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Utah Networxs Consultoria e Treinamento

The document provides an overview of the FreeBSD operating system boot process and file hierarchy. It discusses how the boot0 and boot1 programs initialize the system and load the boot2 program. Boot2 then loads the loader, which uses a bootinfo structure to pass information to the kernel and load it into memory to start the operating system. The document also describes the standard FreeBSD file hierarchy and the purpose of the main directories like /bin, /sbin, /etc, /usr, /var, and /boot.

Linux Survival Kit for Proof of Concept & Proof of Technology

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HIGH AVAILABLE CLUSTER IN WEB SERVER WITH HEARTBEAT + DRBD + OCFS2

Actually any people and employers get high available in your applications, maintain ours environment always available not is easy task. In Open Source World exist tools that maje it possible. This appresentation is a module course UTAH NETWORXS about Hight Available and Performance Course. Utah Networxs is business school in Sao Paulo Brazil Work a Linux System for more than 17 years. Maked to Fabio Pires Directory Utah Networxs and Linux Specialist focusing Clusters and HA services.

LinuxCon_2013_NA_Eckermann_Filesystems_btrfs.pdf

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The document discusses different types of local Linux filesystems and their features. It focuses on the btrfs filesystem, describing its main features like copy-on-write, snapshots, and subvolumes. It recommends using btrfs or xfs for new installations where snapshots are needed, and converting existing filesystems to btrfs. It demonstrates how btrfs and its snapshot tool snapper can be used for system administration tasks and on desktops.

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This document summarizes the Texas Advanced Computing Center's (TACC) experience using DDN's Infinite Memory Engine (IME) as a burst buffer for three HPC applications on the Stampede supercomputer. Initial testing showed I/O bottlenecks that were addressed by improving the InfiniBand topology. Performance testing found the IME provided significant acceleration over the Lustre parallel file system, with speedups ranging from 3.7x to 28x for the HACC cosmology code, 6.8x to 22.3x for the S3D combustion code, and 6.2x to 10.1x for the MADBench mini-app. The IME demonstrated its ability to scale and improve

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This document provides a collection of Unix/Linux commands useful for system administration and advanced users. It covers topics such as system information, processes, file systems, networks, encryption, version control, software installation and more. Each section provides concise explanations of commands within that topic area. The reader is expected to have a working knowledge of Unix-like systems.

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This document summarizes Marian Marinov's testing and experience with various distributed filesystems including CephFS, GlusterFS, MooseFS, OrangeFS, and BeeGFS. Some key findings are: - CephFS requires significant resources but lacks redundancy for small clusters. GlusterFS offers redundancy but can have high CPU usage. - MooseFS and OrangeFS were easy to setup but MooseFS offered better reliability and stats. - Performance testing found MooseFS and NFS+Ceph to have better small file creation times than GlusterFS and OrangeFS. Network latency was identified as a major factor impacting distributed filesystem performance. - Tuning efforts focused on NFS

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While probably the most prominent, Docker is not the only tool for building and managing containers. Originally meant to be a "chroot on steroids" to help debug systemd, systemd-nspawn provides a fairly uncomplicated approach to work with containers. Being part of systemd, it is available on most recent distributions out-of-the-box and requires no additional dependencies. This deck will introduce a few concepts involved in containers and will guide you through the steps of building a container from scratch. The payload will be a simple service, which will be automatically activated by systemd when the first request arrives.

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This document discusses Exadata and OLTP performance. It summarizes the results of running the Silly Little Oracle Benchmark (SLOB) on different Exadata and non-Exadata systems to evaluate logical and physical I/O performance at different concurrency levels. The tests show that Exadata's flash cache allows it to maintain much lower and more consistent physical I/O response times as concurrency increases compared to systems without flash. Logical I/O performance depends more on CPU and memory configuration.

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bcc/BPF tools - Strategy, current tools, future challenges

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Brendan Gregg discusses the current state and future potential of BPF and BCC tools for observability in Linux. He outlines 18 areas where BPF support has progressed and 16 areas still needing work. Gregg also discusses challenges like dynamic tracing stability, overhead, ease of coding, and developing visualizations. He proposes finishing ports of his old DTrace tools and links to resources on BPF, BCC, and flame graphs.

