Open file o_direct

Peter Eisentraut Peter Eisentraut 1, 15 15 silver badges 11 11 bronze badges. It has lots to do with performance. You say it has a lot to do with performance, yet, you provide an example where it is used either to decrease latency or order writes.

But I do agree that it affects performance. Fair point about fairness. Can you provide more references explaining when it is unfair? Relating to what Juliano has already said. Grzegorz Wierzowiecki Grzegorz Wierzowiecki The critical factor with the code in the question is write performance. The problem is that writing out the buffer fills the Linux caches first, which the kernel then has to dump when it runs out of memory.

This is a waste of effort, the output in this case should be minimally buffered on the way to disk. Marcelo Pacheco Marcelo Pacheco 3 3 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.

Linked 2. Related 4. Hot Network Questions. You have several ways to open Command Prompt in Windows Then type cmd in the Run box. Alternatively, you can also click Start or Search box in Windows 10, and type cmd or command prompt. Right-click the Command Prompt app in the list and choose Run as administrator. Normally you have two ways to open a file using cmd. One is to move the folder that the file is in, the other is to open the files directly in Command Prompt.

How to stop Windows 11 update? This post provides 5 solutions to let you disable automatic updates on Windows Are there alternatives? As for Linux, what will your tool do that hdparm doesn't? This means that it presumably can;'t be supported by Cygwin either, as Cygwin needs to use the underlying Windows OS. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Portability of open Ask Question. Asked 12 years, 7 months ago. Active 7 years, 10 months ago. Viewed 4k times. Improve this question.