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The crawl spec abstraction was used to upload lists of domains into the system for future crawling. This was fairly clunky, and it was difficult to understand what was going to be crawled. Since a while back, a new domains listing view has been added to the control view that allows direct access to the domains table. This is much preferred and means the operator can directly manage domains without specs. This commit removes the crawl spec abstraction from the code, and changes the GUI to direct to the domains list instead. |
||
|---|---|---|
| .. | ||
| converting-process | ||
| crawling-process | ||
| index-constructor-process | ||
| loading-process | ||
| process-mq-api | ||
| test-data | ||
| website-adjacencies-calculator | ||
| readme.md | ||
Processes
1. Crawl Process
The crawling-process fetches website contents, temporarily saving them as WARC files, and then re-converts them into parquet models. Both are described in crawling-process/model.
2. Converting Process
The converting-process reads crawl data from the crawling step and processes them, extracting keywords and metadata and saves them as parquet files described in converting-process/model.
3. Loading Process
The loading-process reads the processed data.
It has creates an index journal, a link database, and loads domains and domain-links into the MariaDB database.
4. Index Construction Process
The index-construction-process constructs indices from the data generated by the loader.
Overview
Schematically the crawling and loading process looks like this:
+-----------+
| CRAWLING | Fetch each URL and
| STEP | output to file
+-----------+
|
//========================\\
|| Parquet: || Crawl
|| Status, HTML[], ... || Files
|| Status, HTML[], ... ||
|| Status, HTML[], ... ||
|| ... ||
\\========================//
|
+------------+
| CONVERTING | Analyze HTML and
| STEP | extract keywords
+------------+ features, links, URLs
|
//==================\\
|| Slop : || Processed
|| Documents[] || Files
|| Domains[] ||
|| Links[] ||
\\==================//
|
+------------+ Insert domains into mariadb
| LOADING | Insert URLs, titles in link DB
| STEP | Insert keywords in Index
+------------+
|
+------------+
| CONSTRUCT | Make the data searchable
| INDEX |
+------------+