August 2018 version of my "What does rename() do", includes the full details on what the Hadoop MapReduce and Spark commit protocols are, so the audience will really understand why rename really, really matters
Put is the new rename: San Jose Summit EditionSteve Loughran
This is the June 2018 variant of the "Put is the new Rename Talk", looking at Hadoop stack integration with object stores, including S3, Azure storage and GCS.
The MathWorks introduced MATLAB support for HDF5 in 2002 via three high-level functions: HDF5INFO, HDF5READ, and HDF5WRITE. These functions worked well for their purpose-providing simple interfaces to a complicated file format-but MATLAB users requested finer control over their HDF5 files and the HDF5 library. MATLAB 7.3 (R2006b) adds this precise level of support for version 1.6.5 of the HDF5 library via a close mapping of the HDF5 C API to MATLAB function calls.
This presentation will briefly introduce the earlier, high-level HDF5 interface (and its limitations) before showing in detail the low-level HDF5 functions. It will show how to interact with the HDF5 library and files using the thirteen classes of functions in MATLAB, which encapsulate groupings of functionality found in the HDF5 C API. But because MATLAB is itself a higher-level language than C, we will also present MATLAB's extensions and modifications of the HDF5 C API that make it more MATLAB-like, work with defined values, and perform ID and memory management.
Wrapping a library like HDF5 requires a great deal of effort and design, and we will briefly present a general-purpose mechanism for creating close mappings between library interfaces and an application like MATLAB. One of our goals in this presentation is to facilitate communication with The HDF Group about how The MathWorks builds our HDF5 interfaces in order to ease adoption of future versions of the HDF5 library in large, general-purpose applications.
HDF5 is a powerful and feature-rich creature, and getting the most out of it requires powerful tools. The MathWorks provides a "low-level" interface to the HDF5 library that closely corresponds to the C API and exposes much of its richness. This short tutorial will present ways to use the low-level MATLAB interface to build those tools and tackle such topics as subsetting, chunking, and compression.
How to use Parquet as a basis for ETL and analyticsJulien Le Dem
Parquet is a columnar format designed to be extremely efficient and interoperable across the hadoop ecosystem. Its integration in most of the Hadoop processing frameworks (Impala, Hive, Pig, Cascading, Crunch, Scalding, Spark, …) and serialization models (Thrift, Avro, Protocol Buffers, …) makes it easy to use in existing ETL and processing pipelines, while giving flexibility of choice on the query engine (whether in Java or C++). In this talk, we will describe how one can us Parquet with a wide variety of data analysis tools like Spark, Impala, Pig, Hive, and Cascading to create powerful, efficient data analysis pipelines. Data management is simplified as the format is self describing and handles schema evolution. Support for nested structures enables more natural modeling of data for Hadoop compared to flat representations that create the need for often costly joins.
August 2018 version of my "What does rename() do", includes the full details on what the Hadoop MapReduce and Spark commit protocols are, so the audience will really understand why rename really, really matters
Put is the new rename: San Jose Summit EditionSteve Loughran
This is the June 2018 variant of the "Put is the new Rename Talk", looking at Hadoop stack integration with object stores, including S3, Azure storage and GCS.
The MathWorks introduced MATLAB support for HDF5 in 2002 via three high-level functions: HDF5INFO, HDF5READ, and HDF5WRITE. These functions worked well for their purpose-providing simple interfaces to a complicated file format-but MATLAB users requested finer control over their HDF5 files and the HDF5 library. MATLAB 7.3 (R2006b) adds this precise level of support for version 1.6.5 of the HDF5 library via a close mapping of the HDF5 C API to MATLAB function calls.
This presentation will briefly introduce the earlier, high-level HDF5 interface (and its limitations) before showing in detail the low-level HDF5 functions. It will show how to interact with the HDF5 library and files using the thirteen classes of functions in MATLAB, which encapsulate groupings of functionality found in the HDF5 C API. But because MATLAB is itself a higher-level language than C, we will also present MATLAB's extensions and modifications of the HDF5 C API that make it more MATLAB-like, work with defined values, and perform ID and memory management.
