Great Article, Thanks Paul Feresten, Sr. Product Marketing Manager, and Rajesh Sundaram, Technical DirectorAutomated Storage Tiering And The Net App Virtual Storage Tier
Benchmarking a Scalable and Highly Available Architecture for Virtual DesktopsDataCore Software
This paper reports on a configuration for Virtual Desktops (VDs) which reduces the total hardware cost to approximately $32.41 per desktop, including the storage infrastructure. This number is achieved using a configuration with dual node, cross-mirrored, High Availability storage. In comparison to previously published reports, which tout the storage infrastructure costs alone of VDI at from fifty to several hundred dollars per virtual machine, the significance of the data becomes self evident. In this report, storage hardware costs become inconsequential.
The science of automated storage tiering distills down to monitoring I/O behavior, determining frequency of use, then dynamically moving blocks of information to the most suitable class or tier of storage device. DataCore™ SANsymphony™-V software automatically manages your blocks to best allocate your storage.
Power consumption in computing gets more and more attention.
How can we reduce it, save money on variable business cost and be \'Green\'?
This white paper will shed some new light on the matter.
This is a paper was written by David Reine, an IT analyst for The Clipper Group, and highlights IBM’s SAN Volume Controller new features, capabilities and benefits. These new capabilities were announced on October 20, 2009 If you have a heterogeneous storage architecture in your data center that is under-utilized and costing the enterprise on the bottom line, IBM SVC 5 may be the solution that you have
Benchmarking a Scalable and Highly Available Architecture for Virtual DesktopsDataCore Software
This paper reports on a configuration for Virtual Desktops (VDs) which reduces the total hardware cost to approximately $32.41 per desktop, including the storage infrastructure. This number is achieved using a configuration with dual node, cross-mirrored, High Availability storage. In comparison to previously published reports, which tout the storage infrastructure costs alone of VDI at from fifty to several hundred dollars per virtual machine, the significance of the data becomes self evident. In this report, storage hardware costs become inconsequential.
The science of automated storage tiering distills down to monitoring I/O behavior, determining frequency of use, then dynamically moving blocks of information to the most suitable class or tier of storage device. DataCore™ SANsymphony™-V software automatically manages your blocks to best allocate your storage.
Power consumption in computing gets more and more attention.
How can we reduce it, save money on variable business cost and be \'Green\'?
This white paper will shed some new light on the matter.
This is a paper was written by David Reine, an IT analyst for The Clipper Group, and highlights IBM’s SAN Volume Controller new features, capabilities and benefits. These new capabilities were announced on October 20, 2009 If you have a heterogeneous storage architecture in your data center that is under-utilized and costing the enterprise on the bottom line, IBM SVC 5 may be the solution that you have
Lucene in the Cloud: Learn how GCE leveraged the power of search and Big Data...lucenerevolution
Presented by Seshu Simhadri | Global Computer Enterprises. See conference video - http://www.lucidimagination.com/devzone/events/conferences/lucene-revolution-2012
A leader in bringing innovative technologies to the Federal Government, GCE looks to open source tools to drive down cost and provide the foundation for building value-added services for its customers. This talk will discus GCE’s innovative use of Lucene/Solr combined with the GCE Big Data Cloud to open up access to Federal spending data. This data is in wide use across the Federal government, Federal contracting community, media and press, as well as Capitol Hill. GCE has utilized this toolset to deliver the type of capability that users typically only find in web consumer applications. This session will highlight the technical side of the challenge in implementing these tools across a large user community and data set in a Cloud environment.
How an Enterprise Data Fabric (EDF) can improve resiliency and performancegojkoadzic
From the Gaming Scalability event, June 2009 in London (http://gamingscalability.org).
Mike Stolz outlines three relevant use cases for the GemFire Data Caching Technologies that clearly demonstrate a reduction in the Total Cost of Ownership, increased reliability, increased scalability, increased throughput and a reduction in overall system latency. The use cases include
* HA, DR and BCP is a pure caching play
* How EDF can improve your Affiliate Banner Advertising capability
* Advantages of global data consistency and regional edge caching
Re-inventing the Database: What to Keep and What to Throw AwayDATAVERSITY
NoSQL has turned many database concepts upside down. Consistency models, transactions, data models, and query interfaces are being reinvented. Tradeoffs between performance, availability, managability, and usability are being re-thought. In this talk 10gen President Max Schireson, reviews some of the different approaches being taken and offers opinions on the right choices for different uses.
