# How to make a (maintenance) reservation global?
**URL:** https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857
**Category:** Users/Site Administrators
**Created:** [November 14, 2019, 12:29am UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857 "2019-11-14T00:29:29Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@datakid](https://community.openpbs.org/u/datakid)
#### Post date: [November 14, 2019, 12:29am UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857/1 "2019-11-14T00:29:29Z")
This isn’t obvious or easy to answer. The pbs\_rsub command man page has lots of information, but nothing on which user can even do this - apparently root isn’t sufficient to place a global reservation?
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### Author:  [@datakid](https://community.openpbs.org/u/datakid)
#### Post date: [November 14, 2019, 3:39am UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857/2 "2019-11-14T03:39:09Z")
Ok. So I’ve discovered something called dedicated\_time that almost makes sense. So I need a “shrink to fit” as well?
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### Author:  [@datakid](https://community.openpbs.org/u/datakid)
#### Post date: [November 14, 2019, 3:46am UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857/3 "2019-11-14T03:46:13Z")
If any of the dev team read these - and I don’t mean this to be rude - but the top 35 lines of dedicated\_time are a copy right notice that I will never need instead of a short summary on how this file might be used. It would be nicer if the notice was removed and the basics of dedicated time usage put in instead.
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### Author:  [@datakid](https://community.openpbs.org/u/datakid)
#### Post date: [November 14, 2019, 3:50am UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857/4 "2019-11-14T03:50:48Z")
What is a dedicated queue?
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### Author:  [@adarsh](https://community.openpbs.org/u/adarsh)
#### Post date: [November 14, 2019, 12:48pm UTC](https://community.openpbs.org/t/how-to-make-a-maintenance-reservation-global/1857/5 "2019-11-14T12:48:11Z")
A queue name with the “ded” prefix and is only active in the time range mentioned in the $PBS\_HOME/sched\_priv/dedicated\_time . This is usually used when you have a pre-scheduled system maintenance in place, in that time period, some users need to get there work done (hopefully if the resources are available)
\*walltime request on the jobs is mandatory, otherwise, default walltime is 5 years.