Who's online, how they're using the Web, and what they're accessing have changed significantly over the last few years. All these factors are straining websites, and their outdated architectures. This presentation covers these changes by the numbers and looks at the emergence of a Web scale architecture that takes advantage of Memcached to improve performance and scalability of today's dynamic websites. The recorded webinar is now available at: http://bit.ly/aPe2T.
Fractal Tree Indexes : From Theory to PracticeTim Callaghan
Fractal Tree Indexes are compared to the indexing incumbent, B-trees. The capabilities are then shown what they bring to MySQL (in TokuDB) and MongoDB (in TokuMX).
Presented at Percona Live London 2013.
Who's online, how they're using the Web, and what they're accessing have changed significantly over the last few years. All these factors are straining websites, and their outdated architectures. This presentation covers these changes by the numbers and looks at the emergence of a Web scale architecture that takes advantage of Memcached to improve performance and scalability of today's dynamic websites. The recorded webinar is now available at: http://bit.ly/aPe2T.
Fractal Tree Indexes : From Theory to PracticeTim Callaghan
Fractal Tree Indexes are compared to the indexing incumbent, B-trees. The capabilities are then shown what they bring to MySQL (in TokuDB) and MongoDB (in TokuMX).
Presented at Percona Live London 2013.
The Middle School Career Education Program comes with –
Kids Career Test (Printed Version)
Colors to Careers Posters
Color Key
Starter Kit
Training Manual
Flash Cards and Bingo Cards
Scalable XQuery Processing with Zorba on top of MongoDBWilliam Candillon
Since a couple of years, the NoSQL movement has developed a variety of open-source document stores. Most of them focus on high availability, horizontal scalability, and are designed to run on commodity hardware. These products have gained great traction in the industry to store large amounts of flexible data (mostly JSON). In the meantime, XQuery has evolved to a standardized, full-fledged programming language for XML with native support for complex queries, indexes, updates, full-text search, and scripting. Moreover, JSON has recently been added as a first-level datatype into the language. As of today, it is without doubt the most robust and productive technology to process flexible data.
The aim of this talk is to showcase the benefits that can be achieved by integrating the Zorba XQuery Processor with MongoDB. We will introduce the 28msec platform that seamlessly stores, indexes, and manages flexible data entirely in XQuery. The data itself is stored in MongoDB. The platform leverages MongoDB’s indexes, sharding, and consistency guarantees to scale-out horizontally. The talk will conclude by showing a benchmark of the platform and discuss perspectives of the outlined approach.
The Middle School Career Education Program comes with –
Kids Career Test (Printed Version)
Colors to Careers Posters
Color Key
Starter Kit
Training Manual
Flash Cards and Bingo Cards
Scalable XQuery Processing with Zorba on top of MongoDBWilliam Candillon
Since a couple of years, the NoSQL movement has developed a variety of open-source document stores. Most of them focus on high availability, horizontal scalability, and are designed to run on commodity hardware. These products have gained great traction in the industry to store large amounts of flexible data (mostly JSON). In the meantime, XQuery has evolved to a standardized, full-fledged programming language for XML with native support for complex queries, indexes, updates, full-text search, and scripting. Moreover, JSON has recently been added as a first-level datatype into the language. As of today, it is without doubt the most robust and productive technology to process flexible data.
The aim of this talk is to showcase the benefits that can be achieved by integrating the Zorba XQuery Processor with MongoDB. We will introduce the 28msec platform that seamlessly stores, indexes, and manages flexible data entirely in XQuery. The data itself is stored in MongoDB. The platform leverages MongoDB’s indexes, sharding, and consistency guarantees to scale-out horizontally. The talk will conclude by showing a benchmark of the platform and discuss perspectives of the outlined approach.
A quick overview of the seed for Meandre 2.0 series. It covers the main motivations moving forward and the disruptive changes introduced via the use of Scala and MongoDB
A high level overview of MeteorJS, Amazon Web Services, and how to scale MeteorJS on Amazon's cloud to handle tends of thousands of concurrent websocket connections.
