2019-10-01 JaLC metadata snapshot: <https://archive.org/download/jalc-bulk-metadata-2019>

Extracted .rdf file instead of piping it through zcat.

Use correct bot:

    export FATCAT_AUTH_WORKER_JALC=blah

Start small; do a random bunch (10k) single-threaded to pre-create containers:

    head -n100 /srv/fatcat/datasets/JALC-LOD-20191001.rdf | ./fatcat_import.py --batch-size 100 jalc - /srv/fatcat/datasets/ISSN-to-ISSN-L.txt
    shuf -n100 /srv/fatcat/datasets/JALC-LOD-20191001.rdf | ./fatcat_import.py --batch-size 100 jalc - /srv/fatcat/datasets/ISSN-to-ISSN-L.txt
    shuf -n10000 /srv/fatcat/datasets/JALC-LOD-20191001.rdf | ./fatcat_import.py --batch-size 100 jalc - /srv/fatcat/datasets/ISSN-to-ISSN-L.txt

Seemed like lots of individual containers getting added after repeating, so
just going to import single-threaded to avoid duplicate container creation:

    cat /srv/fatcat/datasets/JALC-LOD-20191001.rdf | ./fatcat_import.py --batch-size 100 jalc - /srv/fatcat/datasets/ISSN-to-ISSN-L.txt
    => Counter({'total': 8419745, 'exists': 6480683, 'insert': 1934082, 'skip': 4980, 'inserted.container': 134, 'update': 0})

Had a bit fewer than 4,568,120 "doi_registrar:jalc" releases before this
import, 6,502,202 after (based on `doi_registrar:jalc` query).