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Writing a new driver framework in Linux is hard. There are many pitfalls along the way; this talk hopes to point out some of those pitfalls and hard lessons learned through examples, advice and humorous anecdotes in the hope that it will aid those adventurous enough to take on the task of writing a new driver framework. The scope of the talk includes internal framework design as well as external API design exposed to drivers and consumers of the framework. This presentation pulls directly from the Michael Turquette’s experience authoring the Common Clock Framework and maintaining that code for the last four years. Additionally Mike has solicited tips and advice from other subsystem maintainers, for a well-rounded overview. Be prepared to learn some winning design patterns and hear some embarrassing stories of framework design gone wrong. Mike Turquette, BayLibre

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The document summarizes key aspects of the C compilation model and process concepts in operating systems. It discusses that the C compilation model involves preprocessing, compilation, assembly, and linking. It also explains that a process is a program in execution with a unique process ID, that processes are created through forking, and that signals allow processes to communicate termination status. Process attributes like user IDs, group IDs, and process groups are also covered.

Kernel Recipes 2017: Performance Analysis with BPF

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Talk by Brendan Gregg at Kernel Recipes 2017 (Paris): "The in-kernel Berkeley Packet Filter (BPF) has been enhanced in recent kernels to do much more than just filtering packets. It can now run user-defined programs on events, such as on tracepoints, kprobes, uprobes, and perf_events, allowing advanced performance analysis tools to be created. These can be used in production as the BPF virtual machine is sandboxed and will reject unsafe code, and are already in use at Netflix. Beginning with the bpf() syscall in 3.18, enhancements have been added in many kernel versions since, with major features for BPF analysis landing in Linux 4.1, 4.4, 4.7, and 4.9. Specific capabilities these provide include custom in-kernel summaries of metrics, custom latency measurements, and frequency counting kernel and user stack traces on events. One interesting case involves saving stack traces on wake up events, and associating them with the blocked stack trace: so that we can see the blocking stack trace and the waker together, merged in kernel by a BPF program (that particular example is in the kernel as samples/bpf/offwaketime). This talk will discuss the new BPF capabilities for performance analysis and debugging, and demonstrate the new open source tools that have been developed to use it, many of which are in the Linux Foundation iovisor bcc (BPF Compiler Collection) project. These include tools to analyze the CPU scheduler, TCP performance, file system performance, block I/O, and more."

Presentatie Cisco NetApp Proact over FlexPod

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The document discusses the FlexPod solution from Cisco, NetApp, and Proact. FlexPod provides a converged infrastructure that combines Cisco UCS servers and networking with NetApp storage. It offers scalability, efficiency, and unified management. Proact partners with Cisco and NetApp to provide FlexPod solutions that are validated, secure, and easily managed. FlexPods allow customers to reduce costs and complexity while improving agility over traditional siloed data center architectures.

Introduction to Oracle Database

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Oracle Database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. Oracle Database was started in 1977 as Software Development Laboratories by Larry Ellison and others. Over time, Oracle released several major versions that added new functionality, such as Oracle 12c which was designed for cloud computing. A database server is the key to solving problems of information management by allowing storage, retrieval, and manipulation of data.

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An Oracle database instance consists of background processes that control one or more databases. A schema is a set of database objects owned by a user that apply to a specific application. Tables store data in rows and columns, and indexes and constraints help maintain data integrity and improve query performance. Database administrators perform tasks like installing and upgrading databases, managing storage, security, backups and high availability.

React JS and why it's awesome

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This document provides an overview of React, including initial reactions to it, fundamental concepts like components and one-way data flow, and how the virtual DOM works. Some key points covered include: - Initial reactions to React were mixed, with some finding it "ugly" but others seeing benefits like separation of concerns with components. - Everything in React is a component, with data flowing in one direction from parent to child via props. State is mutable within a component. - By using a virtual DOM, React can efficiently update the real DOM by only making necessary changes, keeping the interface fast and pure.

Presentation on Communication

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Communication is an integral part of our life. We use our communication skills while reading, writing, speaking, and listening. Almost the whole day is spent in communicating with others. Communications with others is critical. None of our day to day activities whether personal or professional can be completed without communicating. We keep communicating may be verbally or through writing to our friends, family members or professional colleagues. However, has it ever happened with you that someone to whom you were communicating asked you a question, “What do you mean” or “What you want me to do”? Sometimes you must have found yourself saying, “But I mean to say”, or someone who is talking to you says, “No, No, what I wanted to say”. Have you ever found yourself saying to your superior about your subordinate, “Sir, I told him several times, but I don’t know why he does not listen? Or “I don’t know why he does not do it”? All these questions and statement point out only one thing and that is, “Communication is not as easy as we think it is”. It is very rightly said, “Communication is done by the listener”, as whatever the other person makes out of the message only that can be considered as the message communicated by the speaker. The book, ‘Why My Horse Doesn’t Listen’ will help you understand all those situations that affect your performance while communicating with others.

