Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 77 (from laksa046)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa077.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 = 31 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://medium.com/lessons-from-history/how-the-fukushima-disaster-actually-happened-636cad9ab3a3\')), getAhrefsUnparsedNoserviceFromURL(\'https://medium.com/lessons-from-history/how-the-fukushima-disaster-actually-happened-636cad9ab3a3\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/medium.com\/lessons-from-history\/how-the-fukushima-disaster-actually-happened-636cad9ab3a3","crawl_time":1754995545,"first_indexed_time":0,"http_code":200,"src_unparsed":"com,medium!\/lessons-from-history\/how-the-fukushima-disaster-actually-happened-636cad9ab3a3 s443","src_root_hash":"13179037029838926277","history_drop_reason":"tooold","meta_title":"How the Fukushima Disaster ACTUALLY Happened | by The Silent Scribe | Lessons from History | Medium","meta_descriptions":["A 9.0-magnitude earthquake, followed by an enormous tsunami, hit the Japanese northeast coast on March 11, 2011, creating an accident at Fukushima Daiichi, which became the worst such event since…"],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":null,"attrs_publish_time":1742839073,"attrs_original_publish_time":1742839073,"attrs_is_republished":0,"attrs_nr_words":"368","attrs_boilerpipe_nr_words":"192","body_ext_links_number":5,"body_int_links_number":26,"meta_nofollow":0,"meta_noarchive":1,"props_was_rendered":0,"src_redirect":"","download_time_msec":821,"download_ttfb_msec":819,"download_size":26473}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	FAIL	`download_stamp > now() - 6 MONTH`	9.8 months ago
History drop	FAIL	`isNull(history_drop_reason)`	tooold
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://medium.com/lessons-from-history/how-the-fukushima-disaster-actually-happened-636cad9ab3a3
Last Crawled	2025-08-12 10:45:45 (9 months ago)
First Indexed	not set
HTTP Status Code	200
Content
Meta Title	How the Fukushima Disaster ACTUALLY Happened \| by The Silent Scribe \| Lessons from History \| Medium
Meta Description	A 9.0-magnitude earthquake, followed by an enormous tsunami, hit the Japanese northeast coast on March 11, 2011, creating an accident at Fukushima Daiichi, which became the worst such event since…
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	2025-03-24 17:57:53 (1 year ago)
Original Publish Time	2025-03-24 17:57:53 (1 year ago)
Republished	No
Word Count (Total)	368
Word Count (Content)	192
Links
External Links	5
Internal Links	26
Technical SEO
Meta Nofollow	No
Meta Noarchive	Yes
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	821
TTFB (ms)	819
Download Size (bytes)	26,473
Location
Host ID	77 (laksa077)
Partition ID	31
Root Hash	13179037029838926277
Unparsed URL	com,medium!/lessons-from-history/how-the-fukushima-disaster-actually-happened-636cad9ab3a3 s443

🕷️ Crawler Inspector

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1. Shard Calculation

Query:

Response:

2. Crawled Status Check

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Response:

3. Robots.txt Check

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Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

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