Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 77 (from laksa102)

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/@dhaval.sony.504/basics-of-central-limit-theorem-f7c4d05ac6ac\')), getAhrefsUnparsedNoserviceFromURL(\'https://medium.com/@dhaval.sony.504/basics-of-central-limit-theorem-f7c4d05ac6ac\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/medium.com\/@dhaval.sony.504\/basics-of-central-limit-theorem-f7c4d05ac6ac","crawl_time":1770699647,"first_indexed_time":0,"http_code":200,"src_unparsed":"com,medium!\/@dhaval.sony.504\/basics-of-central-limit-theorem-f7c4d05ac6ac s443","src_root_hash":"13179037029838926277","history_drop_reason":null,"meta_title":"Basics Of Central Limit Theorem. The central limit theorem states that… | by Dhaval Raval | Medium","meta_descriptions":["Basics Of Central Limit Theorem The central limit theorem states that if you take sufficiently large samples from a population, the samples’ means will be normally distributed, even if the …"],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":"Dhaval Raval","attrs_publish_time":1685542481,"attrs_original_publish_time":0,"attrs_is_republished":1,"attrs_nr_words":"1326","attrs_boilerpipe_nr_words":"1111","body_ext_links_number":5,"body_int_links_number":28,"meta_nofollow":0,"meta_noarchive":1,"props_was_rendered":0,"src_redirect":"","download_time_msec":456,"download_ttfb_msec":429,"download_size":34051}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	3.8 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://medium.com/@dhaval.sony.504/basics-of-central-limit-theorem-f7c4d05ac6ac
Last Crawled	2026-02-10 05:00:47 (3 months ago)
First Indexed	not set
HTTP Status Code	200
Content
Meta Title	Basics Of Central Limit Theorem. The central limit theorem states that… \| by Dhaval Raval \| Medium
Meta Description	Basics Of Central Limit Theorem The central limit theorem states that if you take sufficiently large samples from a population, the samples’ means will be normally distributed, even if the …
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	Dhaval Raval
Publish Time	2023-05-31 14:14:41 (3 years ago)
Original Publish Time	not set
Republished	Yes
Word Count (Total)	1,326
Word Count (Content)	1,111
Links
External Links	5
Internal Links	28
Technical SEO
Meta Nofollow	No
Meta Noarchive	Yes
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	456
TTFB (ms)	429
Download Size (bytes)	34,051
Location
Host ID	77 (laksa077)
Partition ID	31
Root Hash	13179037029838926277
Unparsed URL	com,medium!/@dhaval.sony.504/basics-of-central-limit-theorem-f7c4d05ac6ac s443

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1. Shard Calculation

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Response:

2. Crawled Status Check

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3. Robots.txt Check

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4. Spam/Ban Check

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Response:

5. Seen Status Check

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