NAS vs SAN
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NFS and SANs can provide block-level access to storage in almost identical ways from the perspective of applications. At the protocol level, block reads over NFS and iSCSI are almost identical - they both request a number of bytes or blocks starting at a given offset. The main difference is that NFS uses file handles to identify blocks while SANs use LUNs, but a LUN and file are just containers for blocks of data. NetApp's WAFL file system allows it to present LUNs as files within aggregates, unifying SAN, NAS, and iSCSI storage into a single appliance by storing data at the block level regardless of protocol. Dave Hitz was instrumental in revolutionizing storage through his work
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![Different container but same matter!
A LUN and a file are both just containers that hold blocks of data, so get over it. It was this similarity
that originally convinced me (Dave Hitz) that NetApp could “unify” SAN, NAS and iSCSI into a single
storage appliance.
Key-to: “Unify” was ‘WAFL’ (Filesystem + Volume Manager): When you create an aggregate [Disk
/SSD] the basic building block for Storage, the filesystem is already laid. Hence, when you create a
LUN, you create a LUN out of a ‘file’ (you get it?); Yes a file (special) that is presented as emulated
disk or Logical Unit. Therefore, imposes the maximum LUN limit on NetApp storage no matter what
Ontap version it is. End of the day, it’s the file size limitation that governs the LUN maximum size
(16TB).
It's fair to say that (My tribute): Pele was sent down to play football, Sachin Tendulkar to play Cricket,
Michael Jackson to create pop, Steve Jobs to create PC, Bill Gates to create software and Dave Hitz to
Revolutionize storage!
His book: How to castrate a bull! Is nothing like a technical jargon, it's one of the most interesting
and sometime adventurous ride, most recommended!!
ashwinwriter@gmail.com
March, 2019](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Is it possible to upgrade or revert ontap versions on a Simulator
Is it possible to upgrade or revert ontap versions on a Simulator!
https://www.slideshare.net/AshwinPawar/how-to-upgrade-ontap-simulator
Cannot split clone snapcenter 4.3
The document discusses an error when attempting to perform a SQL backup clone using SnapCenter 4.3 on a NetApp cDOT storage system using iSCSI. The error references SMB even though iSCSI was being used, because the SnapCenter storage connections were using the cluster management LIF instead of the data SVM management LIF, which is required for SAN protocols like iSCSI. The solution is to add the data SVM directly in SnapCenter using the SVM management LIF.
Network port administrative speed does not display correctly on NetApp storage
The document discusses a bug where the administrative speed of network ports on NetApp storage incorrectly displays as 1000 instead of 10000, even though the operational speed is 10000. This bug was fixed in ONTAP version 9.6RC1 and later. The writer observed this same issue on their FAS8200 running ONTAP 9.1, where the administrative speed of ports e0c and e0d both displayed as 1000 although the operational speed was 10000.
How to connect to NetApp FILER micro-USB console port
The document discusses how to connect to the console port of a NetApp Filer using a micro-USB cable and configure Putty serial terminal software. It explains that 115,200 baud rate with N-8-1 refers to transferring up to 115,200 bits per second with no parity, 8 data bits, and 1 stop bit. The steps are to connect the micro-USB cable from the Filer to a laptop, identify the detected COM port in the device manager, open Putty, select the correct COM port and baud rate settings, and click open under the session tab rather than the incorrect arrow shown.
NDMP backup models
Intercluster LIFs are preferred over data LIFs for NDMP control and data communication to ensure firewall access. If only data LIFs can be used, connection depends on the order interfaces appear in ifconfig output, not a hardcoded selection. More details are available at the provided KB article on properly configuring LIFs and firewall policies for NDMP backups.
How to use Active IQ tool to access filer information
This document provides instructions for using NetApp's Active IQ tool to access various types of information about a FILER, including cable diagrams, stack diagrams, RAID configuration visualization, hardware capacity headroom, and storage summaries. Users can log into the NetApp support site, enter the FILER name, click on the Configuration button, and select Visualization to view diagrams and other data pulled from the last AutoSupport report. The Active IQ tool extracts valuable information from a FILER's AutoSupport reports with some patience during loading of dynamic visualizations and data.
Steps to identify ONTAP latency related issues
The document provides steps to identify and understand latency issues on a NetApp ONTAP system. It analyzes sysstat output showing CPU utilization across various domains. While overall CPU usage is high at 97%, no single domain is fully utilized, indicating CPU is not the root cause of latency. It recommends investigating service level latency for specific LUNs, volumes, or protocols. Using ONTAP QoS commands, it identifies disk latency of 3ms on one aggregate which is within normal limits and not likely the root cause. The aggregate is 89% full which is also not yet concerning given its flash composition.
