Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 77 (from laksa061)

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/enjoy-algorithm/introduction-to-hashing-in-programming-617960aeccf2\')), getAhrefsUnparsedNoserviceFromURL(\'https://medium.com/enjoy-algorithm/introduction-to-hashing-in-programming-617960aeccf2\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/medium.com\/enjoy-algorithm\/introduction-to-hashing-in-programming-617960aeccf2","crawl_time":1774226057,"first_indexed_time":0,"http_code":200,"src_unparsed":"com,medium!\/enjoy-algorithm\/introduction-to-hashing-in-programming-617960aeccf2 s443","src_root_hash":"13179037029838926277","history_drop_reason":null,"meta_title":"Introduction to Hashing in Programming | EnjoyAlgorithms","meta_descriptions":["Hashing is a process of mapping keys and values into the hash table using a hash function. Explore this blog to learn: how do we perform hash mapping in data structures? What are some popular hash functions?"],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":"Shubham Gautam","attrs_publish_time":1632741622,"attrs_original_publish_time":0,"attrs_is_republished":1,"attrs_nr_words":"3732","attrs_boilerpipe_nr_words":"3577","body_ext_links_number":9,"body_int_links_number":33,"meta_nofollow":0,"meta_noarchive":1,"props_was_rendered":0,"src_redirect":"","download_time_msec":689,"download_ttfb_msec":688,"download_size":46014}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	2.4 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/enjoy-algorithm/introduction-to-hashing-in-programming-617960aeccf2
Last Crawled	2026-03-23 00:34:17 (2 months ago)
First Indexed	not set
HTTP Status Code	200
Content
Meta Title	Introduction to Hashing in Programming \| EnjoyAlgorithms
Meta Description	Hashing is a process of mapping keys and values into the hash table using a hash function. Explore this blog to learn: how do we perform hash mapping in data structures? What are some popular hash functions?
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	Shubham Gautam
Publish Time	2021-09-27 11:20:22 (4 years ago)
Original Publish Time	not set
Republished	Yes
Word Count (Total)	3,732
Word Count (Content)	3,577
Links
External Links	9
Internal Links	33
Technical SEO
Meta Nofollow	No
Meta Noarchive	Yes
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	689
TTFB (ms)	688
Download Size (bytes)	46,014
Location
Host ID	77 (laksa077)
Partition ID	31
Root Hash	13179037029838926277
Unparsed URL	com,medium!/enjoy-algorithm/introduction-to-hashing-in-programming-617960aeccf2 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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