amzn-drivers
Redis
amzn-drivers | Redis | |
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4 | 318 | |
441 | 64,893 | |
0.7% | 1.0% | |
9.1 | 9.7 | |
17 days ago | 3 days ago | |
C | C | |
- | GNU General Public License v3.0 or later |
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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.
amzn-drivers
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Looking for programmer volunteers who want to contribute/learn about low level C++, Linux, Networking, high frequency trading.
Amazon (AWS) cloud EC2 instance specific role (Kernel and User space networking, linux OS related). Amazon has it's own network card with it's own linux driver (open source), for user space they use DPDK (open source). https://github.com/amzn/amzn-drivers I've measured the time between calling tcp send in software, and packet leaving the NIC (network card), it is around ~50 microseconds latency, aws also stated in a paper it is around that number. Goals:- Figure out the way to build from source code and load the kernel.- Reduce latency
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FreeBSD optimizations used by Netflix to serve video at 800Gb/s [pdf]
It means, for example, writing a FreeBSD kernel driver for Elastic Network Adapter (ENA). Both Linux kernel driver and FreeBSD kernel driver is available at https://github.com/amzn/amzn-drivers
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Dragonflydb – A modern replacement for Redis and Memcached
Of course, there are.
I was mostly running on AWS. In terms of hardware, for small packets loadtests most systems are constrained on throughput, i.e. number of packets per second. Some systems saturate on interrupts reaching 100% CPU on all cores and some can not even saturate the CPU and you will see that CPU is at 60% but you can not go beyond some limit. Best systems networkwise are c6gn family types. They are also better than other cloud provide. btw, you mentioned hypervisors... About 8 months ago I opened a bug on AWS Graviton team https://github.com/amzn/amzn-drivers/issues/195 - about performance issue they had on their instances at high throughput. Recently they issued the fix. I suspect it was in their hypervisor.
In terms of my software I found many performance bugs at those speeds. For example, using a default allocator is a big no. I use mimalloc for uncontended allocations. In general, you can not use mutexes and spinlocks at those speeds. Those will just cripple the system. Sometimes it can be very annoying since you can not rely on a 3rd party library without carefully analyzing its design. For example, I could not use openmetrics c++ library because it was not performant enough. Even to implement a simple counter, say to gather statistics for INFO command becomes an interesting engineering problem:
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Ask HN: Anybody enabled IOMMU on AWS metal servers?
https://doc.dpdk.org/guides/nics/ena.html
and:
https://github.com/amzn/amzn-drivers/tree/master/userspace/dpdk/enav2-vfio-patch
Enabling IOMMU on i3 or c5 metal instances is as easy as adding "iommu=1 intel_iommu=on" to /etc/default/grub followed by update-grub, reboot.
I can't get this to work. Everything I update grub and reboot I cannot re-connected via ssh. Also EC2 console fails to get good status.
My config:
Ubuntu 20.04 stock AWS AMI x86 64-bit
Redis
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Valkey Is Rapidly Overtaking Redis
One of the challenges Redis labs here have is that there's very little reason for their userbase to stay loyal to them.
antirez retired from Redis development a few years ago.
From https://github.com/redis/redis/graphs/contributors it looks like activity since he left has been mostly from people who didn't overlap with him much.
Redis Labs have not shown themselves to be outstanding stewards of the project as far as I can tell. Why shouldn't people support the fork?
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Handling Multiple requests with Redis and Bullmq
Redis
- Redis is not "open core" (2021)
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Software Engineering Workflow
Redis - real time data storage with different data structures in a cache
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Redict 7.3.0, a copyleft fork of Redis, is now available
[0] https://github.com/redis/redis/blob/unstable/CONTRIBUTING.md
- It has been ten days since the last commit was pushed to Redis
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Containerize your multi-services app with docker compose
Cache: a Redis cache
- Fix Redis Drama
- Redis changes license from BSD-3 to dual RSALv2+SSPLv1
- Change license from BSD-3 to dual RSALv2+SSPLv1
What are some alternatives?
dragonfly - A modern replacement for Redis and Memcached
Redis - 🚀 A robust, performance-focused, and full-featured Redis client for Node.js.
neon - Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, branching, and bottomless storage.
LevelDB - LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.
cachegrand - cachegrand - a modern data ingestion, processing and serving platform built for today's hardware
RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins
helio - A modern framework for backend development based on io_uring Linux interface
Polly - Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
midi-redis - A toy memory store with great performance
celery - Distributed Task Queue (development branch)
webdis - A Redis HTTP interface with JSON output
Riak - Riak is a decentralized datastore from Basho Technologies.