• kdb+

  KDB with Java

  Posted by k-mambo on December 6, 2022 at 12:00 am

  I’m use KxSystems/javakdb with commons-pool2.

  Is the connection pool meaningless because KDB+ is a single thread?

  Is it better to connect a TCP session when a request is required?

  Is there any advantage in using Flip in Java rather than .j.j when processing function results?

  I’m sorry I have many questions.

   

  k-mambo replied 9 months, 2 weeks ago 2 Members · 1 Reply
• 1 Reply

• 

  rocuinneagain

  Member

  December 7, 2022 at 12:00 am

  One item to note is that .j.j will put processing load on to the kdb+ process.

  JSON also only has a limited set of datatypes which means you will need to write more q code to perform parsing/casting

  • https://www.w3schools.com/js/js_json_datatypes.asp
  • https://kx.com/blog/kdb-q-insights-parsing-json-files/

   

  Using the c.flip distributes the serialisation work across your java processes/threads and minimizes the work kdb+ will have to do to deserialise/parse/cast.

   

  kdb+ does have a multithreaded input queue mode (but it does have restrictions)

  • https://code.kx.com/q/kb/multithreaded-input/

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