|By Jered Floyd||
|June 28, 2014 03:00 PM EDT||
Implementing high performance in enterprise storage is a constant battle to find and eliminate the next system bottleneck. Normally this alternates between limits of the underlying media and the computational overhead of metadata management, but choosing the wrong approach to deduplication can introduce a third performance challenge that can be impossible to overcome. Storage that implements a multi-pass approach to data optimization, such as staged or post-process deduplication, becomes inherently at a disadvantage for both computational and media overhead.
Common Performance Bottlenecks
In a typical enterprise storage system the bottleneck to performance is in one of two places: media bandwidth or computational overhead.
For the storage system designer, media overhead is the simplest to address - add more or faster media. In a hard disk-based storage system, this means adding faster drives, more drives, and larger drive sets. In a flash storage system bandwidth is increased by using SLC flash, adding more independent modules, allocating more over-provisioned space, and improving the flash translation layer.
Reducing computational overhead is a greater challenge. Once you have enough media bandwidth the problem becomes shuffling data to and from the storage initiators. Identifying the bottlenecks to performance here can be devilishly complex, as the designer must be concerned about matters such as system memory bandwidth, number of data copies and, especially in today's multi-core world, synchronization between multiple requests. There's no silver bullet here, so the only solution is having a very talented team of software engineers designing and optimizing the storage platform.
Adding deduplication introduces complexity directly into this most challenging area for performance improvement. Any deduplication implementation must interact directly with the storage metadata that is so critical to performance, since I/O requests are being redirected or eliminated based on the system's knowledge of duplicate data. Unless the deduplication technology has been designed and implemented in an inline, multi-core scalable, and low memory overhead way, system architects often try to separate deduplication into a separate layer and a second pass through the data. This is a mistake that harms storage performance in a way that cannot be repaired.
The Impossible Challenge of Multi-Pass Deduplication
This second pass through the data commonly occurs in two possible places: on the final storage media or when transferring data from a staging area to the final storage media.
The first case is always called post-process deduplication. Data are written to their resting media location and a separate process later reads them back, as time and bandwidth allow, determining if any portions are duplicates. If there are duplicates then storage metadata is updated to note this and space is freed for reuse. I've written extensively in the past about the risks of post-process deduplication; since it always requires additional media bandwidth and computational overhead it severely harms performance, and since there are no guarantees about when deduplication will occur it does not meet the requirements for high-change-rate use cases such as VDI.
The second case, where data is deduplicated as it is being moved from a staging location to a final media location, is often erroneously called inline - as it is inline with that destaging process - but is really just a modified form of post-process deduplication. As with conventional post-process deduplication, another round of data read and processing must occur. Additionally, now both the staging media and final media must provide the full system level of performance or either can become the bottleneck.
For example, some flash storage systems stage all data to a small arena of SLC flash prior to deduplication. This design doubles the number of possible performance bottlenecks in the architecture: performance writing to the staging area, front-end data ingestion, final media storage performance, and the deduplication and de-staging process itself. This sort of multi-pass deduplication process retains all of the negative performance aspects of a traditional post-process implementation.
Staged Post-process Deduplication
High Performance Requires Inline Deduplication
Any form of multi-pass deduplication introduces new bottlenecks that prevent an enterprise storage system from delivering the highest levels of performance. Post-process deduplication, whether on the final media or during a destaging process, creates additional overhead in both media access and data processing. For flash storage platforms requiring the highest levels of performance, only tightly integrated inline deduplication can meet all system requirements.
All clouds are not equal. To succeed in a DevOps context, organizations should plan to develop/deploy apps across a choice of on-premise and public clouds simultaneously depending on the business needs. This is where the concept of the Lean Cloud comes in - resting on the idea that you often need to relocate your app modules over their life cycles for both innovation and operational efficiency in the cloud. In his session at @DevOpsSummit at19th Cloud Expo, Valentin (Val) Bercovici, CTO of Soli...
Dec. 2, 2016 02:15 PM EST Reads: 1,494
Without a clear strategy for cost control and an architecture designed with cloud services in mind, costs and operational performance can quickly get out of control. To avoid multiple architectural redesigns requires extensive thought and planning. Boundary (now part of BMC) launched a new public-facing multi-tenant high resolution monitoring service on Amazon AWS two years ago, facing challenges and learning best practices in the early days of the new service. In his session at 19th Cloud Exp...
Dec. 2, 2016 02:02 PM EST Reads: 142
Predictive analytics tools monitor, report, and troubleshoot in order to make proactive decisions about the health, performance, and utilization of storage. Most enterprises combine cloud and on-premise storage, resulting in blended environments of physical, virtual, cloud, and other platforms, which justifies more sophisticated storage analytics. In his session at 18th Cloud Expo, Peter McCallum, Vice President of Datacenter Solutions at FalconStor, discussed using predictive analytics to mon...
