Hello Martin,

So:

1- not real issues, no - but it's a fairly basic implementation - I think it indexes fields which shouldn't be indexed (eg search for "00" will match every records cos the "dir" field is indexed). And there's no advanced features like record caching, faceting, fields collapsing, suggestions, ... all supported by xapian though. 

2- nope - I think EPS have one install that uses it but that was being implemented around the time I left so don't know where this went. It's at the "please test this" stage I'd say. But I appreciate it's not an easy task to take on as it requires knowledge of xapian (or solr or else) "under the hood".

3- my test dataset used 22k records: http://vmdev1.eprints.org/cgi/xapian (note I don't control that url anymore) - seems fast. It scales in O(n*m) if I recall correctly, with n the number of (matching) records and m the max number of facet values (m=1 for single fields and max(m) = 5 by default for multiple).

Hope this helps,

Seb

On 23.12.2014 08:55, martin.braendle@id.uzh.ch wrote:

Hi Seb,

can you answer the following questions:

- what do you mean by "be careful using the default eprints-xapian indexing" (shipped with eprints 3.3.12) ? Are there any known problems?
- in as far can the code on https://github.com/eprints/xapianv2 be considered as finished and be recommended for production? 
- was faceting tested on a real-world repo having 10'000s of records (and not only on 93 as with http://puffin.ecs.soton.ac.uk/) ? Is performance still good? E.g., on http://www.zora.uzh.ch/, depending on the search terms used, one may obtain 1000s of records.

Best regards,

Martin


--
Dr. Martin Brändle
Zentrale Informatik
Universität Zürich
Winterthurerstr. 190
CH-8057 Zürich

mail: martin.braendle@id.uzh.ch
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sf2 ---19/12/2014 21:51:32---  Sure thing.. install libxapian, libsearch-xapian-perl (yup that's

Von: sf2 <sf2@ecs.soton.ac.uk>
An: eprints-tech@ecs.soton.ac.uk
Datum: 19/12/2014 21:51
Betreff: [EP-tech] Re: Xapian install on Ubuntu 12.04
Gesendet von: eprints-tech-bounces@ecs.soton.ac.uk

---

Sure thing.. install libxapian, libsearch-xapian-perl (yup that's Search::Xapian) and voila. Then I'd install xapian-tools because some of their utility are damned useful to debup/map a xapian DB.

Then as a word of caution, I'd say be careful in using the default eprints-xapian indexing (what's shipped with eprints 3.3.x basically) cos it's very basic. Perhaps look up https://github.com/eprints/xapianv2 to do more advanced stuff such as faceting.

Seb

 

On 19.12.2014 20:25, Tomasz Neugebauer wrote:

We have the following instructions for installing Xapian on Ubuntu 12.04:

 

Install Xapian:

 

wget http://oligarchy.co.uk/xapian/1.2.13/xapian-core-1.2.13.tar.gz

wget http://oligarchy.co.uk/xapian/1.2.13/xapian-omega-1.2.13.tar.gz

wget http://oligarchy.co.uk/xapian/1.2.13/xapian-bindings-1.2.13.tar.gz

 

tar zxvf xapian-core-1.2.13.tar.gz

tar zxvf xapian-omega-1.2.13.tar.gz

tar zxvf xapian-bindings-1.2.13.tar.gz

 

cd xapian-core-1.2.13

sudo apt-get install uuid-dev

sudo ./configure

sudo make

sudo make install

 

cd xapian-omega-1.2.13

sudo apt-get install libpcre3-dev

sudo ./configure

sudo make

sudo make install

 

cd xapian-bindings-1.2.13

sudo ./configure

sudo make

sudo make install

 

sudo cpan Search::Xapian

 

We were wondering if it is preferable to use the Ubuntu packages instead?

 

We found these packages:

 

libept-dev - High-level library for managing Debian package information

libxapian-dev - Development files for Xapian search engine library

libxapian22 - Search engine library

libxapian22-dbg - Debugging symbols for the Xapian Search engine library

xapian-doc - Core Xapian documentation

xapian-examples - Xapian simple example programs

libsearch-xapian-perl - Perl bindings for the Xapian search library

xapian-omega - CGI search interface and indexers using Xapian

xapian-tools - Basic tools for Xapian search engine library

 

libsearch-xapian-perl looks to be the equivalent to CPAN’s Search::Xapian?

Does anyone have any experience with installing xapian on Ubuntu this way?

 

Thanks!

 

Tomasz

 

 

________________________________________________

Tomasz Neugebauer

Digital Projects & Systems Development Librarian

tomasz.neugebauer@concordia.ca 

Concordia University Libraries

1400 de Maisonneuve West (LB 341-3)

Tel.: (514) 848-2424 ex. 7738

Montreal, Canada

 

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