# Interaction of world age counter with multiple processes?

**URL:** https://discourse.julialang.org/t/interaction-of-world-age-counter-with-multiple-processes/4488
**Category:** Internals & Design
**Tags:** question
**Created:** [June 27, 2017, 11:18am UTC](https://discourse.julialang.org/t/interaction-of-world-age-counter-with-multiple-processes/4488 "2017-06-27T11:18:16Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Dan](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dan/32/42581_2.png) [@Dan](https://discourse.julialang.org/u/Dan)
#### Post date: [June 27, 2017, 11:18am UTC](https://discourse.julialang.org/t/interaction-of-world-age-counter-with-multiple-processes/4488/1 "2017-06-27T11:18:16Z")

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Hi Developers,

The world age counter brought me to a new age in the REPL where redefinitions can be made like a human without keeping a DAG in one’s head of dependent functions. +1 for that.

But with multiple processes there is a different namespace for each worker. Does Julia have a different world age for each worker? If not, how does this not create bug opportunities?

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### Author: ![jameson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jameson/32/23_2.png) [@jameson](https://discourse.julialang.org/u/jameson)
#### Post date: [June 28, 2017, 6:44am UTC](https://discourse.julialang.org/t/interaction-of-world-age-counter-with-multiple-processes/4488/2 "2017-06-28T06:44:46Z")

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> [@Dan](#):
>
> Does Julia have a different world age for each worker?

Yes