Category: Networked Storage

A Storage Debate Q&A: Hyperconverged vs. Disaggregated vs. Centralized

John Kim
The SNIA Networking Storage Forum recently hosted another webcast in our Great Storage Debate webcast series. This time, our SNIA experts debated three competing visions about how storage should be done: Hyperconverged Infrastructure (HCI), Disaggregated Storage, and Centralized Storage. If you missed the live event, it’s available on-demand. Questions from the webcast attendees made the panel debate quite lively. As promised, here are answers to those questions. Q. Can you imagine a realistic scenario where the different storage types are used as storage tiers? How much are they interoperable? Read More

Storage Technologies & Practices Ripe for Refresh – Part 2

Alex McDonald
So much of what we discuss in SNIA is the latest emerging technologies in storage. While it’s good to know all about the latest and greatest technologies, it’s also important to understand those technologies being sunsetted. In this SNIA Networking Storage Forum (NSF) webcast series “Storage Technologies & Practices Ripe for Refresh” we cover technologies that are at (or close to) being past their useful life. On June 22, 2021, we’ll host the second installment of this series, Storage Technologies & Practices Ripe for Refresh – Part 2 where we’ll discuss obsolete hardware, protocols, interfaces and other aspects of storage. We’ll offer advice on how to replace these older technologies in production environments as well as why these changes are recommended. We’ll also cover protocols that you should consider removing from your networks, either older versions of protocols where only newer versions should be used, or protocols that have been supplanted by superior options and should be discontinued entirely. Finally, Read More

Protecting NVMe over Fabrics Data from Day One, The Armored Truck Way

John Kim
With ever increasing threat vectors both inside and outside the data center, a compromised customer dataset can quickly result in a torrent of lost business data, eroded trust, significant penalties, and potential lawsuits. Potential vulnerabilities exist at every point when scaling out NVMe® storage, which requires data to be secured every time it leaves a server or the storage media, not just when leaving the data center. NVMe over Fabrics is poised to be the one of the most dominant storage transports of the future and securing and validating the vast amounts of data that will traverse this fabric is not just prudent, but paramount. Read More

Another Great Storage Debate: Hyperconverged vs. Disaggregated vs. Centralized

David McIntyre
The SNIA Networking Storage Forum’s “Great Storage Debate” webcast series is back! This time, SNIA experts will be discussing the ongoing evolution of the data center, in particular how storage is allocated and managed. There are three competing visions about how storage should be done: Hyperconverged Infrastructure (HCI), Disaggregated Storage, and Centralized Storage. Join us on May 4, 2021 for our live webcast Great Storage Debate: Hyperconverged vs. Disaggregated vs. Centralized. IT architects, storage vendors, and industry analysts argue constantly over which is the best approach and even the exact definition of each. Isn’t Hyperconverged constrained? Is Disaggregated designed only for large cloud service providers? Is Centralized storage only for legacy applications? Read More

Does this Look Outdated to You?

Tom Friend
Last month, the SNIA Networking Storage Forum (NSF) took a different perspective on the storage networking technologies we cover by discussing technologies and practices that you may want to reconsider. The webcast was called “Storage Technologies & Practices Ripe for Refresh.”  I encourage you to watch it on-demand.  It was an interesting session where my colleagues Eric Hibbard, John Kim, and Alex McDonald explored security problems, aging network protocols, and NAS protocols. It was quite popular. In fact, we’re planning more in this series, so stay tuned. The audience asked us some great questions during the live event and as promised, here are our answers: Q. How can I tell if my SSH connections are secure? A. Short of doing a security scan of a server’s SSH port (typically TCP/IP port 22) it can be difficult to know if your connection is secure. In general, the following are recommended: Read More