Wrapping a library like HDF5 requires a great deal of effort and design, and we will briefly present a general-purpose mechanism for creating close mappings between library interfaces and an application like MATLAB. One of our goals in this presentation is to facilitate communication with The HDF Group about how The MathWorks builds our HDF5 interfaces in order to ease adoption of future versions of the HDF5 library in large, general-purpose applications.
HDF5 is a powerful and feature-rich creature, and getting the most out of it requires powerful tools. The MathWorks provides a "low-level" interface to the HDF5 library that closely corresponds to the C API and exposes much of its richness. This short tutorial will present ways to use the low-level MATLAB interface to build those tools and tackle such topics as subsetting, chunking, and compression.
How to use Parquet as a basis for ETL and analyticsJulien Le Dem
Parquet is a columnar format designed to be extremely efficient and interoperable across the hadoop ecosystem. Its integration in most of the Hadoop processing frameworks (Impala, Hive, Pig, Cascading, Crunch, Scalding, Spark, …) and serialization models (Thrift, Avro, Protocol Buffers, …) makes it easy to use in existing ETL and processing pipelines, while giving flexibility of choice on the query engine (whether in Java or C++). In this talk, we will describe how one can us Parquet with a wide variety of data analysis tools like Spark, Impala, Pig, Hive, and Cascading to create powerful, efficient data analysis pipelines. Data management is simplified as the format is self describing and handles schema evolution. Support for nested structures enables more natural modeling of data for Hadoop compared to flat representations that create the need for often costly joins.
So you want to get started with Hadoop, but how. This session will show you how to get started with Hadoop development using Pig. Prior Hadoop experience is not needed.
Thursday, May 8th, 02:00pm-02:50pm
The HDF Group provides NCL/IDL/MATLAB example codes and plots for many NASA HDF-EOS2 and HDF4 products. These example codes and plots can be found under http://hdfeos.org/zoo. This slide addresses some common issues on using these tools to visualize NASA HDF-EOS2 and HDF4 products.
Apache Tajo on Swift: Bringing SQL to the OpenStack WorldJihoon Son
This slide was presented at the SK Telecom T Developer Forum. It contains the brief evaluation results of the query execution performance of Tajo on Swift.
I conducted two kinds of experiments; The first experiment was to compare the performance of Tajo with on another distributed storage, i.e., HDFS. And the second experiment was the scalability test of Swift.
Interestingly, the scan performance on Swift is slower more than two times than that on HDFS. In addition, the task scheduling time on Swift is much greater than that on HDFS, which means the query initialization cost is very high.
Vibrant Technologies is headquarted in Mumbai,India.We are the best Oracle training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Oracle classes in Mumbai according to our students and corporators
Get acquainted with a distributed, reliable tool/service for collecting a large amount of streaming data to centralized storage with their architecture.
Let me know if anything is required. Happy to help.
Ping me google #bobrupakroy.
take care!
[db tech showcase Tokyo 2017] C23: Lessons from SQLite4 by SQLite.org - Richa...Insight Technology, Inc.
SQLite4 was a project started at the beginning of 2012 and designed to provide a follow-on to SQLite3 without the constraints of backwards compatibility. SQLite4 was built around a Log Structured Merge (LSM) storage engine that is transactional, stores all content in a single file on disk, and that is faster than LevelDB. Other innovations in include the use of decimal floating-point arthimetic and a single storage engine namespace used for all tables and indexes. Expectations were initially high. However, development stopped about 2.5 years later, after finding that the design of SQLite4 would never be competitive with SQLite3. This talk overviews the technological ideas tried in SQLite4 and discusses why they did not work out for the kinds of workloads typically encountered for an embedded database engine.
Get to know the configuration with Hadoop installation types and also handling of the HDFS files.
Let me know if anything is required. Happy to help.
Ping me google #bobrupakroy.
Talk soon!
Berlin Buzzwords 2017 talk: A look at what our storage models, metaphors and APIs are, showing how we need to rethink the Posix APIs to work with object stores, while looking at different alternatives for local NVM.
