Justin James / Daniel Moore

(Applications Engineering)

iRODS Consortium

June 8-11, 2021

iRODS User Group Meeting 2021

Virtual Event

Parallel Transfer Between

Python Client and S3 Storage

Parallel Transfer Between

Python Client and S3 Storage

Multiple  Connections to/from S3 Storage - Intro

Server:

  • iRODS Storage plugin abstracting an S3 "bucket"
    • https://github.com/irods/irods_resource_plugin_s3

Client:

  • Python iRODS Client (PRC) 
    • https://github.com/irods/python-irodsclient

 

 

Multiple  Connections to/from S3 Storage - Intro

New "Multi-1247" Parallel Transfer

  • Multithreaded / Multiprocess
  • For N threads (1 <= N <= 4 usually) there are N client-initiated connections instead of server-maintained high ports
  • Client can re-use e.g. login credentials on all connects.
  • Multiple processes on the iRODS server and S3 plugin end must match the client threads in "intent" (offset, length).

 

Multiple  Connections to/from S3 Storage - Implementation

Challenges

  • S3 should work with old and new styles of Parallel Transfer
    • ​For present, PRC must agree with iput/iget conventions
  • S3 is non-POSIX - not as simple as open( ), read/write( ), close( )
    • ​Imposed restrictions include minimum "multipart" size.
    • Multiprocess transfers requires shared memory for coordination between processes.
    • Failure recovery requires a shared memory timeout mechanism

Multiple  Connections to/from S3 Storage - Demo

Thank You!

Questions?

UGM2021 - Parallel Transfer Between Python Client and S3 Storage

By iRODS Consortium

UGM2021 - Parallel Transfer Between Python Client and S3 Storage

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