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crazylion lee

Home Assistant - 1 views

home-assistant.io

homeautomation python automation home automation

shared by crazylion lee on 31 Mar 16 - No Cached
  • crazylion lee on 31 Mar 16
     
    "Home Assistant is an open-source home automation platform running on Python 3. Track and control all devices at home and automate control. Installation in less than a minute. "
crazylion lee

Dropzone.js - 0 views

www.dropzonejs.com

javascript upload jquery fileupload drag drop file

shared by crazylion lee on 01 Apr 16 - No Cached
  • crazylion lee on 01 Apr 16
     
    "DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews."
crazylion lee

NATRON - 0 views

natron.fr

compositing opensource compose

shared by crazylion lee on 27 Jun 16 - No Cached
  • crazylion lee on 27 Jun 16
     
    "Free and open-source compositing software, available for MacOS X, Windows and Linux."
crazylion lee

Grafana - Graphite and InfluxDB Dashboard and graph composer - 0 views

grafana.org

graph graphite

shared by crazylion lee on 28 Aug 15 - No Cached
  • crazylion lee on 28 Aug 15
     
    "An open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB."
crazylion lee

BFH ImagePlay - Rapid Prototyping for Image Processing - 0 views

imageplay.io

processing image

shared by crazylion lee on 06 Aug 15 - No Cached
  • crazylion lee on 06 Aug 15
     
    "ImagePlay is a rapid prototyping tool for building and testing image processing algorithms. It comes with a variety of over 70 individual image processors which can be combined into complex process chains. ImagePlay is completely open source and can be built for Windows, Mac and Linux."
crazylion lee

Scrapy | A Fast and Powerful Scraping and Web Crawling Framework - 0 views

scrapy.org

Python Crawler web framework

shared by crazylion lee on 15 Oct 15 - Cached
  • crazylion lee on 15 Oct 15
     
    "An open source and collaborative framework for extracting the data you need from websites. In a fast, simple, yet extensible way."
crazylion lee

Mattermost - 0 views

www.mattermost.org

slack chat opensource

shared by crazylion lee on 15 Oct 15 - No Cached
  • crazylion lee on 15 Oct 15
     
    "Mattermost is an open source, on-prem Slack-alternative"
crazylion lee

Phabricator - 0 views

phabricator.org

PHP facebook codereview

shared by crazylion lee on 31 Oct 14 - No Cached
  • crazylion lee on 31 Oct 14
     
    Phabricator is a collection of open source web applications that help software companies build better software.
crazylion lee

Five Open-Source Slack Alternatives » okTurtles Blog - 0 views

blog.okturtles.com/...open-source-slack-alternatives

slack opensource

shared by crazylion lee on 08 Nov 15 - No Cached
  • crazylion lee on 08 Nov 15
     
    " Slack is a popular team communications application for organizations that offers group chat and direct messaging for mobile, web, and desktop platforms. While Slack offers many benefits to customers, there are also downsides to using the platform, including high subscription fees and the risk of a massive leak of private data if Slack's servers are ever breached (again)."
crazylion lee

Nmap: the Network Mapper - Free Security Scanner - 1 views

nmap.org

security network

shared by crazylion lee on 22 Nov 15 - No Cached
  • crazylion lee on 22 Nov 15
     
    "Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are available for Linux, Windows, and Mac OS X. In addition to the classic command-line Nmap executable, the Nmap suite includes an advanced GUI and results viewer (Zenmap), a flexible data transfer, redirection, and debugging tool (Ncat), a utility for comparing scan results (Ndiff), and a packet generation and response analysis tool (Nping)."
crazylion lee

Apache Geode (incubating) | Home - 0 views

geode.incubator.apache.org

apache in-memory db

shared by crazylion lee on 30 Nov 15 - No Cached
  • crazylion lee on 30 Nov 15
     
    "Geode is an open source, distributed, in-memory database for scale-out applications."
crazylion lee