This is the unabridged talk; the BBuzz talk was 20 minutes including demo and questions, so had ~half as many slides
So you want to get started with Hadoop, but how. This session will show you how to get started with Hadoop development using Pig. Prior Hadoop experience is not needed.
Thursday, May 8th, 02:00pm-02:50pm
The HDF Group provides NCL/IDL/MATLAB example codes and plots for many NASA HDF-EOS2 and HDF4 products. These example codes and plots can be found under http://hdfeos.org/zoo. This slide addresses some common issues on using these tools to visualize NASA HDF-EOS2 and HDF4 products.
Apache Tajo on Swift: Bringing SQL to the OpenStack WorldJihoon Son
This slide was presented at the SK Telecom T Developer Forum. It contains the brief evaluation results of the query execution performance of Tajo on Swift.
I conducted two kinds of experiments; The first experiment was to compare the performance of Tajo with on another distributed storage, i.e., HDFS. And the second experiment was the scalability test of Swift.
Interestingly, the scan performance on Swift is slower more than two times than that on HDFS. In addition, the task scheduling time on Swift is much greater than that on HDFS, which means the query initialization cost is very high.
Vibrant Technologies is headquarted in Mumbai,India.We are the best Oracle training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Oracle classes in Mumbai according to our students and corporators
Get acquainted with a distributed, reliable tool/service for collecting a large amount of streaming data to centralized storage with their architecture.
Let me know if anything is required. Happy to help.
Ping me google #bobrupakroy.
take care!
[db tech showcase Tokyo 2017] C23: Lessons from SQLite4 by SQLite.org - Richa...Insight Technology, Inc.
SQLite4 was a project started at the beginning of 2012 and designed to provide a follow-on to SQLite3 without the constraints of backwards compatibility. SQLite4 was built around a Log Structured Merge (LSM) storage engine that is transactional, stores all content in a single file on disk, and that is faster than LevelDB. Other innovations in include the use of decimal floating-point arthimetic and a single storage engine namespace used for all tables and indexes. Expectations were initially high. However, development stopped about 2.5 years later, after finding that the design of SQLite4 would never be competitive with SQLite3. This talk overviews the technological ideas tried in SQLite4 and discusses why they did not work out for the kinds of workloads typically encountered for an embedded database engine.
Get to know the configuration with Hadoop installation types and also handling of the HDFS files.
Let me know if anything is required. Happy to help.
Ping me google #bobrupakroy.
Talk soon!
Berlin Buzzwords 2017 talk: A look at what our storage models, metaphors and APIs are, showing how we need to rethink the Posix APIs to work with object stores, while looking at different alternatives for local NVM.
This is the unabridged talk; the BBuzz talk was 20 minutes including demo and questions, so had ~half as many slides
A lecture on Apace Spark, the well-known open source cluster computing framework. The course consisted of three parts: a) install the environment through Docker, b) introduction to Spark as well as advanced features, and c) hands-on training on three (out of five) of its APIs, namely Core, SQL \ Dataframes, and MLlib.
Facebook's Approach to Big Data Storage ChallengeDataWorks Summit
Facebook data warehouse cluster stores more than 100PB of data, with 500+ terabytes of data entered into the clusters every day. To meet the capacity requirement of future data growth, storing data in a cost-effective way becomes a top priority of Facebook data infrastructure team. This talk will present various solutions we use to reduce our warehouse cluster`s data footprint: (1) Smart retention: history-based hive table retention control (2) Increase RCFile compression ratio through clever sorting (3) HDFS file-level raiding to reduce the default replication factor of 3 to a lower ratio; (4) Attack small-file raiding problem though Directory-level raiding and raid-aware compaction.
(Berkeley CS186 guest lecture) Big Data Analytics Systems: What Goes Around C...Reynold Xin
(Berkeley CS186 guest lecture)
Big Data Analytics Systems: What Goes Around Comes Around
Introduction to MapReduce, GFS, HDFS, Spark, and differences between "Big Data" and database systems.
Apache top level project, open-source implementation of frameworks for reliable, scalable, distributed computing and data storage.
It is a flexible and highly-available architecture for large scale computation and data processing on a network of commodity hardware.
