# Node red multiple instances

**URL:** <https://discourse.nodered.org/t/node-red-multiple-instances/9787>\
**Category:** Core Development\
**Created:** [5 April 2019 06:09 UTC](https://discourse.nodered.org/t/node-red-multiple-instances/9787 "2019-04-05T06:09:51Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [6 April 2019 08:12 UTC](https://discourse.nodered.org/t/node-red-multiple-instances/9787/5 "2019-04-06T08:12:48Z")

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Instead of changing settings file, I use the -p command line option to specify the port. I also use nssm on windows for multiple instances. So each service launches for example...

- `node-red -p 1881 -u c:/nr1881`
- `node-red -p 1882 -u c:/nr1882`  
And so on.

BTW, @knolleary that document you linked to doesn't show the -p option or -t option.

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