SQL Tabs - 1 views

www.sqltabs.com

postgresql sql client

shared by crazylion lee on 04 Apr 16 - No Cached
  • crazylion lee on 04 Apr 16
     
    "SQL Tabs is an open source cross platform desktop client for Postgresql"
crazylion lee

Apache Syncope - Apache Syncope - 0 views

syncope.apache.org

Apache management enterprise identity java

shared by crazylion lee on 10 Oct 16 - No Cached
  • crazylion lee on 10 Oct 16
     
    "Apache Syncope is an Open Source system for managing digital identities in enterprise environments, implemented in Java EE technology and released under Apache 2.0 license."
crazylion lee

grpc / grpc.io - 0 views

www.grpc.io

google grpc rpc

shared by crazylion lee on 27 Aug 16 - No Cached
  • crazylion lee on 27 Aug 16
     
    "A high performance, open-source universal RPC framework"
crazylion lee

TagSpaces - Your Hackable File Organizer - 0 views

www.tagspaces.org

tagging file organization

shared by crazylion lee on 19 Oct 16 - No Cached
  • crazylion lee on 19 Oct 16
     
    "TagSpaces is an open source personal data manager. It helps you organize and browse your files on every platform."
crazylion lee

Total.js Messenger - Total.js - 0 views

www.totaljs.com/messenger

nodejs slack chat

shared by crazylion lee on 14 May 17 - No Cached
  • crazylion lee on 14 May 17
     
    " Total.js Messenger is a small alternative to Slack. Our solution is small, fast and open-source web application which you can customize it by your needs. Try our great solution as a communication channel in your company or sell it for your customers."
張 旭

Open source load testing tool review 2020 - 0 views

k6.io/...open-source-load-testing-tools

performance test

shared by 張 旭 on 11 Mar 21 - No Cached
  • Hey is a simple tool, written in Go, with good performance and the most common features you'll need to run simple static URL tests.
  • Hey supports HTTP/2, which neither Wrk nor Apachebench does
  • Apachebench is very fast, so often you will not need more than one CPU core to generate enough traffic
  • ...16 more annotations...
  • Hey has rate limiting, which can be used to run fixed-rate tests.
  • Vegeta was designed to be run on the command line; it reads from stdin a list of HTTP transactions to generate, and sends results in binary format to stdout,
  • Vegeta is a really strong tool that caters to people who want a tool to test simple, static URLs (perhaps API end points) but also want a bit more functionality.
  • Vegeta can even be used as a Golang library/package if you want to create your own load testing tool.
  • Wrk is so damn fast
  • being fast and measuring correctly is about all that Wrk does
  • k6 is scriptable in plain Javascript
  • k6 is average or better. In some categories (documentation, scripting API, command line UX) it is outstanding.
  • Jmeter is a huge beast compared to most other tools.
  • Siege is a simple tool, similar to e.g. Apachebench in that it has no scripting and is primarily used when you want to hit a single, static URL repeatedly.
  • A good way of testing the testing tools is to not test them on your code, but on some third-party thing that is sure to be very high-performing.
  • use a tool like e.g. top to keep track of Nginx CPU usage while testing. If you see just one process, and see it using close to 100% CPU, it means you could be CPU-bound on the target side.
  • If you see multiple Nginx processes but only one is using a lot of CPU, it means your load testing tool is only talking to that particular worker process.
  • Network delay is also important to take into account as it sets an upper limit on the number of requests per second you can push through.
  • If, say, the Nginx default page requires a transfer of 250 bytes to load, it means that if the servers are connected via a 100 Mbit/s link, the theoretical max RPS rate would be around 100,000,000 divided by 8 (bits per byte) divided by 250 => 100M/2000 = 50,000 RPS. Though that is a very optimistic calculation - protocol overhead will make the actual number a lot lower so in the case above I would start to get worried bandwidth was an issue if I saw I could push through max 30,000 RPS, or something like that.
  • Wrk managed to push through over 50,000 RPS and that made 8 Nginx workers on the target system consume about 600% CPU.
張 旭