Whether distributed through multichannel networks, webcasting, over-the-air, or in theaters, video requires specialized storage at each stage of the production process. Learn more in this four-page paper.
With Dell PCIe Express Flash SSDs, you can get powerful performance for your databases from using internal storage. In our tests, the Dell PowerEdge R820 with four Dell PCIe Express Flash SSDs was able to support a maximum of 2,592 TPS, equal to that of a database cached in memory, which performed 2,555 TPS with the same system load.
For critical database applications, the Dell PowerEdge R820 with Dell PCIe Express Flash SSDs can provide you the performance you need without the hassles of external storage with a large number of disks.
Deluxe Australia is a leading provider of services and technologies to the worldwide entertainment industry including top Hollywood studios. For nearly a century, Deluxe has provided content owners and creators with the tools and talent they need to bring the most compelling and exciting stories to life. Deluxe specializes in production,
post-production, distribution, and asset management.
Big Data SSD Architecture: Digging Deep to Discover Where SSD Performance Pay...Samsung Business USA
Which storage technology, HDDs or SSDs, excels in big data architecture? SSDs clearly win on speed, offering higher sequential read/write speeds and higher IOPS. However, deploying SSDs in hundreds or thousands of nodes could add up to a very expensive proposition. A better approach identifies critical locations where SSDs enable immediate cost-per-performance wins. This whitepaper will look at the basics of big data tools, review two performance wins with SSDs in a well-known framework, as well as present some examples of emerging opportunities on the leading edge of big data technology.
Dedupe-Centric Storage for General Applications EMC
Proliferation and preservation of many versions and copies of data drives much of the tremendous data growth most companies are experiencing. IT administrators are left to deal with the consequences. Because deduplication addresses one of the key elements of data growth, it should be at the heart of any data management strategy. This paper demonstrates how storage systems can be built with a deduplication engine powerful enough to become a platform that general applications can leverage.
Some vignettes and advice based on prior experience with Cassandra clusters in live environments. Includes some material from other operational slides.
With the football season in full swing, the baseball season heading into the playoffs, and the hockey season just starting, it is time to raid the refrigerator for snacks, head for the most comfortable chair in the family room, and settle in for a full day of viewing sports. Unfortunately, it is not always easy to turn on the myriad number of devices required to watch a game broadcast over cable, on that wide-screen hi-def TV, with the wrap-around sound from the latest audio system available. There is the re-mote for the cable system; there is a remote for the TV; there is one for the satellite dish; there is anoth-er for the sound system. There are so many remote controls on the coffee table that there is hardly room for the snacks! What you need is a universal remote; a single, simplified command center that can control all of the hi-tech equipment in the family room. Unfortunately, even that universal remote will not do the job for any device released after the remote was manufactured. What is required is a universal remote with a learning capability to take the complexity out of turning on the TV, one than can reprogram itself from the remote that comes with every new device.
Lucene in the Cloud: Learn how GCE leveraged the power of search and Big Data...lucenerevolution
Presented by Seshu Simhadri | Global Computer Enterprises. See conference video - http://www.lucidimagination.com/devzone/events/conferences/lucene-revolution-2012
A leader in bringing innovative technologies to the Federal Government, GCE looks to open source tools to drive down cost and provide the foundation for building value-added services for its customers. This talk will discus GCE’s innovative use of Lucene/Solr combined with the GCE Big Data Cloud to open up access to Federal spending data. This data is in wide use across the Federal government, Federal contracting community, media and press, as well as Capitol Hill. GCE has utilized this toolset to deliver the type of capability that users typically only find in web consumer applications. This session will highlight the technical side of the challenge in implementing these tools across a large user community and data set in a Cloud environment.
How an Enterprise Data Fabric (EDF) can improve resiliency and performancegojkoadzic
From the Gaming Scalability event, June 2009 in London (http://gamingscalability.org).