SnapDiff
SnapDiff is NetApp's proprietary file differencing engine that identifies files changed between snapshots. It compares block-level changes rather than traversing the entire file system, improving backup performance. The SnapDiff API allows backup applications to integrate with SnapDiff. SnapDiff performance is measured in files processed per hour and is impacted by very large or deeply nested directory structures rather than total storage size.
SnapDiff process flow chart
The SnapDiff process flowchart first takes a baseline backup snapshot of a volume. Next, it takes an incremental snapshot once it has the required information. It then begins the SnapDiff process to compare the snapshots and backup changed data.
SnapDiff performance issue
The document discusses troubleshooting a SnapDiff performance issue. Key factors that can affect SnapDiff throughput include hardware resources, Data ONTAP version, disk I/O latency, number of files in volumes, parallel SnapDiff sessions, and overlapping backup jobs. Symptoms of timeouts between ONTAP and the media agent during the indexing phase suggest the indexing is taking too long. The document provides workarounds like skipping cataloging and running it later, and using live browse for restores if needed before investigation is complete.
Volume level restore fails with error transient snapshot copy is not supported
A volume level restore failed with an error message indicating that a transient snapshot was not supported for the operation. The error occurred because the snapshot being used was a temporary one created during a SnapVault transfer where deduplication was enabled, making it an invalid snapshot. To resolve it, ensure the snapshot is a valid Snapmirror base snapshot without special characters in the name.
Disk reports predicted failure event
A predictive failure alert was reported for disk 1c.xx.xx in NetApp cluster node Cluster-02. The disk reported a predicted failure event. If a matching spare disk is available, rapid RAID recovery will begin by copying the data from the pre-failed disk to the spare. If no spares are available, the disk will eventually fail and cause the RAID group to degrade until a spare is available to reconstruct the data. Proactive assignment of a partner node's spare disk is recommended.
OCUM shows ONTAP cluster health degraded
The document discusses a degraded cluster health status shown in OCUM after adding a cDOT ONTAP controller. While the node pairing status was good, the cluster health showed as degraded. This was because OCUM only marks cluster health as OK after subsystem checks return OK, and one subsystem here showed as degraded, causing the overall cluster health to display as degraded. The solution is to ensure the cluster show and system health subsystem show both return OK.
NDMPCOPY lun from 7-mode NetApp to cDOT
The document describes how to copy archived SQL database LUNs from a 7-mode SnapVault snapshot to a cDOT SAN volume using NDMPCOPY in two phases. Phase 1 uses NDMPCOPY to transfer the LUN from the 7-mode snapshot to the cDOT destination volume. Phase 2 presents the copied LUN to the SQL box by mapping, rescaning disks, and bringing the LUN online so the databases can be retrieved.
Latency in storage
This document discusses components that can contribute to latency in an IT infrastructure, with a focus on storage latency. It identifies potential sources of latency including applications, hosts, virtual machines, networks, and storage components. It recommends commands like 'qos statistics volume performance show' and tools like OCUM/OPM to analyze latency across clustered Data ONTAP components and identify bottlenecks. The document aims to help storage administrators troubleshoot latency issues by examining statistics from different parts of the infrastructure to pinpoint the root cause.
More from Ashwin Pawar (20)
Our 5 senses can only perceive representation of reality but not the actual r...
Our 5 senses can only perceive representation of reality but not the actual r...
Oracle database might have problems with stale NFSv3 locks upon restart
Oracle database might have problems with stale NFSv3 locks upon restart
Is it possible to upgrade or revert ontap versions on a Simulator
Is it possible to upgrade or revert ontap versions on a Simulator
Network port administrative speed does not display correctly on NetApp storage
Network port administrative speed does not display correctly on NetApp storage
How to connect to NetApp FILER micro-USB console port
How to connect to NetApp FILER micro-USB console port
How to use Active IQ tool to access filer information
How to use Active IQ tool to access filer information
Volume level restore fails with error transient snapshot copy is not supported
Volume level restore fails with error transient snapshot copy is not supported
Recently uploaded
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Main news related to the CCS TSI 2023 (2023/1695)
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
Choosing The Best AWS Service For Your Website + API.pptx
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
5th LF Energy Power Grid Model Meet-up Slides
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
JavaLand 2024: Application Development Green Masterplan
My presentation slides I used at JavaLand 2024
Mutation Testing for Task-Oriented Chatbots
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
AppSec PNW: Android and iOS Application Security with MobSF
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
GNSS spoofing via SDR (Criptored Talks 2024)
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
Driving Business Innovation: Latest Generative AI Advancements & Success Story
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Fueling AI with Great Data with Airbyte Webinar
This talk will focus on how to collect data from a variety of sources, leveraging this data for RAG and other GenAI use cases, and finally charting your course to productionalization.
