🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 136 (from laksa032)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa136.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 = 29 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.datacamp.com/tutorial/eigenvectors-eigenvalues\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.datacamp.com/tutorial/eigenvectors-eigenvalues\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.datacamp.com\/tutorial\/eigenvectors-eigenvalues","crawl_time":1777068468,"first_indexed_time":1726625916,"http_code":200,"src_unparsed":"com,datacamp!www,\/tutorial\/eigenvectors-eigenvalues s443","src_root_hash":"7979813049800185936","history_drop_reason":null,"meta_title":"Eigenvectors and Eigenvalues: Key Insights for Data Science | DataCamp","meta_descriptions":["Eigenvectors are vectors that remain in the same direction under a linear transformation. Eigenvalues are the factors by which they are stretched or compressed."],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":618,\"\/Science\/Computer_Science\":473,\"\/Science\/Computer_Science\/Machine_Learning_and_Artificial_Intelligence\":437,\"\/Computers_and_Electronics\":409,\"\/Computers_and_Electronics\/Software\":331,\"\/Computers_and_Electronics\/Software\/Educational_Software\":315}","ml_types_json":"{\"\/Article\":998,\"\/Article\/Tutorial_or_Guide\":888}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":"Islam Salahuddin","attrs_publish_time":0,"attrs_original_publish_time":1726625916,"attrs_is_republished":0,"attrs_nr_words":"3398","attrs_boilerpipe_nr_words":"2281","body_ext_links_number":10,"body_int_links_number":180,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":144,"download_ttfb_msec":86,"download_size":82110}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 136 · Partition 29

laksa136

7979813049800185936

📄

INDEXABLE

✅

CRAWLED

1 month ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	1.3 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

Page Details

Property

Value

URL

https://www.datacamp.com/tutorial/eigenvectors-eigenvalues

Last Crawled

2026-04-24 22:07:48 (1 month ago)

First Indexed

2024-09-18 02:18:36 (1 year ago)

HTTP Status Code

200

Content

Meta Title

Eigenvectors and Eigenvalues: Key Insights for Data Science | DataCamp

Meta Description

Eigenvectors are vectors that remain in the same direction under a linear transformation. Eigenvalues are the factors by which they are stretched or compressed.

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

/Science		61.8%
/Science/Computer_Science		47.3%
/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence		43.7%
/Computers_and_Electronics		40.9%
/Computers_and_Electronics/Software		33.1%
/Computers_and_Electronics/Software/Educational_Software		31.5%

Raw JSON

{
    "/Science": 618,
    "/Science/Computer_Science": 473,
    "/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence": 437,
    "/Computers_and_Electronics": 409,
    "/Computers_and_Electronics/Software": 331,
    "/Computers_and_Electronics/Software/Educational_Software": 315
}

ML Page Types

/Article		99.8%
/Article/Tutorial_or_Guide		88.8%

Raw JSON

{
    "/Article": 998,
    "/Article/Tutorial_or_Guide": 888
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

Islam Salahuddin

Publish Time

not set

Original Publish Time

2024-09-18 02:18:36 (1 year ago)

Republished

Word Count (Total)

3,398

Word Count (Content)

2,281

Links

External Links

Internal Links

180

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

144

TTFB (ms)

Download Size (bytes)

82,110

Location

Host ID

136 (laksa136)

Partition ID

Root Hash

7979813049800185936

Unparsed URL

com,datacamp!www,/tutorial/eigenvectors-eigenvalues s443