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Environment variables in par.txt
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
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2 Replies
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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
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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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