Mike Stolz outlines three relevant use cases for the GemFire Data Caching Technologies that clearly demonstrate a reduction in the Total Cost of Ownership, increased reliability, increased scalability, increased throughput and a reduction in overall system latency. The use cases include
* HA, DR and BCP is a pure caching play
* How EDF can improve your Affiliate Banner Advertising capability
* Advantages of global data consistency and regional edge caching
Re-inventing the Database: What to Keep and What to Throw AwayDATAVERSITY
NoSQL has turned many database concepts upside down. Consistency models, transactions, data models, and query interfaces are being reinvented. Tradeoffs between performance, availability, managability, and usability are being re-thought. In this talk 10gen President Max Schireson, reviews some of the different approaches being taken and offers opinions on the right choices for different uses.
Whether distributed through multichannel networks, webcasting, over-the-air, or in theaters, video requires specialized storage at each stage of the production process. Learn more in this four-page paper.
With Dell PCIe Express Flash SSDs, you can get powerful performance for your databases from using internal storage. In our tests, the Dell PowerEdge R820 with four Dell PCIe Express Flash SSDs was able to support a maximum of 2,592 TPS, equal to that of a database cached in memory, which performed 2,555 TPS with the same system load.
For critical database applications, the Dell PowerEdge R820 with Dell PCIe Express Flash SSDs can provide you the performance you need without the hassles of external storage with a large number of disks.
Deluxe Australia is a leading provider of services and technologies to the worldwide entertainment industry including top Hollywood studios. For nearly a century, Deluxe has provided content owners and creators with the tools and talent they need to bring the most compelling and exciting stories to life. Deluxe specializes in production,
post-production, distribution, and asset management.
Big Data SSD Architecture: Digging Deep to Discover Where SSD Performance Pay...Samsung Business USA
Which storage technology, HDDs or SSDs, excels in big data architecture? SSDs clearly win on speed, offering higher sequential read/write speeds and higher IOPS. However, deploying SSDs in hundreds or thousands of nodes could add up to a very expensive proposition. A better approach identifies critical locations where SSDs enable immediate cost-per-performance wins. This whitepaper will look at the basics of big data tools, review two performance wins with SSDs in a well-known framework, as well as present some examples of emerging opportunities on the leading edge of big data technology.
Dedupe-Centric Storage for General Applications EMC
Proliferation and preservation of many versions and copies of data drives much of the tremendous data growth most companies are experiencing. IT administrators are left to deal with the consequences. Because deduplication addresses one of the key elements of data growth, it should be at the heart of any data management strategy. This paper demonstrates how storage systems can be built with a deduplication engine powerful enough to become a platform that general applications can leverage.
Equip your Dell EMC PowerEdge R740xd servers with Intel Optane persistent mem...
Similar to Great Article, Thanks Paul Feresten, Sr. Product Marketing Manager, and Rajesh Sundaram, Technical DirectorAutomated Storage Tiering And The Net App Virtual Storage Tier
Some vignettes and advice based on prior experience with Cassandra clusters in live environments. Includes some material from other operational slides.
With the football season in full swing, the baseball season heading into the playoffs, and the hockey season just starting, it is time to raid the refrigerator for snacks, head for the most comfortable chair in the family room, and settle in for a full day of viewing sports. Unfortunately, it is not always easy to turn on the myriad number of devices required to watch a game broadcast over cable, on that wide-screen hi-def TV, with the wrap-around sound from the latest audio system available. There is the re-mote for the cable system; there is a remote for the TV; there is one for the satellite dish; there is anoth-er for the sound system. There are so many remote controls on the coffee table that there is hardly room for the snacks! What you need is a universal remote; a single, simplified command center that can control all of the hi-tech equipment in the family room. Unfortunately, even that universal remote will not do the job for any device released after the remote was manufactured. What is required is a universal remote with a learning capability to take the complexity out of turning on the TV, one than can reprogram itself from the remote that comes with every new device.
XPDS13: VIRTUAL DISK INTEGRITY IN REAL TIME JP BLAKE, ASSURED INFORMATION SE...The Linux Foundation
This paper introduces the Virtual Disk Integrity in Real Time (vDIRT) monitor, a mechanism to measure virtual hard disks in real time from the Dom0 trusted computing base. vDIRT is an improvement over traditional methods for auditing file integrity which rely on a service in a potentially compromised host. It also overcomes the limitations of existing methods for assuring disk integrity that are coarse grained and do not scale to large disks. vDIRT is a capability to measure disk reads and writes in real time, allowing for fine grained tracking of sectors within files, as well as the overall disk. The vDIRT implementation and its impact on performance is discussed to show that disk operation monitoring from Dom0 is practical.