Flink Forward Berlin 2017: Robert Metzger - Keep it going - How to reliably a...Flink Forward
Let’s be honest: Running a distributed stateful stream processor that is able to handle terabytes of state and tens of gigabytes of data per second while being highly available and correct (in an exactly-once sense) does not work without any planning, configuration and monitoring. While the Flink developer community tries to make everything as simple as possible, it is still important to be aware of all the requirements and implications In this talk, we will provide some insights into the greatest operations mysteries of Flink from a high-level perspective: - Capacity and resource planning: Understand the theoretical limits. - Memory and CPU configuration: Distribute resources according to your needs. - Setting up High Availability: Planning for failures. - Checkpointing and State Backends: Ensure correctness and fast recovery For each of the listed topics, we will introduce the concepts of Flink and provide some best practices we have learned over the past years supporting Flink users in production.
Webinar: Adobe Experience Manager Clustering Made Easy on MongoDB MongoDB
Adobe Experience Manager helps you organize and manage the delivery of creative assets and other content across all of your digital marketing channels. Experience Manager customers who take advantage of MongoDB can deploy a highly scalable content repository to support their business needs, as well as migrate content from legacy systems. In this session, you'll learn how you can use MongoDB to deploy AEM systems at scale. The session will cover installation, sizing, and the tools available to automate and manage your cluster.
Isomorphic JavaScript applications can share the same code and run on both the front end and back end. It is also a spectrum containing applications that share minimal bits of validation logic with ones that share a bulk of the application code. Nashorn is a new JavaScript engine for Java that was released with Java 8. The Nashorn JavaScript engine makes isomorphic web apps on the JVM possible by allowing the exact same browser code to run on the server. This enables us to achieve the don’t-repeat-yourself (DRY) principle, by reducing repetition in a multitier architecture. This presentation covers the key concepts, rationale, and categories of Isomorphic JavaScript and how it makes your large applications maintainable.
MongoDB Europe 2016 - Powering Microservices with Docker, Kubernetes, and KafkaMongoDB
Organisations are building their applications around microservice architectures because of the flexibility, speed of delivery, and maintainability they deliver. This session introduces you to technologies such as Docker, Kubernetes & Kafka which are driving the microservices revolution. Learn about containers and orchestration – and most importantly how to exploit them for stateful services such as MongoDB.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Enhancing Performance with Globus and the Science DMZGlobus
ESnet has led the way in helping national facilities—and many other institutions in the research community—configure Science DMZs and troubleshoot network issues to maximize data transfer performance. In this talk we will present a summary of approaches and tips for getting the most out of your network infrastructure using Globus Connect Server.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Welcome to the first live UiPath Community Day Dubai! Join us for this unique occasion to meet our local and global UiPath Community and leaders. You will get a full view of the MEA region's automation landscape and the AI Powered automation technology capabilities of UiPath. Also, hosted by our local partners Marc Ellis, you will enjoy a half-day packed with industry insights and automation peers networking.
📕 Curious on our agenda? Wait no more!
10:00 Welcome note - UiPath Community in Dubai
Lovely Sinha, UiPath Community Chapter Leader, UiPath MVPx3, Hyper-automation Consultant, First Abu Dhabi Bank
10:20 A UiPath cross-region MEA overview
Ashraf El Zarka, VP and Managing Director MEA, UiPath
10:35: Customer Success Journey
Deepthi Deepak, Head of Intelligent Automation CoE, First Abu Dhabi Bank
11:15 The UiPath approach to GenAI with our three principles: improve accuracy, supercharge productivity, and automate more
Boris Krumrey, Global VP, Automation Innovation, UiPath
12:15 To discover how Marc Ellis leverages tech-driven solutions in recruitment and managed services.
Brendan Lingam, Director of Sales and Business Development, Marc Ellis
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
zkStudyClub - Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex ProofsAlex Pruden
This paper presents Reef, a system for generating publicly verifiable succinct non-interactive zero-knowledge proofs that a committed document matches or does not match a regular expression. We describe applications such as proving the strength of passwords, the provenance of email despite redactions, the validity of oblivious DNS queries, and the existence of mutations in DNA. Reef supports the Perl Compatible Regular Expression syntax, including wildcards, alternation, ranges, capture groups, Kleene star, negations, and lookarounds. Reef introduces a new type of automata, Skipping Alternating Finite Automata (SAFA), that skips irrelevant parts of a document when producing proofs without undermining soundness, and instantiates SAFA with a lookup argument. Our experimental evaluation confirms that Reef can generate proofs for documents with 32M characters; the proofs are small and cheap to verify (under a second).