LXC vs Docker: Why Docker is Better | UpGuard - 0 views

www.upguard.com/...docker-vs-lxc

docker container devops

shared by 張 旭 on 28 Jun 21 - No Cached
  • LXC (LinuX Containers) is a OS-level virtualization technology that allows creation and running of multiple isolated Linux virtual environments (VE) on a single control host.
  • Docker, previously called dotCloud, was started as a side project and only open-sourced in 2013. It is really an extension of LXC’s capabilities.
  • run processes in isolation.
  • ...35 more annotations...
  • Docker is developed in the Go language and utilizes LXC, cgroups, and the Linux kernel itself. Since it’s based on LXC, a Docker container does not include a separate operating system; instead it relies on the operating system’s own functionality as provided by the underlying infrastructure.
  • Docker acts as a portable container engine, packaging the application and all its dependencies in a virtual container that can run on any Linux server.
  • a VE there is no preloaded emulation manager software as in a VM.
  • In a VE, the application (or OS) is spawned in a container and runs with no added overhead, except for a usually minuscule VE initialization process.
  • LXC will boast bare metal performance characteristics because it only packages the needed applications.
  • the OS is also just another application that can be packaged too.
  • a VM, which packages the entire OS and machine setup, including hard drive, virtual processors and network interfaces. The resulting bloated mass usually takes a long time to boot and consumes a lot of CPU and RAM.
  • don’t offer some other neat features of VM’s such as IaaS setups and live migration.
  • LXC as supercharged chroot on Linux. It allows you to not only isolate applications, but even the entire OS.
  • Libvirt, which allows the use of containers through the LXC driver by connecting to 'lxc:///'.
  • 'LXC', is not compatible with libvirt, but is more flexible with more userspace tools.
  • Portable deployment across machines
  • Versioning: Docker includes git-like capabilities for tracking successive versions of a container
  • Component reuse: Docker allows building or stacking of already created packages.
  • Shared libraries: There is already a public registry (http://index.docker.io/ ) where thousands have already uploaded the useful containers they have created.
  • Docker taking the devops world by storm since its launch back in 2013.
  • LXC, while older, has not been as popular with developers as Docker has proven to be
  • LXC having a focus on sys admins that’s similar to what solutions like the Solaris operating system, with its Solaris Zones, Linux OpenVZ, and FreeBSD, with its BSD Jails virtualization system
  • it started out being built on top of LXC, Docker later moved beyond LXC containers to its own execution environment called libcontainer.
  • Unlike LXC, which launches an operating system init for each container, Docker provides one OS environment, supplied by the Docker Engine
  • LXC tooling sticks close to what system administrators running bare metal servers are used to
  • The LXC command line provides essential commands that cover routine management tasks, including the creation, launch, and deletion of LXC containers.
  • Docker containers aim to be even lighter weight in order to support the fast, highly scalable, deployment of applications with microservice architecture.
  • With backing from Canonical, LXC and LXD have an ecosystem tightly bound to the rest of the open source Linux community.
  • Docker Swarm
  • Docker Trusted Registry
  • Docker Compose
  • Docker Machine
  • Kubernetes facilitates the deployment of containers in your data center by representing a cluster of servers as a single system.
  • Swarm is Docker’s clustering, scheduling and orchestration tool for managing a cluster of Docker hosts. 
  • rkt is a security minded container engine that uses KVM for VM-based isolation and packs other enhanced security features. 
  • Apache Mesos can run different kinds of distributed jobs, including containers. 
  • Elastic Container Service is Amazon’s service for running and orchestrating containerized applications on AWS
  • LXC offers the advantages of a VE on Linux, mainly the ability to isolate your own private workloads from one another. It is a cheaper and faster solution to implement than a VM, but doing so requires a bit of extra learning and expertise.
  • Docker is a significant improvement of LXC’s capabilities.
crazylion lee

GitHub - pyroscope-io/pyroscope: - 0 views

github.com/...pyroscope

apm ruby golang python node

shared by crazylion lee on 23 Feb 21 - No Cached
  • crazylion lee on 23 Feb 21
     
    "Pyroscope is an open source continuous profiling platform. It will help you: "
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