click
Seastar
click | Seastar | |
---|---|---|
4 | 25 | |
726 | 8,018 | |
- | 0.8% | |
4.2 | 9.7 | |
almost 2 years ago | 7 days ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
click
-
Unikraft is a fast, secure and open-source Unikernel Development Kit
It's possible to create an IPSec + firewall based on the Click Modular Router[0] and run this on top of Unikraft[1].
[0]: https://github.com/kohler/click/wiki/IPsecEncap (and other IPSec* elements)
[1]: https://github.com/unikraft/app-click
It could make for an interesting tutorial with a full Click-based IPSec router though! :)
-
Ask HN: How are you using unikernels?
Many unikernel projects were ahead of their time. For example ClickOS [0] is ~7 years old but all its ideas still sound innovative. Someone could build an entire business on top of network function virtualization, using unikernels as an efficient sandboxing mechanism.
I’m not sure why unikernels have not caught on widely. I suspect their time has yet to come for some applications, but at least for NFV and sandboxing, I would bet on solutions using eBPF or XDP with WASM for sandboxing.
[0] https://github.com/kohler/click
-
Signed Char Lotte
Source: https://github.com/kohler/click/blob/6fa978f0188bd0b8a266f65...
Context: This is the source code of the Click Modular Router, a system for implementing packet processing logic with a graph-like DSL. Both primitives, and certain complex logic, are implemented in C++; however, as this has to be able to run as a Linux kernel module, it can't use the C++ standard library, and has its own stdlib.
- Want to borrow that e-book from the library? Sorry, Amazon won’t let you. - Its monopoly is stopping public libraries from lending e-books and audiobooks from Mindy Kaling, Dean Koontz, Dr. Ruth Westheimer, Trevor Noah, Andy Weir, Michael Pollan and a whole lot more
Seastar
-
I want to share my latest hobby project, dbeel: A distributed thread-per-core nosql db written in rust
I used glommio as the async executor (instead of something like tokio), and it is wonderful. For people wondering whether it's "good enough" or to use C++ and seastar (as I have thought about a lot before starting this project), take the leap of faith, it's fast - both in terms of run time and to code.
-
How much reason is there to be multi-threaded in the k8s environment
b) It's proven now e.g Seastar, Glommio that the fastest way to run a multi-threaded application is to have one instance with one thread pinned per CPU core. Then to have fibers/lightweight threads on top handling all of the asynchronous code. Your approach of lots of instances is the slowest so there will be a ton of unnecessary thread context-switching.
-
Are You Sure You Want to Use MMAP in Your Database Management System?
The most common example is DPDK [1]. It's a framework for building bespoke networking stacks that are usable from userspace, without involving the kernel.
You'll find DPDK mentioned a lot in the networking/HPC/data center literature. An example of a backend framework that uses DPDK is the seastar framework [2]. Also, I recently stumbled upon a paper for efficient RPC networks in data centers [3].
If you want to learn more, the p99 conference by ScyllaDB has tons of speakers talking about some interesting challenges.
[1] https://www.dpdk.org/.
[2] https://github.com/scylladb/seastar
[3] https://github.com/erpc-io/eRPC
-
Why does Actix-web's handler not require Send?
I assume Tokio itself, see e.g monoio or glommio, but also Seastar for C++.
-
What is DPDK library in C and how to learn it?
https://core.dpdk.org/supported/ lists supported nics. You're best just reading material from the dpdk website for figuring out roughly what it is. It is used for a lot of different goals. For most web C++ stuff it's mainly used because you can avoid round trips of data passing through the kernel and can reference network data without tons of copying. For an example check out the SeaStar framework, https://seastar.io/, which is under the hood of ScyllaDB.
-
How Numberly Replaced Kafka with a Rust-Based ScyllaDB Shard-Aware Application
As this is a Kafka sub, this may be a good opportunity to mention that Redpanda is based on the same framework (seastar) as Scylla. The idea of sharding work to CPU cores turns out to apply very well to the Kafka data model, too!
-
What are some C++ projects with high quality code that I can read through?
Seastar which is a thread per core runtime written by the Scylla devs thats used in both Redpanda and Scylla as the underlying runtime. https://github.com/scylladb/seastar
-
Abstraction Is Expensive
ScyllaDB is, ironically, maybe one of the worst examples the author could have come up with for "abstraction" in the article.
If folks aren't familiar with their work/internal tech, go check out some of their repos like Seastar. They have some of the most talented systems programmers on the planet writing thin veneers over kernel and hardware API's to squeeze every ounce out of performance.
https://github.com/scylladb/seastar
I know it's beside the point, but I just had to share because I thought that was funny
-
Modern JVM Multithreading • Paweł Jurczenko • Devoxx Poland 2021
I’ve seen frameworks for c++ (https://seastar.io/) and rust (https://github.com/actix/actix) which support what you’re describing out of the box.
-
Who is using C++ for web development?
If you're interested in scaling and asynchronous programming in c++ I highly recommend you investigate the SeaStar application framework. You wouldn't build a web service with SeaStar, rather you would build the infrastructure that you would use to build the web service on top of. https://github.com/scylladb/seastar
What are some alternatives?
unikraft - A next-generation cloud native kernel designed to unlock best-in-class performance, security primitives and efficiency savings.
Folly - An open-source C++ library developed and used at Facebook.
nanos - A kernel designed to run one and only one application in a virtualized environment
glommio - Glommio is a thread-per-core crate that makes writing highly parallel asynchronous applications in a thread-per-core architecture easier for rustaceans.
docs - The front page and documentation for the Unikraft Open-Source Project.
Boost.Asio - Asio C++ Library
pykraft - Python library for configuring and building unikernels
Boost - Super-project for modularized Boost
app-click - Click Modular Router on Unikraft
ffead-cpp - Framework for Enterprise Application Development in c++, HTTP1/HTTP2/HTTP3 compliant, Supports multiple server backends
hermitux - A binary-compatible unikernel
Qt - Qt Base (Core, Gui, Widgets, Network, ...)