Paper: https://eprint.iacr.org/2023/1886
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
9. Using Cloud Services
• Amazon Web Services
- EC2 (Instance Store + EBS)
- S3
- CloudFront
- Route53
- Elastic Load Balancing
• Google Apps
• Kontagent
10. System Relations
iframe API Call Callback for
Payment API
Web
HTML
Server
JSON
Flash
Command
AMF Server
AMF : Actionscript Message Format
11. L m1.large
Servers XX
EBS
m2.2xlarge
EBS
ELB ELB
S3
Web L 3 Command L 4 CloudFront
nginx nginx Route 53
Tomcat Tomcat
バッチ L
mongos mongos
バッチ
MySQL
Shard 5 MySQL L memcached L 2
monitor L
MongoDB XX MySQL memcached
EBS munin
mongod
MySQL L nagios
MongoDB XX
MySQL admin L ビルド L
mongod EBS
nginx redmine
MongoDB XX MongoDB XX 3 Tomcat jenkins
mongod mongoc
EBS EBS mongos Maven SVN
EBS
Secondary
15. • Used in Ameba Pico
http://apps.facebook.com/amebapico/
16. • I like MongoDB features !!
- ReplicaSet
- Auto-Sharding
- Can handle complex data structures
- Index, Advanced Queries
- Developed actively
- Quite easy to understand
17. • Fits in Animal Land requirements
- Complex data structures (City s grid
data, user/structure parameters, ...)
- Most processes run sequencially and
doesn t update same data at a time
- Maintenance-less
• Change data structures
dynamically
• Durability, Scalability
18. • Resolve MongoDB s weak points by
other way
- Some data are stored in other DB
• Payments history needs reliability,
so they are stored in MySQL
• Temporary data are stored in
memcached
- Don t think of using transactions
20. Developing Application
• Define data without using transaction
- User data are defined in 1 document
and updated only once in block
User Data
{ facebookId : xxx,
Image
status : { lv : 10, coin : 9999, ... },
layerInfo : 1¦1¦0¦1¦2¦1¦1¦3¦1¦1¦4¦0... ,
structure : {
1¦1 : { id : xxxx, depth : 3, width : 3, aspect : 1, ... }, ...
},
inventory : [ { id : xxx, size : xxx, ... }, ... ],
neighbor : [ { id : xxx, newFlg : false, ... }, ... ],
animal : [ { id : xxx, color : 0, pos : 20¦20 , ... } ],
...
}
21. Developing Application
• Cutdown data size as possible
- City s grid data are stored in 1 field
(Expanded when application uses)
- Data in design phase(500 KB)
layerInfo : {
1¦1 : 0,
1¦2 : 1,
....
}
- Current data(50 KB)
layerInfo : 1¦1¦0¦1¦2¦1¦1¦3¦1¦1¦4¦0...
