# GridConnectivity: does anyone use it?

**URL:** https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131
**Category:** Development
**Created:** [May 3, 2021, 2:22pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131 "2021-05-03T14:22:51Z")
**Posts on this page:** 7
**Page:** 1

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [May 3, 2021, 2:22pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/1 "2021-05-03T14:22:51Z")

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Does anyone use the **Grid Connectivity** filter in ParaView? The filter does not support paritioned dataset collections right now. I am trying to evaluate if its worth fixing it. Looking at the implementation its not entirely clear to me why one would use this filter.

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 3, 2021, 2:39pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/2 "2021-05-03T14:39:02Z")

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I do not use this filter but I still see the point of being able to run connectivity even on multiblock datasets without the need of merging into a ug.

That being said GridConnectivity seems to be highly specific to exodus input and even refers to Pedigree arrays in the code.

In any case there is no point of having a “GridConnectivity” and a “Connectivity” filter.

I’d vote for removing the filter and improving Connectvity filter to support partitioned dataset.

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### Author: ![Andy\_Bauer](https://discourse.paraview.org/user_avatar/discourse.paraview.org/andy_bauer/32/5442_2.png) [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [May 3, 2021, 2:44pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/3 "2021-05-03T14:44:04Z")

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I agree with Mathieu that the `Grid Connectivity` filter seems a bit redundant with the `Connectivity` filter. Maybe I’m missing the use case though and how that’s separate from the `Connectivity` filter. I do use the `Connectivity` filter and find it useful.

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [May 3, 2021, 2:44pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/4 "2021-05-03T14:44:16Z")

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Cool. It also produces some weird mutliblock output that does not preserve input structure. What’s what makes me wonder that no one uses it. It’s definitely old. I suspect written in early days of ParaView.

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [May 3, 2021, 2:44pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/5 "2021-05-03T14:44:48Z")

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Thanks folks…I’ll purge it. We can bring it back if ever needed or better yet, fortify the other `Connectivity` filter.

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### Author: ![Andy\_Bauer](https://discourse.paraview.org/user_avatar/discourse.paraview.org/andy_bauer/32/5442_2.png) [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)
#### Post date: [May 3, 2021, 2:46pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/6 "2021-05-03T14:46:11Z")

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Maybe wait a couple of days though for some more feedback. I’m not sure Mathieu and I are representative of the full ParaView community on this one 🙂

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [May 3, 2021, 4:02pm UTC](https://discourse.paraview.org/t/gridconnectivity-does-anyone-use-it/7131/7 "2021-05-03T16:02:47Z")

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the commit can always be reverted with ease…at least the dashboard won’t stay broken and introduce new failures :).
