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Multipart.md

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Multipart backend format

When multipart upload is used for objects, below meta-data/staging files are created

  • New multipart upload call creates file EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.uploadid
  • Put object part call creates file EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.PART_NUMBER.MD5SUM_STRING
  • Abort multipart call removes all files matching EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.*
  • Complete multipart call does
    1. Create a staging file EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete.TEMP_NAME then rename to EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete
    2. Rename staging file EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete to EXPORT_DIR/BUCKET/PATH/TO/OBJECT