Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 91 (from laksa130)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa091.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 82 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://dl.acm.org/doi/10.1109/34.41390\')), getAhrefsUnparsedNoserviceFromURL(\'https://dl.acm.org/doi/10.1109/34.41390\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/dl.acm.org\/doi\/10.1109\/34.41390","crawl_time":1760233148,"first_indexed_time":1701920496,"http_code":200,"src_unparsed":"org,acm!dl,\/doi\/10.1109\/34.41390 s443","src_root_hash":"6385618855135636491","history_drop_reason":null,"meta_title":"Application of the Karhunen-Loeve Procedure for the Characterization of Human Faces | IEEE Transactions on Pattern Analysis and Machine Intelligence","meta_descriptions":["The use of natural symmetries (mirror images) in a well-defined family of patterns (human faces) is discussed within the framework of the Karhunen-Loeve expansion. This results in an extension of t..."],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1701920496,"attrs_is_republished":0,"attrs_nr_words":"2130","attrs_boilerpipe_nr_words":"7","body_ext_links_number":51,"body_int_links_number":95,"meta_nofollow":0,"meta_noarchive":1,"props_was_rendered":0,"src_redirect":"","download_time_msec":1664,"download_ttfb_msec":278,"download_size":25283}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	FAIL	`download_stamp > now() - 6 MONTH`	7.8 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Property	Value
URL	https://dl.acm.org/doi/10.1109/34.41390
Last Crawled	2025-10-12 01:39:08 (7 months ago)
First Indexed	2023-12-07 03:41:36 (2 years ago)
HTTP Status Code	200
Content
Meta Title	Application of the Karhunen-Loeve Procedure for the Characterization of Human Faces \| IEEE Transactions on Pattern Analysis and Machine Intelligence
Meta Description	The use of natural symmetries (mirror images) in a well-defined family of patterns (human faces) is discussed within the framework of the Karhunen-Loeve expansion. This results in an extension of t...
Meta Canonical	null
Boilerpipe Text	heavy column, fetched on demand
Markdown	heavy column, fetched on demand
Readable Markdown	heavy column, fetched on demand
ML Classification
ML Categories	null
ML Page Types	null
ML Intent Types	null
Content Metadata
Language	en
Author	null
Publish Time	not set
Original Publish Time	2023-12-07 03:41:36 (2 years ago)
Republished	No
Word Count (Total)	2,130
Word Count (Content)	7
Links
External Links	51
Internal Links	95
Technical SEO
Meta Nofollow	No
Meta Noarchive	Yes
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	1,664
TTFB (ms)	278
Download Size (bytes)	25,283
Location
Host ID	91 (laksa091)
Partition ID	82
Root Hash	6385618855135636491
Unparsed URL	org,acm!dl,/doi/10.1109/34.41390 s443

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1. Shard Calculation

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2. Crawled Status Check

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4. Spam/Ban Check

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5. Seen Status Check

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