llnl / llnl/UnifyFS

Migrating data between Unifyfs servers

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

Description

### Describe the problem you're observing

In the case of producer-consumer workloads where a subset of producers produce and then another subset of processes on a different set of nodes consume, currently the reading of consumers is bottlenecked by the unifyfs server which holds the data (generally the set of nodes where data was produced).

We can add a migration step between the unifyfs servers to migrate this data closer to the consumers so that they can access data node-locally instead of remote access.

Contributor guide

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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

No files, tests, or entry points are named. Start by tracing how producers place data and how consumers read it across UnifyFS servers, then determine where migration would fit. Done should mean consumer data can be accessed node-locally rather than through the server holding the original data.

Written by the indexing model from the issue text.

Assessment

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

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