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authorBryan Newbold <bnewbold@archive.org>2020-09-03 16:36:35 -0700
committerBryan Newbold <bnewbold@archive.org>2020-09-03 16:36:35 -0700
commit62252a6179953ccc79a6cb60c40a756fa0a034e1 (patch)
tree0659bb9988590d67bb11f2772c5245a93a37bfe2
parent07754188a6003a8f4cce1c6012b2a05df49269f8 (diff)
downloadsandcrawler-62252a6179953ccc79a6cb60c40a756fa0a034e1.tar.gz
sandcrawler-62252a6179953ccc79a6cb60c40a756fa0a034e1.zip
OAI-PMH ingest notes
-rw-r--r--notes/ingest/2020-05_oai_pmh.md232
1 files changed, 232 insertions, 0 deletions
diff --git a/notes/ingest/2020-05_oai_pmh.md b/notes/ingest/2020-05_oai_pmh.md
index 2f20415..de9bfba 100644
--- a/notes/ingest/2020-05_oai_pmh.md
+++ b/notes/ingest/2020-05_oai_pmh.md
@@ -181,3 +181,235 @@ Dump again for crawling:
AND (ingest_file_result.status = 'no-capture' or ingest_file_result.status = 'cdx-error')
) TO '/grande/snapshots/oai_tocrawl_20200526.rows.json';
+Notes about crawl setup are in `journal-crawls` repo. Excluded the following domains:
+
+ 4876135 www.kb.dk REMOVE: too large and generic
+ 3110009 kb-images.kb.dk REMOVE: dead?
+ 1274638 mdz-nbn-resolving.de REMOVE: maybe broken
+ 982312 aggr.ukm.um.si REMOVE: maybe broken
+
+And went from about 42,826,313 rows to 31,773,874 unique URLs to crawl, so
+expecting at least 11,052,439 `no-capture` ingest results (and should probably
+filter for these or even delete from the ingest request table).
+
+## Post-ingest stats
+
+ SELECT ingest_file_result.status, COUNT(*)
+ FROM ingest_request
+ LEFT JOIN ingest_file_result
+ ON ingest_file_result.ingest_type = ingest_request.ingest_type
+ AND ingest_file_result.base_url = ingest_request.base_url
+ WHERE
+ ingest_request.ingest_type = 'pdf'
+ AND ingest_request.link_source = 'oai'
+ GROUP BY status
+ ORDER BY COUNT DESC
+ LIMIT 20;
+
+ status | count
+ -------------------------+----------
+ no-capture | 16804277
+ no-pdf-link | 14895249
+ success | 13898603
+ redirect-loop | 2709730
+ cdx-error | 827024
+ terminal-bad-status | 740037
+ wrong-mimetype | 604242
+ link-loop | 532553
+ null-body | 95721
+ wayback-error | 41864
+ petabox-error | 19204
+ | 15287
+ gateway-timeout | 510
+ bad-redirect | 318
+ skip-url-blocklist | 184
+ bad-gzip-encoding | 114
+ timeout | 78
+ spn2-cdx-lookup-failure | 59
+ invalid-host-resolution | 19
+ blocked-cookie | 6
+ (20 rows)
+
+Hrm, +8 million or so 'success', but that is a lot of no-capture. May be worth
+dumping the full kafka result topic, filter to OAI requests, and extracting the
+missing URLs.
