Arquivo.pt main goal is the preservation and access of web contents that are no longer available online. During the developing of the PWA IR (information retrieval) system we faced limitations in searching speed, quality of results, scalability and usability. To cope with this, we modified the archive-access project (http://archive-access.sourceforge.net/) to support our web archive IR requirements. Nutchwax, Nutch and Wayback’s code were adapted to meet the requirements. Several optimizations were added, such as simplifications in the way document versions are searched and several bottlenecks were resolved. The PWA search engine is a public service at http://archive.pt and a research platform for web archiving. As it predecessor Nutch, it runs over Hadoop clusters for distributed computing following the map-reduce paradigm. Its major features include fast full-text search, URL search, phrase search, faceted search (date, format, site), and sorting by relevance and date. The PWA search engine is highly scalable and its architecture is flexible enough to enable the deployment of different configurations to respond to the different needs. Currently, it serves an archive collection searchable by full-text with 180 million documents ranging between 1996 and 2010.
What is the URL that originated the issue? https://arquivo.pt/url/search?q=sines.pt&l=pt&from=19910806&to=20220527&trackingId=5fa9f95293b299e3a474_b539aa966c14140b9f9f&adv_and=sines.pt&viewMode=table
What happened? If the user has a narrow window, the Table view seems to be empty if there are not old versions for an URL (1991-2006).
However there many versions on following years:
Considering that most URLs do not have old versions in 1990s, we should:
By default set the focus on the right of the table (quick fix);
OR present the Table columns only between first version and ending on the last one found. In this example, the UI would present a table like this: