Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 195 (from laksa153)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa195.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 = 57 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://cat.pdx.edu/platforms/linux/remote-access/persistent-screen/\')), getAhrefsUnparsedNoserviceFromURL(\'https://cat.pdx.edu/platforms/linux/remote-access/persistent-screen/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/cat.pdx.edu\/platforms\/linux\/remote-access\/persistent-screen\/","crawl_time":1774063849,"first_indexed_time":1561735073,"http_code":200,"src_unparsed":"edu,pdx!cat,\/platforms\/linux\/remote-access\/persistent-screen\/ s443","src_root_hash":"536666605424911595","history_drop_reason":null,"meta_title":"Keeping your shell sessions persistent with Screen – Computer Action Team","meta_descriptions":["Persistent Shell Sessions with Screen Screen is a program that facilitates the management of multiple shell sessions. When you run screen from a Linux command line, it will open a screen session on top of your current command line window, with a few important benefits:"],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en-us","attrs_author":null,"attrs_publish_time":1609319641,"attrs_original_publish_time":1561735073,"attrs_is_republished":1,"attrs_nr_words":"1246","attrs_boilerpipe_nr_words":"970","body_ext_links_number":1,"body_int_links_number":59,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":391,"download_ttfb_msec":390,"download_size":19165}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	2.5 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://cat.pdx.edu/platforms/linux/remote-access/persistent-screen/
Last Crawled	2026-03-21 03:30:49 (2 months ago)
First Indexed	2019-06-28 15:17:53 (6 years ago)
HTTP Status Code	200
Content
Meta Title	Keeping your shell sessions persistent with Screen – Computer Action Team
Meta Description	Persistent Shell Sessions with Screen Screen is a program that facilitates the management of multiple shell sessions. When you run screen from a Linux command line, it will open a screen session on top of your current command line window, with a few important benefits:
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	null
Publish Time	2020-12-30 09:14:01 (5 years ago)
Original Publish Time	2019-06-28 15:17:53 (6 years ago)
Republished	Yes
Word Count (Total)	1,246
Word Count (Content)	970
Links
External Links	1
Internal Links	59
Technical SEO
Meta Nofollow	No
Meta Noarchive	No
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	391
TTFB (ms)	390
Download Size (bytes)	19,165
Location
Host ID	195 (laksa195)
Partition ID	57
Root Hash	536666605424911595
Unparsed URL	edu,pdx!cat,/platforms/linux/remote-access/persistent-screen/ s443

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