llnl / llnl/UnifyFS

Add wrappers for aio functions

Open
#225 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
C
Stars
122
Forks
34
PR merge metrics
No merged PRs in 30d

Description

We have a wrapper for lio_listio(), but its implementation does not handle all I/O ops (read ops, but not write ops), nor does it support the user providing a list of ops that might mix across unifycr and system files. Additionally, we likely need wrappers for other aio functions, and we should consider how to make the implementations actually be asynchronous, e.g., start the read/write op but not block on it to complete.

In short, we need to spend some time considering aio wrappers. Or we could opt to decide to not support async I/O operations, in which case, we should probably drop our lio_listio wrapper.

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the existing lio_listio() wrapper and how it handles read operations. Compare the needs for write operations and lists mixing UnifyFS and system files, then determine whether the wrappers should provide genuinely asynchronous behavior or be removed. Done means a decided scope for aio support and corresponding implementation direction.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
operating-systems
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.