# caculate chunk size for the future

- From: d tbsky \<hidden\>
- Date: 2017-06-20 16:43:40 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2017/06/6635909
- Thread: https://ratatoskr.run/linux-raid/2017/06/6635909/t.md

```text
hi:
    I have a 4 disk software raid6. I found chunk size 512k give me
best performance for my workload.

    if I grow up the raid to 32 disks, may I assume chunk size 64K
will give me similar performance? or there will other impact when I
grow the disks in the future?

  I saw discussion about internal bitmap hit the performance for 20
disks raid10. is raid5/6 ok under the same situation?

     thanks a lot for help!

Regards,
tbskyd
```