I am looking for the most efficient way to do asynchronous file I/O on linux. The POSIX glibc implementation uses threads in userland. The native aio kernel api only works with unbuffered operat...

Preconditions: python 3.8 aioredis==1.3.0 Sometimes errors below appear in production in sentry: Task was destroyed but it is pending! task: <Task pending name='Task-16349' coro=<RedisConnec...

Event-driven and asynchronous are often used as synonyms. Are there any differences between the two? Also, what is the difference between epoll and aio? How do they fit together? Lastly, I've rea...

Why Linux Kernel AIO does not support async 'open' system call? Because 'open' can block on filesystem for long time, cant it?

I'm trying to install MySQL 5.6.14 on Ubuntu 12.04 Desktop: $ scripts/mysql_install_db --no-defaults --force \ --explicit_defaults_for_timestamp --datadir=/tmp/data And I'm getting: Installing...

I am facing an error with the library AIOKafka in Python (versions at the end). Basically, I am receiving a failed heartbeat message and then the commit of the offsets cannot be performed. This is ...

I am writing a library that uses the Linux asynchronous I/O system calls, and would like to know why the io_submit function is exhibiting poor scaling on the ext4 file system. If possible, what can...

System.IO.File in .NET and .NET Core has a family of Read...Async() methods, all of which return either Task<byte[]> or Task<string> (Task<T> is the .NET's equivalent of Java's Fu...

The semantics of Linux's Asynchronous file IO (AIO) is well described in the man page of io_setup(2), io_submit(2) and io_getevents(2). However, without diving in the block IO subsystem, the opera...

I'm using the Linux kernel AIO through libaio, and I have to submit the next reading operation before the previous one was completed. The problem is that io_submit() blocks for some time and, as I ...

The io_getevents notification mechanism looks quite capable at first glance, so I would like something I could use with it. I just couldn't find anything yet. On Windows, it's easy: There is only T...

While working on a project using the the NIO.2 AIO features I looked in the "old" NIO selector implementation and saw that on windows the default select-function is used which does not scale at all...

I am looking for advice on how to get efficient and high performance asynchronous IO working for my application that runs on Ubuntu Linux 14.04. My app processes transactions and creates a file o...

According to the documentation on aio_read/write, there are basically 2 ways that the AIO library can inform your application that an async file I/O operation has completed. Either 1) you can use a...

With kernel AIO and O_DIRECT|O_SYNC, there is no copying into kernel buffers and it is possible to get fine grained notification when data is actually flushed to disk. However, it requires data to ...

I am writing a C program to read data from an SSD drive by reading directly from the raw block device file. I am trying the Linux AIO (I am talking about the Linux AIO API, i.e. the functions prov...

There are pages scattered around the web that describe POSIX AIO facilities in varying amounts of detail. None of them are terribly recent. It's not clear what, exactly, they're describing. For exa...

I am reading this tutorial on asynchronous disk file I/O, however it doesn't make things clear, it actually makes me more confused. There are two different async. I/O models according to the tutori...

Since writes are immediate anyway (copy to kernel buffer and return), what's the advantage of using io_submit for writes? In fact, it (aio/io_submit) seems worse since you have to allocate the wri...

I want to have async disk read in my program. There are many HDD on server and if one hdd is slow, program is blocking. I want to make calls async. If I call: open(path, O_NONBLOCK | O_RDONLY | ...

How can you combine AIO and epoll together in a single event loop? Google finds lots of talk from 2002 and 2003 about unifying them, but its unclear if anything happened, or if it's possible. Has...

What I seem to understand: POSIX AIO APIs are prototyped in <aio.h> and you link your program with librt(-lrt), while the libaio APIs in <libaio.h> and your program is linked with liba...

For some time now I have been googling a lot to get to know about the various ways to acheive asynchronous programming/behavior on nix machines and ( as known earlier to me ) got confirmed on the f...

According to this tutorial asynchronous disk file io can easily be achieved using AIO on linux, at least from a programming/api point-of-view. But before and after this tutorial I had read a lot of...

A Server which will run forever and processes requests needs an asynchronous part of code in it which will execute some database queries and update only when there are any new changes to it. The se...