+
+Top counts by OAI prefix:
+
+ SELECT
+ oai_prefix,
+ COUNT(CASE WHEN status = 'success' THEN 1 END) as success,
+ COUNT(*) as total
+ FROM (
+ SELECT
+ ingest_file_result.status as status,
+ -- eg "oai:cwi.nl:4881"
+ substring(ingest_request.link_source_id FROM 'oai:([^:]+):.*') AS oai_prefix
+ FROM ingest_request
+ LEFT JOIN ingest_file_result
+ ON ingest_file_result.ingest_type = ingest_request.ingest_type
+ AND ingest_file_result.base_url = ingest_request.base_url
+ WHERE
+ ingest_request.ingest_type = 'pdf'
+ AND ingest_request.link_source = 'oai'
+ ) t1
+ GROUP BY oai_prefix
+ ORDER BY total DESC
+ LIMIT 25;
+
+ oai_prefix | success | total
+ --------------------------+---------+---------
+ kb.dk | 0 | 7989412 (excluded)
+ repec | 1118591 | 2783448
+ bnf.fr | 0 | 2187277
+ hispana.mcu.es | 19404 | 1492639
+ bdr.oai.bsb-muenchen.de | 73 | 1319882 (excluded?)
+ hal | 564700 | 1049607
+ ukm.si | 0 | 982468 (excluded)
+ hsp.org | 0 | 810281
+ www.irgrid.ac.cn | 17578 | 748828
+ cds.cern.ch | 72811 | 688091
+ americanae.aecid.es | 69678 | 572792
+ biodiversitylibrary.org | 2121 | 566154
+ juser.fz-juelich.de | 22777 | 518551
+ espace.library.uq.edu.au | 6494 | 508960
+ igi.indrastra.com | 58689 | 478577
+ archive.ugent.be | 63654 | 424014
+ hrcak.srce.hr | 395031 | 414897
+ zir.nsk.hr | 153889 | 397200
+ renati.sunedu.gob.pe | 78399 | 388355
+ hypotheses.org | 3 | 374296
+ rour.neicon.ru | 7963 | 354529
+ generic.eprints.org | 261221 | 340470
+ invenio.nusl.cz | 6184 | 325867
+ evastar-karlsruhe.de | 62044 | 317952
+ quod.lib.umich.edu | 5 | 309135
+ (25 rows)
+
+Top counts by OAI prefix and status:
+
+ SELECT
+ oai_prefix,
+ status,
+ COUNT((oai_prefix,status))
+ FROM (
+ SELECT
+ ingest_file_result.status as status,
+ -- eg "oai:cwi.nl:4881"
+ substring(ingest_request.link_source_id FROM 'oai:([^:]+):.*') AS oai_prefix
+ FROM ingest_request
+ LEFT JOIN ingest_file_result
+ ON ingest_file_result.ingest_type = ingest_request.ingest_type
+ AND ingest_file_result.base_url = ingest_request.base_url
+ WHERE
+ ingest_request.ingest_type = 'pdf'
+ AND ingest_request.link_source = 'oai'
+ ) t1
+ GROUP BY oai_prefix, status
+ ORDER BY COUNT DESC
+ LIMIT 30;
+
+
+ oai_prefix | status | count
+ --------------------------+---------------+---------
+ kb.dk | no-capture | 7955231 (excluded)
+ bdr.oai.bsb-muenchen.de | no-capture | 1270209 (excluded?)
