On Fri, Dec 21, 2018 at 10:18:40PM -0800, Raymond Jennings wrote:
> How do I specify the size of a block group at mkfs?

   You don't -- there's no explicit control over it. The FS will
decide based on the overall size of the filesystem in question.

   Typically, data groups are made of 1 GiB chunks, and metadata
groups are made of 256 MiB chunks (where the RAID level will determine
the number of chunks in a group and the amount of usable space of the
group).

   Hugo.

> 
> Like, for example, saying that data groups will be 1GiB, but metadata
> groups will be 1MiB?
> 
> I noticed that they had different default sizes based on the profile
> (dup vs single vs raid)

-- 
Hugo Mills             | Beware geeks bearing GIFs
hugo@... carfax.org.uk |
http://carfax.org.uk/  |
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