# Can Slicer utilise multiple cores on linux?

**URL:** <https://discourse.slicer.org/t/can-slicer-utilise-multiple-cores-on-linux/9240>\
**Category:** Support\
**Created:** [November 21, 2019, 10:23am UTC](https://discourse.slicer.org/t/can-slicer-utilise-multiple-cores-on-linux/9240 "2019-11-21T10:23:20Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [November 21, 2019, 1:33pm UTC](https://discourse.slicer.org/t/can-slicer-utilise-multiple-cores-on-linux/9240/2 "2019-11-21T13:33:28Z")

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Hi -

For a file that size it’s probably best not to compress it. You can save the file uncompressed using the options checkbox in the save dialog.

Here’s a way to set compression off for all volume nodes if you want that:

[https://www.slicer.org/wiki/Documentation/Nightly/ScriptRepository#Change\_file\_type\_for\_saving\_for\_all\_volumes\_.28with\_already\_existing\_storage\_nodes.29](https://www.slicer.org/wiki/Documentation/Nightly/ScriptRepository#Change_file_type_for_saving_for_all_volumes_.28with_already_existing_storage_nodes.29)

There’s more information in this thread:

> [@How to unset default 'compress' option during save](https://discourse.slicer.org/t/how-to-unset-default-compress-option-during-save/4488):
>
> Hi, Is there a way to default compress option to NO for save dialog? Compress option is not visible immediately to new Slicer users, and compressing single threaded such large dataset (2000^3) is extremely slow. We are talking about 15 sec for uncomressed data and dozens of minutes with compress enabled on an ssd. Again for a new user, it is not immediately clear to the user whether Slicer stalled/crashed or doing something. In case someone wants to see, here is a test dataset: [https://ndownl…](https://ndownloader.figshare.com/files/12808130)

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