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+
+Another update of journal metadata. In this case due to expanding "Keepers"
+coverage to PKP PLN, Hathitrust, Scholar's Portal, and Carniniana.
+
+Using `journal-metadata-bot` and `chocula.2020-10-08.json` export.
+
+## QA Testing
+
+    shuf -n1000 /srv/fatcat/datasets/chocula.2020-10-08.json | ./fatcat_import.py chocula --do-updates -
+    Counter({'total': 1000, 'exists': 640, 'exists-skip-update': 532, 'update': 348, 'exists-not-found': 108, 'insert': 12, 'skip': 0})
+
+Expecting roughly a 1/3 update rate. Most of these seem to be true updates (eg,
+adding kbart metadata). A smaller fraction are just updating DOAJ timestamp or
+not updating any metadata at all.
+
+    head -n500 /srv/fatcat/datasets/chocula.2020-10-08.json | ./fatcat_import.py chocula --do-updates -
+    Counter({'total': 500, 'exists': 372, 'exists-skip-update': 328, 'update': 121, 'exists-not-found': 44, 'insert': 7, 'skip': 0})
+
+    head -n500 /srv/fatcat/datasets/chocula.2020-10-08.json | ./fatcat_import.py chocula --do-updates -
+    Counter({'total': 500, 'exists': 481, 'exists-skip-update': 430, 'exists-not-found': 44, 'update': 19, 'exists-by-issnl': 7, 'skip': 0, 'insert': 0})
+
+Made some changes in `27fe31d5ffcac700c30b2b10d56685ef0fa4f3a8` which seem to
+have removed the spurious null updates, while retaining DOAJ date-only updates.
+
+Also as a small nit notice that occasionally `kbart` metadata gets added with
+no year spans. This seems to be common with cariniana. Presumably this happens
+when there is no year span info available, only volumes. Seems like a valuable
+thing to include as a flag anyways.
+
+## Prod Import
+
+Start small:
+
+    head -n100 /srv/fatcat/datasets/chocula.2020-10-08.json | ./fatcat_import.py chocula --do-updates -
+    => Counter({'total': 100, 'exists': 69, 'exists-skip-update': 68, 'update': 30, 'insert': 1, 'exists-by-issnl': 1, 'skip': 0})
+
+Full batch:
+
+    time cat /srv/fatcat/datasets/chocula.2020-10-08.json | ./fatcat_import.py chocula --do-updates -
+    => Counter({'total': 167092, 'exists': 110594, 'exists-skip-update': 109852, 'update': 55274, 'insert': 1224, 'exists-by-issnl': 742, 'skip': 0})
+
+    real    10m45.714s
+    user    4m51.680s
+    sys     0m12.236s