This Tutorial is designed for the HDF5 users with some HDF5 experience. It will cover properties of the HDF5 objects that affect I/O performance and file sizes. The following HDF5 features will be discussed: partial I/O, chunking and compression, and complex HDF5 datatypes such as strings, variable-length arrays and compound datatypes.
We will also discuss references to objects and datasets regions and how they can be used for indexing. Participants will work with the Tutorial examples and exercises during the hands-on sessions.
The lessons from implementing a twitter bot designed to live on a raspberry pi and heckle politicians —and deployed into production in the 2017 UK General Election
A review of the state of cloud store integration with the Hadoop stack in 2018; including S3Guard, the new S3A committers and S3 Select.
Presented at Dataworks Summit Berlin 2018, where the demos were live.
Dancing Elephants: Working with Object Storage in Apache Spark and HiveSteve Loughran
A talk looking at the intricate details of working with an object store from Hadoop, Hive, Spark, etc, why the "filesystem" metaphor falls down, and what work myself and others have been up to to try and fix things
Apache Spark and Object Stores —for London Spark User GroupSteve Loughran
The March 2017 version of the "Apache Spark and Object Stores", includes coverage of the Staging Committer. If you'd been at the talk you'd have seen the projector fail just before the demo. It worked earlier! Honest!
Cloud deployments of Apache Hadoop are becoming more commonplace. Yet Hadoop and it's applications don't integrate that well —something which starts right down at the file IO operations. This talk looks at how to make use of cloud object stores in Hadoop applications, including Hive and Spark. It will go from the foundational "what's an object store?" to the practical "what should I avoid" and the timely "what's new in Hadoop?" — the latter covering the improved S3 support in Hadoop 2.8+. I'll explore the details of benchmarking and improving object store IO in Hive and Spark, showing what developers can do in order to gain performance improvements in their own code —and equally, what they must avoid. Finally, I'll look at ongoing work, especially "S3Guard" and what its fast and consistent file metadata operations promise.
My talk from Berlin Buzzwords 2016, looking at whether it is actually possible to lock down a household to the extent you could call it "secure". I also try to highlight that we need to consider "privacy" alongside security.
Hadoop and Kerberos: the Madness Beyond the Gate: January 2016 editionSteve Loughran
An update of the "Hadoop and Kerberos: the Madness Beyond the Gate" talk, covering recent work "the Fix Kerberos" JIRA and its first deliverable: KDiag
GraphSummit Paris - The art of the possible with Graph TechnologyNeo4j
Sudhir Hasbe, Chief Product Officer, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
AI Genie Review: World’s First Open AI WordPress Website CreatorGoogle
AI Genie Review: World’s First Open AI WordPress Website Creator
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-genie-review
AI Genie Review: Key Features
✅Creates Limitless Real-Time Unique Content, auto-publishing Posts, Pages & Images directly from Chat GPT & Open AI on WordPress in any Niche
✅First & Only Google Bard Approved Software That Publishes 100% Original, SEO Friendly Content using Open AI
✅Publish Automated Posts and Pages using AI Genie directly on Your website
✅50 DFY Websites Included Without Adding Any Images, Content Or Doing Anything Yourself
✅Integrated Chat GPT Bot gives Instant Answers on Your Website to Visitors
✅Just Enter the title, and your Content for Pages and Posts will be ready on your website
✅Automatically insert visually appealing images into posts based on keywords and titles.
✅Choose the temperature of the content and control its randomness.
✅Control the length of the content to be generated.
✅Never Worry About Paying Huge Money Monthly To Top Content Creation Platforms
✅100% Easy-to-Use, Newbie-Friendly Technology
✅30-Days Money-Back Guarantee
See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
#AIGenieApp #AIGenieBonus #AIGenieBonuses #AIGenieDemo #AIGenieDownload #AIGenieLegit #AIGenieLiveDemo #AIGenieOTO #AIGeniePreview #AIGenieReview #AIGenieReviewandBonus #AIGenieScamorLegit #AIGenieSoftware #AIGenieUpgrades #AIGenieUpsells #HowDoesAlGenie #HowtoBuyAIGenie #HowtoMakeMoneywithAIGenie #MakeMoneyOnline #MakeMoneywithAIGenie
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
E-commerce Application Development Company.pdfHornet Dynamics
Your business can reach new heights with our assistance as we design solutions that are specifically appropriate for your goals and vision. Our eCommerce application solutions can digitally coordinate all retail operations processes to meet the demands of the marketplace while maintaining business continuity.