Dec. 2, 2016 02:00 PM EST Reads: 4,801
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor – all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
Dec. 2, 2016 01:30 PM EST Reads: 5,684
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place June 6-8, 2017, at the Javits Center in New York City, New York, is co-located with 20th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry p...
Dec. 2, 2016 01:30 PM EST Reads: 1,802
20th Cloud Expo, taking place June 6-8, 2017, at the Javits Center in New York City, NY, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy.
Dec. 2, 2016 01:15 PM EST Reads: 2,068
Join Impiger for their featured webinar: ‘Cloud Computing: A Roadmap to Modern Software Delivery’ on November 10, 2016, at 12:00 pm CST. Very few companies have not experienced some impact to their IT delivery due to the evolution of cloud computing. This webinar is not about deciding whether you should entertain moving some or all of your IT to the cloud, but rather, a detailed look under the hood to help IT professionals understand how cloud adoption has evolved and what trends will impact th...
Dec. 2, 2016 01:00 PM EST Reads: 2,440
Traditional on-premises data centers have long been the domain of modern data platforms like Apache Hadoop, meaning companies who build their business on public cloud were challenged to run Big Data processing and analytics at scale. But recent advancements in Hadoop performance, security, and most importantly cloud-native integrations, are giving organizations the ability to truly gain value from all their data. In his session at 19th Cloud Expo, David Tishgart, Director of Product Marketing ...
Dec. 2, 2016 01:00 PM EST Reads: 1,381
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smar...
Dec. 2, 2016 12:11 PM EST Reads: 205
Internet of @ThingsExpo, taking place June 6-8, 2017 at the Javits Center in New York City, New York, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @ThingsExpo New York Call for Papers is now open.
Dec. 2, 2016 12:00 PM EST Reads: 1,824
"ReadyTalk is an audio and web video conferencing provider. We've really come to embrace WebRTC as the platform for our future of technology," explained Dan Cunningham, CTO of ReadyTalk, in this SYS-CON.tv interview at WebRTC Summit at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 2, 2016 12:00 PM EST Reads: 163
Everyone knows that truly innovative companies learn as they go along, pushing boundaries in response to market changes and demands. What's more of a mystery is how to balance innovation on a fresh platform built from scratch with the legacy tech stack, product suite and customers that continue to serve as the business' foundation. In his General Session at 19th Cloud Expo, Michael Chambliss, Head of Engineering at ReadyTalk, discussed why and how ReadyTalk diverted from healthy revenue and mor...
Dec. 2, 2016 11:45 AM EST Reads: 1,454
In an era of historic innovation fueled by unprecedented access to data and technology, the low cost and risk of entering new markets has leveled the playing field for business. Today, any ambitious innovator can easily introduce a new application or product that can reinvent business models and transform the client experience. In their Day 2 Keynote at 19th Cloud Expo, Mercer Rowe, IBM Vice President of Strategic Alliances, and Raejeanne Skillern, Intel Vice President of Data Center Group and G...
Dec. 2, 2016 11:30 AM EST Reads: 1,845
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busin...
Dec. 2, 2016 11:30 AM EST Reads: 3,739
Extracting business value from Internet of Things (IoT) data doesn’t happen overnight. There are several requirements that must be satisfied, including IoT device enablement, data analysis, real-time detection of complex events and automated orchestration of actions. Unfortunately, too many companies fall short in achieving their business goals by implementing incomplete solutions or not focusing on tangible use cases. In his general session at @ThingsExpo, Dave McCarthy, Director of Products...
Dec. 2, 2016 11:00 AM EST Reads: 399
"Qosmos has launched L7Viewer, a network traffic analysis tool, so it analyzes all the traffic between the virtual machine and the data center and the virtual machine and the external world," stated Sebastien Synold, Product Line Manager at Qosmos, in this SYS-CON.tv interview at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 2, 2016 11:00 AM EST Reads: 398
You have great SaaS business app ideas. You want to turn your idea quickly into a functional and engaging proof of concept. You need to be able to modify it to meet customers' needs, and you need to deliver a complete and secure SaaS application. How could you achieve all the above and yet avoid unforeseen IT requirements that add unnecessary cost and complexity? You also want your app to be responsive in any device at any time. In his session at 19th Cloud Expo, Mark Allen, General Manager of...
Dec. 2, 2016 10:45 AM EST Reads: 1,593
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
Dec. 2, 2016 10:30 AM EST Reads: 1,899
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal ...
Dec. 2, 2016 10:15 AM EST Reads: 2,026
Regulatory requirements exist to promote the controlled sharing of information, while protecting the privacy and/or security of the information. Regulations for each type of information have their own set of rules, policies, and guidelines. Cloud Service Providers (CSP) are faced with increasing demand for services at decreasing prices. Demonstrating and maintaining compliance with regulations is a nontrivial task and doing so against numerous sets of regulatory requirements can be daunting task...
Dec. 2, 2016 10:00 AM EST Reads: 610