# Question about Ordering unsorted dataset with network shuffle

**URL:** <https://discuss.hail.is/t/question-about-ordering-unsorted-dataset-with-network-shuffle/3836>\
**Category:** Hail Query & hailctl\
**Created:** [May 16, 2024, 9:20pm UTC](https://discuss.hail.is/t/question-about-ordering-unsorted-dataset-with-network-shuffle/3836 "2024-05-16T21:20:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![User200](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/user200/32/1143_2.png) [@User200](https://discuss.hail.is/u/User200)\
**Post date:** [May 16, 2024, 9:20pm UTC](https://discuss.hail.is/t/question-about-ordering-unsorted-dataset-with-network-shuffle/3836/1 "2024-05-16T21:20:18Z")

</div>

Hello!  
I read a vcf file of 1000 genomes data with hail. I combined it with my hail matrix table with union\_cols to do PCA.  
But when I ran eigenvalues, pcs, \_ = hl.hwe\_normalized\_pca(combined.GT), it took a long time, I did not get results, and it said Ordering unsorted dataset with network shuffle.  
I am confused about why it was ordering the dataset, and if there is a way to order it before running pca.  
Thank you so much!