# Max number of collections / indexes with PerconaFT

**URL:** <https://forums.percona.com/t/max-number-of-collections-indexes-with-perconaft/4706>\
**Category:** Percona Server for MongoDB\
**Created:** [February 8, 2016, 10:03am UTC](https://forums.percona.com/t/max-number-of-collections-indexes-with-perconaft/4706 "2016-02-08T10:03:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![flozano](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/flozano/32/1105_2.png) [@flozano](https://forums.percona.com/u/flozano)\
**Post date:** [February 8, 2016, 10:03am UTC](https://forums.percona.com/t/max-number-of-collections-indexes-with-perconaft/4706/1 "2016-02-08T10:03:10Z")

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I’ve tried to find the information myself but I couldn’t, so here it goes:

What is the max number of collections+indexes a single node can have when using PerconaFT? WiredTiger uses file per collection + file per index, which effectively limits the amount substantially. RocksDB works well for huge numbers (N millions), and I would like to confirm PerconaFT engine’s technical limits on this.

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**Author:** ![luis.contreras](https://avatars.discourse-cdn.com/v4/letter/l/df705f/32.png) [@luis.contreras](https://forums.percona.com/u/luis.contreras)\
**Post date:** [February 11, 2016, 8:44am UTC](https://forums.percona.com/t/max-number-of-collections-indexes-with-perconaft/4706/2 "2016-02-11T08:44:22Z")

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Hi Flozano,

By default its 24000 names spaces in the 16 MB file, also each collection can only have 64 indexes. This means if you have 1 index per collection you can have 24k collections but at 64 indexes per collection you can have 375.

I hope that info helps you.

regards,