Measuring Nexsan Performance and Compatibility in Virtualized Environments, Medición de desempeño y compatibilidad de de Nexsan en ambietes virtualizados.
Benchmarking Performance: Benefits of PCIe NVMe SSDs for Client WorkloadsSamsung Business USA
The transition from Serial ATA (SATA ) to Peripheral Component Interconnect Express (PCIe) interface and Non-Volatile Memory Express (NVMe) protocol is taking client storage to a new level. This white paper discusses the benefits that PCIe NVMe SSDs, such as Samsung’s 950 PRO, bring to client PC users. Client PC workloads are not always well understood in the industry, since common benchmarking utilities tend to focus on measuring maximum performance rather than performance under typical PC usage. This white paper looks at actual IO traces of PC workloads to better understand how client SSDs should be benchmarked, and also tests the 950 PRO against other Samsung SSDs to show how PCIe and NVMe improve IO performance in tests that represent real-world IO activity.
Demartek evaluated the Lenovo S3200 SAN supporting multiple workloads and saw tremendous results. Read this report and find out why the S3200 should be considered for your SAN deployments!
Manage rising disk prices with storage virtualization webinarHitachi Vantara
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The United States National Institute of Standards and Technology (NIST) has p...Michael Hudak
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Ar Accelerating Converged Infrastructure With FlexpodMichael Hudak
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This is a New list that CRN publishes that is similar to the VAR500 and Fast Growth 100. The following vendor certifications are part of the CRN Tech Elite: Emc, IBM,Cisco,VMware, Citrix, Dell, Symantec and NetApp
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What does Syncsort add?
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Stay ahead of the curve with our premium MEAN Stack Development Solutions. Our expert developers utilize MongoDB, Express.js, AngularJS, and Node.js to create modern and responsive web applications. Trust us for cutting-edge solutions that drive your business growth and success.
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LA HUG - Video Testimonials with Chynna Morgan - June 2024Lital Barkan
Have you ever heard that user-generated content or video testimonials can take your brand to the next level? We will explore how you can effectively use video testimonials to leverage and boost your sales, content strategy, and increase your CRM data.🤯
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Memorandum Of Association Constitution of Company.pptseri bangash
www.seribangash.com
A Memorandum of Association (MOA) is a legal document that outlines the fundamental principles and objectives upon which a company operates. It serves as the company's charter or constitution and defines the scope of its activities. Here's a detailed note on the MOA:
Contents of Memorandum of Association:
Name Clause: This clause states the name of the company, which should end with words like "Limited" or "Ltd." for a public limited company and "Private Limited" or "Pvt. Ltd." for a private limited company.
https://seribangash.com/article-of-association-is-legal-doc-of-company/
Registered Office Clause: It specifies the location where the company's registered office is situated. This office is where all official communications and notices are sent.
Objective Clause: This clause delineates the main objectives for which the company is formed. It's important to define these objectives clearly, as the company cannot undertake activities beyond those mentioned in this clause.
www.seribangash.com
Liability Clause: It outlines the extent of liability of the company's members. In the case of companies limited by shares, the liability of members is limited to the amount unpaid on their shares. For companies limited by guarantee, members' liability is limited to the amount they undertake to contribute if the company is wound up.
https://seribangash.com/promotors-is-person-conceived-formation-company/
Capital Clause: This clause specifies the authorized capital of the company, i.e., the maximum amount of share capital the company is authorized to issue. It also mentions the division of this capital into shares and their respective nominal value.
Association Clause: It simply states that the subscribers wish to form a company and agree to become members of it, in accordance with the terms of the MOA.
Importance of Memorandum of Association:
Legal Requirement: The MOA is a legal requirement for the formation of a company. It must be filed with the Registrar of Companies during the incorporation process.
Constitutional Document: It serves as the company's constitutional document, defining its scope, powers, and limitations.
Protection of Members: It protects the interests of the company's members by clearly defining the objectives and limiting their liability.
External Communication: It provides clarity to external parties, such as investors, creditors, and regulatory authorities, regarding the company's objectives and powers.
https://seribangash.com/difference-public-and-private-company-law/
Binding Authority: The company and its members are bound by the provisions of the MOA. Any action taken beyond its scope may be considered ultra vires (beyond the powers) of the company and therefore void.
