ipc | Public domain single header inter process communication | File Utils library

What is the difference between Arrow IPC and Feather?

The official documentation says:

Version 2 (V2), the default version, which is exactly represented as the Arrow IPC file format on disk. V2 files support storing all Arrow data types as well as compression with LZ4 or ZSTD. V2 was first made available in Apache Arrow 0.17.0.

While vaex, a pandas alternative, has two different functions, one for Arrow IPC and one for Feather. polars, another pandas alternative, indicate that Arrow IPC and Feather are the same.

I'm getting used to win32 API shenanigans but it's tiresome, the problem I face this time regards the assignemt of a name of a named pipe, this is what I'm doing:

So i have this nodejs that was originaly used as api to crawl data using puppeteer from a website based on a schedule, now to check if there is a schedule i used a function that link to a model query and check if there are any schedule at the moment. It seems to work and i get the data, but when i was crawling the second article and the next there is always this error UnhandledPromiseRejectionWarning: Error: Request is already handled! and followed by UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). and it seems to take a lot of resource from the cpu and memory. So my question is, is there any blocking in my code or anything that could have done better.

this is my server.js

I am trying to send an HWND with the WM_COPYDATA IPC method. So far when sending a string LPCTSTR it works.

• Electron - 12.0.8
• Platform – macOS 10.15.7

I'm trying to display a file dialog from an Electron renderer process. I thought I could reference the dialog object in the same way I reference ipcRenderer through the contextBridge.

I have create an image for the oracle 19c. I have started my container with below command.

docker run --name oracledb -d -p 1527:1521 -p 5700:5500 -e ORACLE_PWD=password1 -e ORACLE_CHARACTERSET=AL32UTF8 -v /d/docker-code/oracle-data oracle/database:19.3.0-ee

After creation of container, I am able to login in the container. I am able to connect with the below command inside the container.

sqlplus system/password1@172.17.0.2:1527/ORCLCDB

Outside of the container, from the cmd, I can not connect to that oracle instance.

Note: I have already installed oracle on the windows machine at port 1521 which is default port.

listener.ora

prometheus-prometheus-kube-prometheus-prometheus-0 0/2 Terminating 0 4s alertmanager-prometheus-kube-prometheus-alertmanager-0 0/2 Terminating 0 10s

After updating EKS cluster to 1.16 from 1.15 everything works fine except these two pods, they keep on terminating and unable to initialise. Hence, prometheus monitoring does not work. I am getting below errors while describing the pods.

I'm using shared memory with System V IPC. I create segments using keys with the following command:

AFAIK, there exist two methods for IPC over sockets. Unix sockets and TCP/IP sockets.

UNIX domain sockets know that they’re executing on the same system, so they can avoid some checks and operations (like routing); which makes them faster and lighter than IP sockets. They also transfer the packets over the file system, meaning disk access is a natural part of the process (AFAIU, from what using file system means).

IP sockets (especially TCP/IP sockets) are a mechanism allowing communication between processes over the network. In some cases, you can use TCP/IP sockets to talk with processes running on the same computer (by using the loopback interface).

My question is: in the latter case, where does the transfer of packets occur exactly? If they are being passed over the memory, although it seems like there is a logical overhead, IP sockets are actually more performant than UNIX sockets.

Is there something that I am missing? I understand that logically IP sockets introduce an overhead, I want to understand what happens to a message in both cases.