Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 171 (from laksa016)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa171.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 = 20 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://sat.edu.sg/ideal-sat-test-centre-in-singapore/\')), getAhrefsUnparsedNoserviceFromURL(\'https://sat.edu.sg/ideal-sat-test-centre-in-singapore/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/sat.edu.sg\/ideal-sat-test-centre-in-singapore\/","crawl_time":1779503185,"first_indexed_time":1753194944,"http_code":200,"src_unparsed":"sg,edu,sat!\/ideal-sat-test-centre-in-singapore\/ s443","src_root_hash":"12855850274254644171","history_drop_reason":null,"meta_title":"How To Choose The Ideal SAT Test Centre In Singapore - Prep Zone Academy | SAT","meta_descriptions":["Choosing the right SAT test center in Singapore, whether at international schools or independent institutions, is crucial for feeling confident and comfortable on exam day."],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en-us","attrs_author":"Prep Zone Academy","attrs_publish_time":1753164957,"attrs_original_publish_time":1753164957,"attrs_is_republished":0,"attrs_nr_words":"1213","attrs_boilerpipe_nr_words":"664","body_ext_links_number":9,"body_int_links_number":36,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":1675,"download_ttfb_msec":1674,"download_size":23966}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.4 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://sat.edu.sg/ideal-sat-test-centre-in-singapore/
Last Crawled	2026-05-23 02:26:25 (11 days ago)
First Indexed	2025-07-22 14:35:44 (10 months ago)
HTTP Status Code	200
Content
Meta Title	How To Choose The Ideal SAT Test Centre In Singapore - Prep Zone Academy \| SAT
Meta Description	Choosing the right SAT test center in Singapore, whether at international schools or independent institutions, is crucial for feeling confident and comfortable on exam day.
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-us
Author	Prep Zone Academy
Publish Time	2025-07-22 06:15:57 (10 months ago)
Original Publish Time	2025-07-22 06:15:57 (10 months ago)
Republished	No
Word Count (Total)	1,213
Word Count (Content)	664
Links
External Links	9
Internal Links	36
Technical SEO
Meta Nofollow	No
Meta Noarchive	No
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	1,675
TTFB (ms)	1,674
Download Size (bytes)	23,966
Location
Host ID	171 (laksa171)
Partition ID	20
Root Hash	12855850274254644171
Unparsed URL	sg,edu,sat!/ideal-sat-test-centre-in-singapore/ s443

🕷️ Crawler Inspector

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1. Shard Calculation

Query:

Response:

2. Crawled Status Check

Query:

Response:

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

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