Amendment of MOA:
While the MOA lays down the company's fundamental principles, it is not entirely immutable. It can be amended, but only under specific circumstances and in compliance with legal procedures. Amendments typically require shareholder
"𝑩𝑬𝑮𝑼𝑵 𝑾𝑰𝑻𝑯 𝑻𝑱 𝑰𝑺 𝑯𝑨𝑳𝑭 𝑫𝑶𝑵𝑬"
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𝐓𝐉 𝐂𝐨𝐦𝐬 provides unlimited package services including such as Event organizing, Event planning, Event production, Manpower, PR marketing, Design 2D/3D, VIP protocols, Interpreter agency, etc.
Sports events - Golf competitions/billiards competitions/company sports events: dynamic and challenging
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Editable Toolkit to help you reuse our content: 700 Powerpoint slides | 35 Excel sheets | 84 minutes of Video training
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Tata Group Dials Taiwan for Its Chipmaking Ambition in Gujarat’s DholeraAvirahi City Dholera
The Tata Group, a titan of Indian industry, is making waves with its advanced talks with Taiwanese chipmakers Powerchip Semiconductor Manufacturing Corporation (PSMC) and UMC Group. The goal? Establishing a cutting-edge semiconductor fabrication unit (fab) in Dholera, Gujarat. This isn’t just any project; it’s a potential game changer for India’s chipmaking aspirations and a boon for investors seeking promising residential projects in dholera sir.
Visit : https://www.avirahi.com/blog/tata-group-dials-taiwan-for-its-chipmaking-ambition-in-gujarats-dholera/
Tata Group Dials Taiwan for Its Chipmaking Ambition in Gujarat’s Dholera
Great Article, Thanks Paul Feresten, Sr. Product Marketing Manager, and Rajesh Sundaram, Technical DirectorAutomated Storage Tiering And The Net App Virtual Storage Tier
1. Automated Storage Tiering and the
NetApp Virtual Storage Tier More on VST
Want to learn more about
By Paul Feresten, Sr. Product Marketing Manager, and Rajesh Sundaram, Technical Director VST? A just-published
Automated storage tiering (AST) technologies are primarily intended to help white paper has all the
data centers benefit from the improved performance of Flash-based media details, including
measured performance in
while minimizing cost and complexity. Flash-based devices such as solid-
a number of
state disk (SSD) controller-based Flash can complete 25 to 100 times more
environments.
random read operations per second than the fastest hard disk drives
(HDDs), but that performance comes at a premium of 15 to 20 times higher More
cost per gigabyte. HDDs continue to improve in capacity, but HDD Virtual Desktops and
performance in terms of IOPS per dollar is relatively stagnant. Flash VST
provides far more IOPS per dollar, plus lower latency.
The NetApp Virtual
Storage Tier has a
tremendous impact on
virtual desktop
environments. A recent
blog post from Vaughn
Stewart describes the
extreme loads that these
environments can create
and explains how VST
can reduce spindle count
and increase the number
of desktops a storage
environment can support
while boosting overall
data throughput.
Figure 1) Comparison of the random read efficiency of different types of solid-state and
rotational media on a logarithmic scale. Note that in terms of IOPS per dollar there is relatively More
little difference between different HDD types.
Rather than permanently placing an entire dataset on expensive media,
automated storage tiering tries to identify and store hot data on higher-
performance storage media while storing cold data on slower, lower-cost
media.
Tech OnTap April 2011 I Page 1
2. NetApp has put a lot of time and energy into understanding the problems
that AST must address in order to architect an optimal solution.
This article describes:
• Criteria for evaluating AST technologies
• Migration-based versus caching-based AST approaches Intelligent Caching
• The NetApp® Virtual Storage Tier—a caching-based approach to Flash Cache can cut your
AST storage costs by reducing
the number of spindles
Evaluating AST Technology needed for a given level
of performance by as
much as 75% and by
From an I/O perspective, the primary goal of AST is to shift as much random
allowing you to replace
I/O as possible to high-performance media (Flash) to minimize the random
high-performance disks
I/O burden on HDDs and reduce average latency. The distinction between with more economical
random I/O and sequential I/O is important, because Flash has a relatively options. Read more about
little price/performance advantage over HDDs for sequential reads and this game-changing
writes (because HDDs are good at sequential I/O). technology.