22. Developing Application
• Careful not to define too many fields
- It took more than 5 sec for find()
when data contained more than
20,000 fields (144x144 City s grid
data)
- Consider data size, and also for the
time to parse BSON
23. Developing Application
• Shard Key is decided in following
policy
- Don t use low-cardinality key
- Recent used data should be on
memory, and data not used should
not be
- Frequently read/write data should be
in each shard in nice balance
24. Developing Application
• Use targeted operation as possible
- Use Shard Key
- Use index for non Shard Key op
Operation Type
db.foo.find({ShardKey : 1}) Targeted
db.foo.find({ShardKey : 1, NonShardKey : 1}) Targeted
db.foo.find({NonShardKey : 1}) Global
db.foo.find() Global
db.foo.insert(<object>) Targeted
db.foo.update({ShardKey : 1}, <object>) Targeted
db.foo.remove({ShardKey : 1})
db.foo.update({NonShardKey : 1}, <object>) Global
db.foo.remove({NonShardKey : 1})
25. Developing Application
• Decrease update frequency
- Store master data in memory
- Queue mechanism in Flash
- User operations are processed in
block (once per 5 sec)
• Server processes sequencially
Processes
User op. Stored in
Sequencially
Queue
Queue
Command
Flash
Server
Send in Block
once per 5 sec
26. Developing Application
• Develop efficiently using O/R Mapper
- Spring Data - MongoDB and
Wrapper classes
@Autowired
protected MongoTemplate mongoTemplate;
public void insert(T entity) {
mongoTemplate.save(entity);
}
- Can use any serializable object
- Maybe easier to deal with than RDB
O/R Mapper
27. Developing Application
• Implements without expecting rollback
- Give up for some inconsistent data
- Careful not to inflict disadvantages
to user
28. Constructing Infrastructure
• Estimate same as other DBs
- Data size/user (50 KB)
- Expected user (DAU 70万)
- Update frequency
- Each servers max connections
- Number of servers, specs, costs
- Consider when to scale servers
according to user growth
29. Constructing Infrastructure
• Performance Verification
- Bandwith (EC2 is about 350Mbps)
- Verify MongoDB (MongoDB 2.0.1、
2Shard with Replica Set、enable
journaling)
• READ/WRITE performance
• Performance during migration
• Performance through Java Driver
- Performance through application
30. Constructing Infrastructure
• Prepare for troubles
- When mongod dies ...
• SECONDARY becomes PRIMARY ?
• Data synchronize when it restart ?
• Safe when SECONDARY dies ?
- When mongoc dies ...
• Nothing happens ?
- Succeed to restore from backup ?
→ no problem
31. Constructing Infrastructure
• ReplicaSet and Shard Construction
- Use large memory size
- Use high speed I/O disk
- Place mongoc independent from
mongod
- Use EBS to raise reliability (run only
as SECONDARY)
• Enable Journaling
• Set oplogsize as 10GB
32. Constructing Infrastructure
• Create index in advance
- Index blocks all operation ...
- Took about 2 min to create index for
200,000 data (each about 50KB)
- Create index during maintanance
time or in background for running
services
33. Constructing Infrastructure
• Connection Pool Tuning
※ connnection pool is for mongos
property description value
connectionsPerHost number of connections 100
threadsAllowedToBlockFor wait threads per
4
ConnectionMultiplier connection
- set the value with nginx worker and
Tomcat thread size in mind
- Careful with Out of Semaphores
errors. Above case would be
100 + (100 * 4) = 500
34. In Operation
• Check chunk balance routinely
- Move chunk manually if needed
• Careful when adding new Collections
- Primary Shard might be overloaded
because new collection data will be
placed there
36. mongod & mongoc died..
• Caused by virtual server host for EC2
instance. Nothing to do with MongoDB
• There was NO impact for service !!
• Recovered just starting mongod and
mongoc processes
38. Online Backup
• Difficult to backup for running services
• Backup while in maintenance mode
• Thinking of doing backup from
SECONDARY as follows, but need
some verification ...
1. set balancer off
2. write lock SECONDARY and backup
3. set balance on
39. Upgrade
• Upgrade is also difficult for the timing
• Need to do following steps
1. Stop Arbiter, upgrade, run
2. Stop SECONDARY, upgrade, run
3. Stop PRIMARY, upgrade, run
40. Adding Shards
• It s possible to add shards later on,
but have to consider it s performance
for balancing
- Pico is adding shards while in
maintenance mode for safety
41. Best Chunksize
• Migration frequently occurs, because
user data was too large and chunksize
was small (default 64MB)
• Need to adjust chunksize according to
it s data size
Maybe nice if you can set the chunksize
for each collections ...
42. Analyzing Data
• Hard to analyze user data, because we
handle the data in 1 document
• Creating index if necessary
- Tested MapReduce, but some
performance problems occured. Not
using it right now
43. Thank you !
Please enjoy Animal Land !!
http://apps.facebook.com/animal-land/