dynamic Optimization feature provides for policies to be set around volume layout and can launch optimizations for hundreds of volumes with a single command, redistributing the data on each volume across both existing and new disks. Policy Advisor helps organizations in several important ways:

·         Users set policies by storage tier. Policy Advisor allows the user to set thresholds, above which volumes will be targeted for redistribution across newly available resources.  This can be specified for each storage tier within the InServ.

·         It analyzes all of the volumes configured on the array and prioritizes how to proceed. Before Dynamic Optimization redistributes a volume, Policy Advisor analyzes the existing volumes. Once this analysis is complete, it generates a report that identifies which of the existing volumes, based on pre-set policies, would most benefit from a dynamic redistribution of data across the new and existing disk drives and in what order volume redistribution should occur.

·         Automate the optimization or customize when and on what volumes the optimization occurs. Once Policy Advisor completes its analysis, the user can launch in a single command the optimization of all identified volumes which would benefit from redistribution.  Alternatively, organizations can schedule the optimization to occur in any of a number of alternative ways.  For instance, they can schedule it to run during scheduled maintenance windows or to only optimize a subset of volumes that would most benefit from optimization.

Moving tiered storage software from the host servers to external storage systems earlier this decade resulted in the broader adoption of tiered storage software at the storage system level by organizations as a whole.  While data mobility still limits tiered storage deployments on a variety of platforms, for those vendors making it simple to implement, non-disruptive and completely automated, user interest in this technology is growing significantly. 

However data storage technology is a rapidly changing space and what was innovative a few years ago can often benefit from additional breakthroughs in virtualization and automation technology. Tiered storage software is no exception from this basic truth in technology.

The introduction of Policy Advisor from 3PAR for Dynamic Optimization on its InServ Storage Servers represents a significant step forward in the evolution of tiered storage software in the following way: in order for tiered storage software on storage systems to stay relevant in changing or high growth environments like the virtual data center, policy management and multi-volume automation are critical.

Policy Advisor enables 3PAR's Dynamic Optimization software and tier management to move to the next level on its InServ Storage Systems. Tiered storage software gets smarter, it remains easy for organizations to implement and use on an ongoing basis and it gives organizations the flexibility to grow without having to "manage" storage

www.3PAR.com

To MAID or not to MAID? That's the question,..

MAID – Massive Array of Idle Disks, as a technology a great concept, but where to apply this technology? In your primary storage this will probably create more worries than financial advantages. When you look at MAID as an functionality in your Backup to Disk or Archive storage, this can actually be a big money saver. In most cases your Backup to disk will only be active during a backup window or when a restore jobs runs, all other moments these systems are (and should be) idle. So if you’re not using you backup to disk why should you keep the disks spinning.

This is the same when you look at you archive storage, only active when referenced but all other moments the disks can spin down and save you big bucks on power, cooling, etc,..

The big advantage comes when you combine your backup to disk and archive storage on one storage system that does MAID but also can dedupe the data. This way the dedupe works for your backup data but also for any duplicate blocks that are archived to the same storage system.

Now you’re really saving money,.. and maybe even enough to afford a real MAID!!

FAST = Fully Automated Storage Tiering from EMC.

What's up with EMC's FAST anouncement in theory this looks great. Is it?

The idea of moving lest frequent accessed data to slower disks and the small part of data that is being referenced often to faster FC or even SSD drives makes a lot of sense. And all of this online and dynamically. But at what cost? Moving data around like this makes only sense if you by doing so are able to reduce your TCO enough to make an investment in FAST technology worth your while or address performance issues that may otherwise impact your business.

Remember that the prices of FC and especially SSD drives are dropping, so maybe it even makes sense to simply host the small part of your data that requires high performance on a bunch of fast FC or SSD drives and keep the rest on SATA with a large cache in front of it.

I mean how often do you perfomance requirements change during the day??

EMC anounces FAST!

According to EMC this represents a New Era in Storage and Information Management.

Is EMC on the right track or just copying what other storage vendors have been doing for several years now.

3par Workshop

This week at my company we organized a 3par workshop called “Start Thin, Get Thin & Stay Thin”. We were very happy with the presence of the 3par European Sales Manager Joao Silva and super SE Fred Lherault. They dazzled our visitors with the unique features 3par offers such as:

• Thin provisioning
• Thin conversion
• Thin reclamation
• Thin persistence



Because 3par is the only storage vendor in the market offering these features I cannot help but to think that this must take a huge flight and become adopted by other storage vendors rapidly. Almost every other storage vendor has the possibility to Thin Provision LUNS and/or Volumes but no other vendor offers technology to actually stay Thin Provisioned by reclaiming space from deleted volumes. Thin Copy Reclamation does the same for thin copies (virtual copy snapshots and remote copies).



This must be the next big thing in 2010,.. am I right??

The start

This is the start, my very first post. My intentions for this blog are to start discussions about storage, vendors, technologies, data management and so on,..