Innovating Inference - Remote Triggering of Large Language Models on HPC Clus...Globus
Large Language Models (LLMs) are currently the center of attention in the tech world, particularly for their potential to advance research. In this presentation, we'll explore a straightforward and effective method for quickly initiating inference runs on supercomputers using the vLLM tool with Globus Compute, specifically on the Polaris system at ALCF. We'll begin by briefly discussing the popularity and applications of LLMs in various fields. Following this, we will introduce the vLLM tool, and explain how it integrates with Globus Compute to efficiently manage LLM operations on Polaris. Attendees will learn the practical aspects of setting up and remotely triggering LLMs from local machines, focusing on ease of use and efficiency. This talk is ideal for researchers and practitioners looking to leverage the power of LLMs in their work, offering a clear guide to harnessing supercomputing resources for quick and effective LLM inference.
OpenMetadata Community Meeting - 5th June 2024OpenMetadata
The OpenMetadata Community Meeting was held on June 5th, 2024. In this meeting, we discussed about the data quality capabilities that are integrated with the Incident Manager, providing a complete solution to handle your data observability needs. Watch the end-to-end demo of the data quality features.
* How to run your own data quality framework
* What is the performance impact of running data quality frameworks
* How to run the test cases in your own ETL pipelines
* How the Incident Manager is integrated
* Get notified with alerts when test cases fail
Watch the meeting recording here - https://www.youtube.com/watch?v=UbNOje0kf6E
Globus Connect Server Deep Dive - GlobusWorld 2024Globus
We explore the Globus Connect Server (GCS) architecture and experiment with advanced configuration options and use cases. This content is targeted at system administrators who are familiar with GCS and currently operate—or are planning to operate—broader deployments at their institution.
Mobile App Development Company In Noida | Drona InfotechDrona Infotech
Looking for a reliable mobile app development company in Noida? Look no further than Drona Infotech. We specialize in creating customized apps for your business needs.
Visit Us For : https://www.dronainfotech.com/mobile-application-development/
Utilocate offers a comprehensive solution for locate ticket management by automating and streamlining the entire process. By integrating with Geospatial Information Systems (GIS), it provides accurate mapping and visualization of utility locations, enhancing decision-making and reducing the risk of errors. The system's advanced data analytics tools help identify trends, predict potential issues, and optimize resource allocation, making the locate ticket management process smarter and more efficient. Additionally, automated ticket management ensures consistency and reduces human error, while real-time notifications keep all relevant personnel informed and ready to respond promptly.
The system's ability to streamline workflows and automate ticket routing significantly reduces the time taken to process each ticket, making the process faster and more efficient. Mobile access allows field technicians to update ticket information on the go, ensuring that the latest information is always available and accelerating the locate process. Overall, Utilocate not only enhances the efficiency and accuracy of locate ticket management but also improves safety by minimizing the risk of utility damage through precise and timely locates.
Graspan: A Big Data System for Big Code AnalysisAftab Hussain
We built a disk-based parallel graph system, Graspan, that uses a novel edge-pair centric computation model to compute dynamic transitive closures on very large program graphs.
We implement context-sensitive pointer/alias and dataflow analyses on Graspan. An evaluation of these analyses on large codebases such as Linux shows that their Graspan implementations scale to millions of lines of code and are much simpler than their original implementations.
These analyses were used to augment the existing checkers; these augmented checkers found 132 new NULL pointer bugs and 1308 unnecessary NULL tests in Linux 4.4.0-rc5, PostgreSQL 8.3.9, and Apache httpd 2.2.18.
- Accepted in ASPLOS ‘17, Xi’an, China.