+ repec | success | 1118591
+ hispana.mcu.es | no-pdf-link | 1118092
+ bnf.fr | no-capture | 1100591
+ ukm.si | no-capture | 976004 (excluded)
+ hsp.org | no-pdf-link | 773496
+ repec | no-pdf-link | 625629
+ bnf.fr | no-pdf-link | 607813
+ hal | success | 564700
+ biodiversitylibrary.org | no-pdf-link | 531409
+ cds.cern.ch | no-capture | 529842
+ repec | redirect-loop | 504393
+ juser.fz-juelich.de | no-pdf-link | 468813
+ bnf.fr | redirect-loop | 436087
+ americanae.aecid.es | no-pdf-link | 409954
+ hrcak.srce.hr | success | 395031
+ www.irgrid.ac.cn | no-pdf-link | 362087
+ hal | no-pdf-link | 352111
+ www.irgrid.ac.cn | no-capture | 346963
+ espace.library.uq.edu.au | no-pdf-link | 315302
+ igi.indrastra.com | no-pdf-link | 312087
+ repec | no-capture | 309882
+ invenio.nusl.cz | no-pdf-link | 302657
+ hypotheses.org | no-pdf-link | 298750
+ rour.neicon.ru | redirect-loop | 291922
+ renati.sunedu.gob.pe | no-capture | 276388
+ t2r2.star.titech.ac.jp | no-pdf-link | 264109
+ generic.eprints.org | success | 261221
+ quod.lib.umich.edu | no-pdf-link | 253937
+ (30 rows)
+
+If we remove excluded prefixes, and some large/generic prefixes (bnf.fr,
+hispana.mcu.es, hsp.org), then the aggregate counts are:
+
+ no-capture | 16,804,277 -> 5,502,242
+ no-pdf-link | 14,895,249 -> 12,395,848
+
+Top status by terminal domain:
+
+ SELECT domain, status, COUNT((domain, status))
+ FROM (
+ SELECT
+ ingest_file_result.ingest_type,
+ ingest_file_result.status,
+ substring(ingest_file_result.terminal_url FROM '[^/]+://([^/]*)') AS domain
+ FROM ingest_file_result
+ LEFT JOIN ingest_request
+ ON ingest_file_result.ingest_type = ingest_request.ingest_type
+ AND ingest_file_result.base_url = ingest_request.base_url
+ WHERE
+ ingest_file_result.ingest_type = 'pdf'
+ AND ingest_request.link_source = 'oai'
+ ) t1
+ WHERE t1.domain != ''
+ GROUP BY domain, status
+ ORDER BY COUNT DESC
+ LIMIT 30;
+
+ domain | status | count
+ ----------------------------------+---------------+--------
+ hispana.mcu.es | no-pdf-link | 709701 (national scope)
+ gallica.bnf.fr | no-pdf-link | 601193 (national scope)
+ discover.hsp.org | no-pdf-link | 524212 (historical)
+ www.biodiversitylibrary.org | no-pdf-link | 479288
+ gallica.bnf.fr | redirect-loop | 435981 (national scope)
+ hrcak.srce.hr | success | 389673
+ hemerotecadigital.bne.es | no-pdf-link | 359243
+ juser.fz-juelich.de | no-pdf-link | 345112
+ espace.library.uq.edu.au | no-pdf-link | 304299
+ invenio.nusl.cz | no-pdf-link | 302586
+ igi.indrastra.com | no-pdf-link | 292006
+ openrepository.ru | redirect-loop | 291555
+ hal.archives-ouvertes.fr | success | 278134
+ t2r2.star.titech.ac.jp | no-pdf-link | 263971
+ bib-pubdb1.desy.de | no-pdf-link | 254879
+ quod.lib.umich.edu | no-pdf-link | 250382
+ encounters.hsp.org | no-pdf-link | 248132
+ americanae.aecid.es | no-pdf-link | 245295
+ www.irgrid.ac.cn | no-pdf-link | 242496
+ publikationen.bibliothek.kit.edu | no-pdf-link | 222041
+ www.sciencedirect.com | no-pdf-link | 211756
+ dialnet.unirioja.es | redirect-loop | 203615
+ edoc.mpg.de | no-pdf-link | 195526
+ bibliotecadigital.jcyl.es | no-pdf-link | 184671
+ hal.archives-ouvertes.fr | no-pdf-link | 183809
+ www.sciencedirect.com | redirect-loop | 173439
+ lup.lub.lu.se | no-pdf-link | 165788
+ orbi.uliege.be | no-pdf-link | 158313
+ www.erudit.org | success | 155986
+ lib.dr.iastate.edu | success | 153384
+ (30 rows)
+
+Follow-ups are TBD but could include:
+- crawling the ~5m no-capture links directly (eg, not `base_url`) from the
+ ingest result JSON, while retaining the ingest request for later re-ingest
+- investigating and iterating on PDF link extraction, both for large platforms
+ and randomly sampled from long tail
+- classifying OAI prefixes by type (subject repository, institutional
+ repository, journal, national-library, historical docs, greylit, law, etc)
+- running pdftrio over some/all of this corpus