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23 Tips From Comedians to Be Funnier in Your Next Presentation (via the book ...

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As they clock up the 10,000 hours that Malcolm Gladwell says make a master, comedians learn a lot the hard way. Here are their top tips so you don't have to. 1. Use the Rule of 3 2. Draw Upon Your Real-Life Experiences 3. Identify the Key Part and Get There Fast 4. Find the Funny in Pain Points 5. Think Fails and Firsts 6. Listen and repeat. 7. Think Fun Over Funny 8. Screen Your Jokes 9. Tell a Joke 10. Like Jerry Seinfeld Does, Use Inherently Funny Words 11. Paint a Picture for Others to See 12. Do Something Memorable 13. Jokes are: 1, 2 … 4! 14. Use the Art of Misdirection 15. Put the Word the Joke Hinges on at the End of the Sentence 16. Use Tension 17. Avoid Ever Going Blank Onstage 18. Use Your Hands 19. Use Metaphors and Analogies Combined With Hyperbole (Exaggeration) 20. If the Energy Is Down, Bring It Up 21. Trust Your Funny Bits 22. Proper Planning Prevents Poor Performance And last but not least, from Irish comedian Dylan Moran: 23. Don’t Rely on Potential “Don’t do it! Stay away from your potential,” Moran says. “You’ll mess it up. It’s potential; leave it. Anyway, it’s like your bank balance–you always have a lot less than you think.” As Mark Twain said, “The human race has only one really effective weapon and that is laughter.” That type of arms race may be one worth all our time. Most presentations are really boring. With applications of these tips, yours will not be. These tips are taken from the bestselling book Do You Talk Funny and Hacking Public Speaking. http://hackingpublicspeaking.com/

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Teradata vs-exadata

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This document compares Oracle Exadata and Teradata architectures. It summarizes that Exadata uses a two-tier architecture with shared memory and disk, while Teradata uses a shared-nothing architecture. It notes several advantages of Teradata including unconditional parallelism, linear scalability, and more automatic workload management compared to Exadata which requires more manual workload separation and resource tuning. The document also discusses higher support costs and a steeper learning curve for Exadata compared to Teradata.

effective communication skills ppt

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The document appears to be a presentation on effective communication given by a group of students. It includes sections on the introduction to communication, what is effective communication, the 7 C's of communication, barriers to effective communication, listening, and techniques for effective listening. The presentation provides definitions and explanations of key concepts related to effective communication and emphasizes the importance of listening, clarity, and overcoming barriers.

Netezza vs Teradata vs Exadata

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This document compares Netezza, Teradata, and Exadata databases across several criteria such as architecture, scalability, reliability, performance, compatibility, affordability, and manageability. Some key highlights are that Netezza uses an asymmetric massively parallel processing architecture while Teradata uses a true MPP architecture. Teradata and Exadata can scale storage and memory linearly while Netezza has fixed hardware. All three databases provide high availability but Exadata has redundancy at every layer.

COMMUNICATION POWERPOINT

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ReadySetPresent (Communication PowerPoint Presentation Content): 100+ PowerPoint presentation content slides. The foundation of all skills remains in effective communication in today's professional world. Communication PowerPoint Presentation Content slides include topics such as: Exploring the critical elements of good communication, different methods of communication, 10 slides on keys to effective listening, 6 slides on listening techniques, 10 slides on improving your listening, asking vs. telling, 10 slides on barriers and gateways to communication, 20 slides on effective business communication, why attending is important, responding to content, posturing and observing and feedback, 20+ slides on nonverbal communication, including eye contact, language barriers, how to's and more!

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This document discusses hardware trends and challenges for building exascale computers. It describes the evolution of processor/node architectures including multi-core and many-core designs. Reaching exascale performance will require addressing power consumption, concurrency, scalability, and fault tolerance issues. Evolutionary paths using commodity processors are unlikely to succeed, while aggressive approaches using clean-sheet designs for low-power customized chips may be needed to achieve exascale performance by 2018. International efforts are underway to develop exascale systems, but overcoming technical challenges to efficiently utilize extreme parallelism remains difficult.

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This document discusses input/output (I/O) systems and performance. It begins by explaining that I/O devices allow computers to communicate with the outside world through input and output. While I/O performance affects overall system speed, I/O is much slower than CPU and memory. Common I/O devices include hard drives, networks, keyboards and displays. The document then discusses how these devices connect to the computer system and estimates their data transfer speeds.

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