Re: Advice on hardware upgrade

Upgrades are application specific. You need to look at the logs for your current system and see if processor is maxing out of memory is swapping out to disk too much. 2GB RAM looks a bit small but that is irrelevant if your processor is at 100% all the time. You might also consider your disk

Re: Advice on hardware upgrade

Upgrading the RAM would have more benefit. Fuseki uses TDB which relies on memory mapped files so if you can provide more RAM more of your data can be kept in memory by the OS. Bear in mind that this memory is off-heap so if you do upgrade your RAM there should be no need to set the heap size

Jena Initializer Error

Hello there, I have a quick question. I am loading a 25 Meg Owl file to the memory using the following commands. My code is working fine through the IDE(IntelliJ), but when I create a runnable Jar, it does not find the file. I already put the owl file directory in the class path but I get

Re: problem with VALUES querybuilder

Hello there, I have a quick question. I am loading a 25 Meg Owl file to the memory using the following commands. My code is working fine through the IDE(IntelliJ), but when I create a runnable Jar, it does not find the file. I already put the owl file directory in the class path but I get

Re: Advice on hardware upgrade

i have noticed that a single fuseki instance spans quite a number of worker process (~32-35) on one of our root servers ( x86_64 GNU/Linux) with 8 cores and 128gb ram + ssd. does jena fuseki /tdb take full advantage of the extras cores on full load with these workers? On Wed, Nov 22, 2017 at

Re: sixteenth anniversary

great Andy, thank you. this will come in handy for us and future generations to trace the evolution of the Jena effort. btw was SiRPAC a direct precursor to the work at HP in Bristol or was the use of a java servlet containers generally in the air at the time and an obvious choice for a RDF

Similar results with full text search

Are there any plans on implementing similar text search for Jena? Until similarity is implemented, is it possible to query similar texts using Lucene directly, bypassing Jena, but with the same data set? Br, -- Lingsoft - 30 years of Leading Language Management www.lingsoft.fi Speech

Re: sixteenth anniversary

On 21/11/17 18:08, Marco Neumann wrote: congratulations to the entire Jena community it's a great open source for many projects, products and research activities around the world. is there a copy of the first release available with source code (http://www-uk.hpl.hp.com/people/bwm/rdf/jena

Re: Advice on hardware upgrade

On 22/11/17 12:35, Laura Morales wrote: Fuseki uses TDB which relies on memory mapped files Do you know if the same "memory mapped files" applies to other backends too, for example HDT? You'll have to check each of the backends - it's an implementation issue. Andy

Re: Advice on hardware upgrade

On 22/11/17 00:40, John Sanders wrote: Hi, I'm running a Fuseki server on a rather small server. I'm willing to upgrade it a little bit (since it's handling a lot of requests) so I was wondering which single component I could upgrade to get the best possible return. This I suppose boils

Re: sixteenth anniversary

OK, I think I can answer my own question here. in the java doc of version 1 it is explicitly mentioned that : "This API is derived from the SiRPAC API, most recently maintained by Sergey Melnik. It borrows from the subject centric approach of David Megginson's DATAX API and the cascading calls

Re: Advice on hardware upgrade

> Fuseki uses TDB which relies on memory mapped files Do you know if the same "memory mapped files" applies to other backends too, for example HDT?

Re: Jena Initializer Error

Neda, What is the call stack from the exception? it would be nice to know what it says as that would point to the location of the error. I suspect that you are not including all the necessary Jena libraries, but can not be certain. Claude On Thu, Nov 23, 2017 at 1:25 AM, Neda Alipanah

Re: Advice on hardware upgrade

On 22/11/17 13:37, Marco Neumann wrote: On Wed, Nov 22, 2017 at 2:15 PM, Andy Seaborne wrote: On 22/11/17 10:55, Marco Neumann wrote: i have noticed that a single fuseki instance spans quite a number of worker process (~32-35) on one of our root servers ( x86_64

Re: Advice on hardware upgrade

The behavior Andy describes is guided by the rule that generally, applications hosted in JEE containers are supposed to let the container manage threading. (I think that's written down somewhere in the JEE specs, but I can't remember where, and if it was, it is often "honored in the breach"!).

Re: Similar results with full text search

Hi Mikael! Fuzzy search is a basic Lucene feature, just like prefix searches. You should be able to use it directly via jena-text using a query like ?s text:query "word~" or ?s text:query "word~1" There is AFAICT nothing to implement on the jena-text side as this already works right now.

Re: Similar results with full text search

Hi Mikael! Sorry, I probably misunderstood - I somehow read "similar" as meaning "fuzzy" but they are of course not the same thing. So if you mean "give me documents similar to document X", that's called MoreLikeThis in Lucene, and it's currently not supported by jena-text. What's your use