- Featured in the tutorial, Systemized Program Analyses: A Big Data Perspective on Static Analysis Scalability, ASPLOS ‘17.
- Invited for presentation at SoCal PLS ‘16.
- Invited for poster presentation at PLDI SRC ‘16.
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI AppGoogle
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI App
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-fusion-buddy-review
AI Fusion Buddy Review: Key Features
✅Create Stunning AI App Suite Fully Powered By Google's Latest AI technology, Gemini
✅Use Gemini to Build high-converting Converting Sales Video Scripts, ad copies, Trending Articles, blogs, etc.100% unique!
✅Create Ultra-HD graphics with a single keyword or phrase that commands 10x eyeballs!
✅Fully automated AI articles bulk generation!
✅Auto-post or schedule stunning AI content across all your accounts at once—WordPress, Facebook, LinkedIn, Blogger, and more.
✅With one keyword or URL, generate complete websites, landing pages, and more…
✅Automatically create & sell AI content, graphics, websites, landing pages, & all that gets you paid non-stop 24*7.
✅Pre-built High-Converting 100+ website Templates and 2000+ graphic templates logos, banners, and thumbnail images in Trending Niches.
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See My Other Reviews Article:
(1) AI Genie Review: https://sumonreview.com/ai-genie-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
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May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
A Study of Variable-Role-based Feature Enrichment in Neural Models of CodeAftab Hussain
Understanding variable roles in code has been found to be helpful by students
in learning programming -- could variable roles help deep neural models in
performing coding tasks? We do an exploratory study.
- These are slides of the talk given at InteNSE'23: The 1st International Workshop on Interpretability and Robustness in Neural Software Engineering, co-located with the 45th International Conference on Software Engineering, ICSE 2023, Melbourne Australia
Enterprise Resource Planning System includes various modules that reduce any business's workload. Additionally, it organizes the workflows, which drives towards enhancing productivity. Here are a detailed explanation of the ERP modules. Going through the points will help you understand how the software is changing the work dynamics.
To know more details here: https://blogs.nyggs.com/nyggs/enterprise-resource-planning-erp-system-modules/
In the ever-evolving landscape of technology, enterprise software development is undergoing a significant transformation. Traditional coding methods are being challenged by innovative no-code solutions, which promise to streamline and democratize the software development process.
This shift is particularly impactful for enterprises, which require robust, scalable, and efficient software to manage their operations. In this article, we will explore the various facets of enterprise software development with no-code solutions, examining their benefits, challenges, and the future potential they hold.
Do you want Software for your Business? Visit Deuglo
Deuglo has top Software Developers in India. They are experts in software development and help design and create custom Software solutions.
Deuglo follows seven steps methods for delivering their services to their customers. They called it the Software development life cycle process (SDLC).
Requirement — Collecting the Requirements is the first Phase in the SSLC process.
Feasibility Study — after completing the requirement process they move to the design phase.
Design — in this phase, they start designing the software.
Coding — when designing is completed, the developers start coding for the software.
Testing — in this phase when the coding of the software is done the testing team will start testing.
Installation — after completion of testing, the application opens to the live server and launches!
Maintenance — after completing the software development, customers start using the software.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
We describe the deployment and use of Globus Compute for remote computation. This content is aimed at researchers who wish to compute on remote resources using a unified programming interface, as well as system administrators who will deploy and operate Globus Compute services on their research computing infrastructure.
4. • Publish data for other applications
• Process data published by other applications
• Persist state for future instances of an application
• Work with more data than fits into RAM
• Share data with other instances of same application
• Save things people care about & want to get back
11. val work = new Path("s3a://stevel-frankfurt/work")
val fs = work.getFileSystem(new Configuration())
val task00 = new Path(work, "_temp/task00")
fs.mkdirs(task00)
val out = fs.create(new Path(task00, "part-00"), false)
out.writeChars("hello")
out.close();
fs.listStatus(task00).foreach(stat =>
fs.rename(stat.getPath, work)
)