More
Figure 2) Comparison of the sequential throughput efficiency of different types of solid-state
and rotational media.
There are several factors that affect an AST solution’s ability to achieve the
above goal:
• What’s the granularity of data placement? The smaller the chunk
of data you operate on, the more efficient it is in terms of the system
and HDD resources it uses for placement, and the less chance there
is of cold data “tagging along” with the hot data and consuming
expensive media to no benefit.
Tech OnTap April 2011 I Page 2
3. • How is hot data identified and how quickly is it accelerated? The
more quickly hot data gets into Flash, the less likely that relatively
short-lived spikes in I/O activity will be missed, the less HDD I/O that
will be required, and the greater the improvement in average latency.
From an operational standpoint, there are several additional factors worth
considering:
How difficult is the solution to deploy and manage? An AST solution that
requires major reconfiguration to deploy, or that requires a lot of monitoring
and management, may defeat the purpose.
How does the solution integrate with the other storage technologies you use
(backup, deduplication, thin provisioning, and so on)? You don’t want to
deploy a solution and then find out that your backups don’t work or that they
trigger wholesale data movements.
Migration Versus Caching for AST
There are two fundamentally different approaches to AST: migration and
caching.
Migration-based AST automates the process of data migration. When a
chunk of data is identified as “hot,” that chunk is moved to faster media and
then moved back to slower media when it becomes cold. HDD access is
needed both for movement to Flash and movement out of Flash.
Caching-based AST uses well-understood caching methods to “promote”
hot data to high-performance media. Because a copy of the data remains on
HDD, when data becomes cold it can simply be released from cache with no
additional HDD I/O required.
Figure 3) Caching-based versus migration-based automated storage tiering.
Tech OnTap April 2011 I Page 3
4. The NetApp Virtual Storage Tier
NetApp considered these two approaches to AST in light of the evaluation
criteria we discussed earlier and concluded that a caching-based approach
to AST did the better job of addressing those criteria.
In addition, NetApp was able to focus on optimizing read performance
because the NetApp Write Anywhere File Layout (WAFL®) effectively turns
write activity into sequential writes, which—as Figure 2 illustrates—HDDs
are good at. This is explained in detail in a recent blog post from Mike Riley
and Tech OnTap® contributor John Fullbright. (This is also the reason that
NetApp dual-parity RAID, or RAID-DP®, achieves good write performance
where other RAID 6 implementations do not.)
Figure 4) The NetApp Virtual Storage Tier is an approach to automated storage tiering based
on caching.
The NetApp Virtual Storage Tier promotes hot data to cache while keeping
HDD I/O overhead to a minimum. Any time a read request is received for a
block on a volume or LUN, that block is automatically subject to promotion.
Note that promotion of a data block is not data migration, because the block
remains on HDD when it is copied into the Virtual Storage Tier. Promotion
happens directly from the system buffer cache, so no extra HDD I/O needed.
Tech OnTap April 2011 I Page 4
5. Because data blocks can be immediately promoted after the first read from
disk, no additional disk I/O is needed. By comparison, migration-based AST
implementations typically don’t promote hot data until it has been read from
disk several times or until the next scheduled migration, and then additional
disk I/O is required to accomplish the migration process.
NetApp algorithms distinguish high-value data from low-value data and
retain that data in the Virtual Storage Tier. Metadata, for example, is always
promoted on first read. In contrast, sequential reads are normally not cached
in the Virtual Storage Tier unless specifically enabled because they tend to
crowd out more valuable data, and HDDs do this well, as we’ve seen. You
can change this behavior to meet the requirements of applications with
unique data access behaviors or different service-level requirements.
Virtual Storage Tier Advantages
Real-time promotion of hot data with high granularity. A data block
typically enters the Virtual Storage Tier the first time it is read from disk. The
performance benefit occurs in real time as subsequent reads are satisfied
from the Virtual Storage Tier. Patterns of read behavior are identified and
blocks of data that are likely to be needed are read ahead of time, but the
Virtual Storage Tier never does wholesale movement of data from one tier of
storage to another. This keeps usage of HDD I/O and other system
resources to a minimum. The efficiency of this approach, combined with the
ability to operate at the granularity of a single 4KB block, allows real-time
promotion of hot data.