Beyond NVMe-oF Performance Hero Numbers

Erik Smith
When it comes to selecting the right NVMe over Fabrics™ (NVMe-oF™) solution, one should look beyond test results that demonstrate NVMe-oF’s dramatic reduction in latency and consider the other, more important, questions such as “How does the transport really impact application performance?” and “How does the transport holistically fit into my environment?” To date, the focus has been on specialized fabrics like RDMA (e.g., RoCE) because it provides the lowest possible latency, as well as Fibre Channel because it is generally considered to be the most reliable. However, with the introduction of NVMe-oF/TCP this conversation must be expanded to also include considerations regarding scale, cost, and operations. That’s why the SNIA Networking Storage Forum (NSF) is hosting a webcast series that will dive into answering these questions beyond the standard answer “it depends.” Read More

Is the Sun Setting on Some of Your Technologies?

Tom Friend
So much of what we discuss within SNIA is the latest emerging technologies in storage. While it’s good to know about what technology is coming, it’s also important to understand the technologies that should be sunsetted. It’s the topic of our next SNIA Networking Storage Forum (NSF) webcast on February 3, 2021, “Storage Technologies & Practices Ripe for Refresh.”  In this webcast, you’ll learn about storage technologies and practices in your data center that are ready for refresh or possibly retirement. Find out why some long-standing technologies and practices should be re-evaluated. We’ll discuss: Read More

Data Deduplication FAQ

Alex McDonald
The SNIA Networking Storage Forum (NSF) recently took on the topics surrounding data reduction with a 3-part webcast series that covered Data Reduction Basics, Data Compression and Data Deduplication. If you missed any of them, they are all available on-demand. In Not Again! Data Deduplication for Storage Systems” our SNIA experts discussed how to reduce the number of copies of data that get stored, mirrored, or backed up. Attendees asked some interesting questions during the live event and here are answers to them all. Q. Why do we use the term rehydration for deduplication?  I believe the use of the term rehydration when associated with deduplication is misleading. Rehydration is the activity of bringing something back to its original content/size as in compression. With deduplication the action is more aligned with a scatter/gather I/O profile and this does not require rehydration. Read More

Questions on Securing Data in Transit Answered

Alex McDonald
Data in transit provides a large attack surface for bad actors. Keeping data secure from threats and compromise while it’s being transmitted was the topic at our live SNIA Networking Storage Forum (NSF) webcast, Securing Data in Transit. Our presenters, Claudio DeSanti, Ariel Kit, Cesar Obediente, and Brandon Hoff did an excellent job explaining how to mitigate risks. We had several questions during the live event. Our panel of speakers have been kind enough to answer them here. Q. Could we control the most important point – identity, that is, the permission of every data transportation must have an identity label, so that we can control anomalies and misbehaviors easily? Read More

NVMe Key-Value Standard Q&A

John Kim
Last month, Bill Martin, SNIA Technical Council Co-Chair, presented a detailed update on what’s happening in the development and deployment of the NVMe Key-Value standard. Bill explained where Key Value fits within an architecture, why it’s important, and the standards work that is being done between NVM Express and SNIA. The webcast was one of our highest rated. If you missed it, it’s available on-demand along with the webcast slides. Attendees at the live event had many great questions, which Bill Martin has answered here: Q. Two of the most common KV storage mechanisms in use today are AWS S3 and RocksDB. How does NVMe KV standards align or differ from them? How difficult would it be to map between the APIs and semantics of those other technologies to NVMe KV devices? A. KV Storage is intended as a storage layer that would support these and other object storage mechanisms. There is a publicly available KVRocks: RocksDB compatible key value store and MyRocks compatible storage engine designed for KV SSDs at GitHub. There is also a Ceph Object storage design available. These are example implementations that can help an implementer get to an efficient use of NVMe KV storage. Q. At which layer will my app stack need to change to take advantage of KV storage?  Will VMware or Linux or Windows need to change at the driver level?  Or do the apps need to be changed to treat data differently?  If the apps don’t need to change doesn’t this then just take the data layout tables and move them up the stack in to the server? Read More