15. Amazon S3 doesn't have a rename()
/
work
_temp
part-00 part-01
00
00
00
01
01
part-01
LIST /work/_temp/task-01/*
task-00 task-01
01
01
01
COPY /work/_temp/task-01/part-01 /work/part-01
DELETE /work/_temp/task-01/part-01
01
S3 Shards
16. work/part-01
01
01
01
Fix: end the metaphor
00
00
00
POST /work/part-01?uploads => UploadID
POST /work/part01?uploadId=UploadID&partNumber=01
POST /work/part01?uploadId=UploadID&partNumber=02
POST /work/part01?uploadId=UploadID&partNumber=03
work/part-00
19. What else to rethink?
• s/Directories/r/patterns/
• seek()+read() sequences ==> Scatter/Gather IO
• Blocking operations ==> async block reads executed out of order
• TODO: How to work with Eventually Consistent data?
HADOOP-11867
20. SSD via SATA
SSD via NVMe/M.2
Future NVM technologies
Model and API #2: memory
23. NVM moves the commit problem into
memory I/O
• How to split internal state into persistent and transient?
• When is data saved to NVM? (cache flushed, sync in memory buffers, ...)
• How to co-ordinate shared R/W access over RDMA?
• Versioning?
• How do we write apps for a world where rebooting doesn't reset our state?
Catch up: read "The Morning Paper" summaries of research
26. hadoop s3guard select -header use -limit 20
s3a://hwdev-steve-ireland-new/steve/boris.csv
"SELECT * FROM S3OBJECT s WHERE
endstation_name = 'Bayswater Road: Hyde Park'"
S3 Select: SQL in the object store
"9347774","1506","5903","04/01/2012 00:32","153","Bayswater Road:
Hyde Park","04/01/2012 00:06","151","Chepstow Villas: Notting
Hill"
"9348043","607","5365","04/01/2012 01:09","153","Bayswater Road:
Hyde Park","04/01/2012 00:59","153","Bayswater Road: Hyde Park"
"9363308","708","5167","04/01/2012 06:30","153","Bayswater Road:
Hyde Park","04/01/2012 06:18","404","Palace Gate: Kensington
Gardens"
...
27. Summary:
As storage changes so must the models
• Object stores address scale & HA —at cost of semantics and performance
• Non-Volatile Memory is the other radical change
• Posix metaphor isn't suited to either —what next?
• SQL makes all this someone else's problem
(leaving only O/R mapping, transaction isolation...)
Facebook prineville photo store is probably at the far end of the spectrum
Everything usies the Hadoop APIs to talk to both HDFS, Hadoop Compatible Filesystems and object stores; the Hadoop FS API. There's actually two: the one with a clean split between client side and "driver side", and the older one which is a direct connect. Most use the latter and actually, in terms of opportunities for object store integration tweaking, this is actually the one where can innovate with the most easily. That is: there's nothing in the way.
Under the FS API go filesystems and object stores.
HDFS is "real" filesystem; WASB/Azure close enough. What is "real?". Best test: can support HBase.
This is how we commit work in Hadoop FileOutputFormat, and so, transitively, how Spark does it too (Hive does some other things, which I'm ignoring, but are more manifest file driven)
This is my rough guess at a C-level operation against mmaped data today. Ignoringthe open/sync stuff, then the writes in the middle are the operations we need to worry about, as they update the datastructures in-situ. Nonatomically.
This is my rough guess at a C-level operation against mmaped data today. Ignoringthe open/sync stuff, then the writes in the middle are the operations we need to worry about, as they update the datastructures in-situ. Nonatomically.
Work like RAMCloud has led the way here, go look at the papers. But that was at RAM, not NVM, where we have the persistence problem
Some form of LSF model tends to be used, which ties in well with raw SSD (don't know about other techs, do know that non-raw SSD doesn't really suit LFS)
If you look at code, we generally mix persisted (and read back) data with transient; load/save isn't so much seriaiizing out data structures as marshalling the persistent parts to a form we think they will be robust over time, unmarshalling them later (exceptions: Java Serialization, which is notoriously brittle and insecure)
What apps work best here? Could you extend Spark to make RDDs persistent & shared, so you can persist them simply by copying to part of cluster memory?, e.g a "NVMOutputFormat"