With migration-based AST, hot data is migrated from one storage tier to
another either as a background task or scheduled during off-peak hours (to
minimize the extra load on the storage system). Because these solutions
typically operate at a level of granularity that is a minimum of 128 times
higher than the Virtual Storage Tier (ranging from 0.5MB up to 1GB or even
an entire volume or LUN), data movement can take considerable time. Such
approaches may miss important spikes of activity when those spikes have a
shorter duration than the time needed to identify and promote hot data.
The 4KB granularity of the Virtual Storage Tier means that it uses Flash-
based media very efficiently. Solutions with coarser granularity are likely to
include a lot of “cold” data along with each hot data block, and are therefore
likely to require a greater amount of expensive Flash media to achieve the
same results.
Easy to deploy and simple to manage. The Virtual Storage Tier works with
existing data volumes and LUNs. It requires no complicated or disruptive
changes to your storage environment. There is no need to set policies,
thresholds, or time windows for data movement. You simply install Flash
technology in your storage systems. Once this is accomplished, the Virtual
Tech OnTap April 2011 I Page 5
6. Storage Tier becomes active for all volumes managed by the storage
controller. You can then exclude user data for lower-priority volumes from
the Virtual Storage Tier if desired.
Other AST solutions require incremental policy, data classification, and
structural changes to existing storage infrastructure such as the creation of
dedicated storage pools and migration of data.
Fully integrated. The Virtual Storage Tier is fully integrated with the NetApp
Unified Storage Architecture, which means that you can use it with any NAS
or SAN storage protocol with no changes.
In addition, migration-based AST solutions may not interoperate with storage
efficiency features such as deduplication. The NetApp Virtual Storage Tier
works in conjunction with all NetApp storage efficiency features, including
thin provisioning, FlexClone® technology, deduplication, and compression,
and this close integration works to your advantage and enhances the
functioning of the Virtual Storage Tier.
For example, when you deduplicate a volume, the benefits of deduplication
persist in the Virtual Storage Tier. A single block in the Virtual Storage Tier
could have many metadata pointers to it, increasing the probability that it will
be read again, and thus increasing the value of promoting that block. With
this cache amplification a single block in the Virtual Storage Tier can serve
as several logical blocks. This can yield significant performance benefits for
server and desktop virtualization environments (such as shortening the
duration of boot storms) while reducing the amount of Flash media needed.
Conclusion
Our caching-based approach to AST gives the NetApp Virtual Storage Tier
significant advantages over migration-based AST. The Virtual Storage Tier is
able to promote data in real time so even short spikes of activity benefit from
acceleration. Our 4KB granularity means that we exclude cold data from
Flash very efficiently, so you need less Flash to achieve a good result. By
comparison, migration-based AST is less granular, has a longer time delay
before data is promoted, requires more HDD I/O, and uses expensive Flash-
based media less efficiently.
In effect, the Virtual Storage Tier uses HDDs as a capacity tier and Flash as
a performance tier. You probably have a variety of disk drive types, such as
FC, SATA, and SAS. Any of these can serve as a capacity tier while the
Virtual Storage Tier provides performance. We believe the combination of a
high-performance tier (based on the Virtual Storage Tier) and a single disk-
drive tier (based on SATA disk) makes the most sense for the majority of
applications going forward.
Tech OnTap April 2011 I Page 6
7. Got opinions about the NetApp Virtual Storage Tier?
Ask questions, exchange ideas, and share your thoughts online in
NetApp Communities.
Paul Feresten
Sr. Product Marketing Manager
NetApp
Paul joined NetApp in 2005, focusing on core NetApp software, including
Data ONTAP®, MultiStore®, FlexClone, and thin provisioning. He has over 30
years of industry experience in product management, sales, marketing, and
executive management roles. Prior to joining NetApp, Paul worked at Data
General, Digital Equipment Corporation, MSI Consulting, and SEPATON.
Rajesh Sundaram
Technical Director
NetApp
Since joining NetApp, in 1997, Rajesh has worked on the WAFL file system,
the Data ONTAP RAID subsystem, and integration of Flash technology into
NetApp storage. He holds an MS in Computer Science from the University of
Arizona.
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