Leveraging the Graph for Clinical Trials and Standards
Katja Glaß
OpenStudyBuilder Community Manager - Katja Glaß Consulting
Marius Conjeaud
Principal Consultant - Neo4j
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
Skybuffer SAM4U tool for SAP license adoption
Manage and optimize your license adoption and consumption with SAM4U, an SAP free customer software asset management tool.
SAM4U, an SAP complimentary software asset management tool for customers, delivers a detailed and well-structured overview of license inventory and usage with a user-friendly interface. We offer a hosted, cost-effective, and performance-optimized SAM4U setup in the Skybuffer Cloud environment. You retain ownership of the system and data, while we manage the ABAP 7.58 infrastructure, ensuring fixed Total Cost of Ownership (TCO) and exceptional services through the SAP Fiori interface.
Taking AI to the Next Level in Manufacturing.pdf
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
Apps Break Data
How information systems are built or acquired puts information, which is what they should be about, in a secondary place. Our language adapted accordingly, and we no longer talk about information systems but applications. Applications evolved in a way to break data into diverse fragments, tightly coupled with applications and expensive to integrate. The result is technical debt, which is re-paid by taking even bigger "loans", resulting in an ever-increasing technical debt. Software engineering and procurement practices work in sync with market forces to maintain this trend. This talk demonstrates how natural this situation is. The question is: can something be done to reverse the trend?
Columbus Data & Analytics Wednesdays - June 2024
Columbus Data & Analytics Wednesdays, June 2024 with Maria Copot 20
HCL Notes and Domino License Cost Reduction in the World of DLAU
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-and-domino-license-cost-reduction-in-the-world-of-dlau/
The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
- Reducing license cost by finding and fixing misconfigurations and superfluous accounts
- How do CCB and CCX licenses really work?
- Understanding the DLAU tool and how to best utilize it
- Tips for common problem areas, like team mailboxes, functional/test users, etc
- Practical examples and best practices to implement right away
Dandelion Hashtable: beyond billion requests per second on a commodity server
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
Recently uploaded (20)
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Choosing The Best AWS Service For Your Website + API.pptx
Choosing The Best AWS Service For Your Website + API.pptx
JavaLand 2024: Application Development Green Masterplan
JavaLand 2024: Application Development Green Masterplan
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
AppSec PNW: Android and iOS Application Security with MobSF
AppSec PNW: Android and iOS Application Security with MobSF
Driving Business Innovation: Latest Generative AI Advancements & Success Story
Driving Business Innovation: Latest Generative AI Advancements & Success Story
Leveraging the Graph for Clinical Trials and Standards
Leveraging the Graph for Clinical Trials and Standards
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
HCL Notes and Domino License Cost Reduction in the World of DLAU
HCL Notes and Domino License Cost Reduction in the World of DLAU
Dandelion Hashtable: beyond billion requests per second on a commodity server
Dandelion Hashtable: beyond billion requests per second on a commodity server
NAS vs SAN
- 1. NFS (NAS) vs SAN Differences From client's (Application) perspective : There are no differences - I am quoting 'Dave Hitz' words below, he keeps technical matters so simple that it gives some people - heebie-jeebies! Dave Hiltz’s words of wisdom: At the protocol level, block-reads over NFS and block-reads over iSCSI are almost identical. It’s true that NFS has lots of fancy requests (which is now substantially strip down in NFSv4) that iSCSI and Fibre Channel SAN do not, such as to create directories, set permissions, move files, and so on, but none of that matters when all you do is read and write blocks of data. "Block-reads over NFS and Block-reads over iSCSI are almost identical" NFS: Requests a certain number of bytes, starting at a given byte offset. Uses a file handle to identify the blocks. SAN : Requests a certain number of blocks, starting at a given block offset. Uses a LUN to identify the container holding the blocks. “With NFS you must divide by 512 to convert bytes to blocks. So what!”
- 2. Different container but same matter! A LUN and a file are both just containers that hold blocks of data, so get over it. It was this similarity that originally convinced me (Dave Hitz) that NetApp could “unify” SAN, NAS and iSCSI into a single storage appliance. Key-to: “Unify” was ‘WAFL’ (Filesystem + Volume Manager): When you create an aggregate [Disk /SSD] the basic building block for Storage, the filesystem is already laid. Hence, when you create a LUN, you create a LUN out of a ‘file’ (you get it?); Yes a file (special) that is presented as emulated disk or Logical Unit. Therefore, imposes the maximum LUN limit on NetApp storage no matter what Ontap version it is. End of the day, it’s the file size limitation that governs the LUN maximum size (16TB). It's fair to say that (My tribute): Pele was sent down to play football, Sachin Tendulkar to play Cricket, Michael Jackson to create pop, Steve Jobs to create PC, Bill Gates to create software and Dave Hitz to Revolutionize storage! His book: How to castrate a bull! Is nothing like a technical jargon, it's one of the most interesting and sometime adventurous ride, most recommended!! ashwinwriter@gmail.com March, 2019