• kdb+

  Environment variables in par.txt

  Posted by eohara_kdb on September 18, 2024 at 11:45 am

  Hi all,

  Just checking here if there is any way to use environment variables in par.txt?

  I have a segmented database that is available to multiple servers, and one of the segments is mounted on a different path in each server

  e.g. in server A it’s mounted under /path/to/segment_2/…

  in server B it’s under /path/to/segment/…

  I’ve tried setting the start of the path to a variable and using e.g. ${MOUNT_PREFIX} and getenv[`MOUNT_PREFIX] in par.txt, but there doesn’t seem to be a way to get kdb to resolve these when reading the file.

  If this isn’t possible, will most likely use sym links instead.

  Thanks,

  Eoghan

  eohara_kdb replied 2 months ago 2 Members · 2 Replies
• 2 Replies

• 

  unterrainer_ale

  Member

  September 18, 2024 at 12:19 pm

  As per the documentation, the par.txt file should contain the path to the individual segments. I don’t think you can use environment variables. https://code.kx.com/q4m3/14_Introduction_to_Kdb%2B/#144-segmented-tables

  “<code style=”display: inline !important;”>par.txt

  containing the paths of the physical locations of the segments, one segment path per line.”

  

  code.kx.com

  14. Introduction to Kdb+ - Q for Mortals

  Q for Mortals: a textbook for kdb+ and the q programming language

  • 

    eohara_kdb

    Member

    September 18, 2024 at 1:15 pm

    Thanks for the reply,

    Yeah looks like there’s no way around it. Thankfully sym links work as expected in par.txt

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