[gpfsug-discuss] Blocksize

[Stef Coene]

On 09/22/2016 09:07 PM, J. Eric Wonderley wrote:
> It defaults to 4k:
> mmlsfs testbs8M -i
> flag                value                    description
> ------------------- ------------------------
> -----------------------------------
>  -i                 4096                     Inode size in bytes
>
> I think you can make as small as 512b.   Gpfs will store very small
> files in the inode.
>
> Typically you want your average file size to be your blocksize and your
> filesystem has one blocksize and one inodesize.

The files are not small, but around 20 MB on average.
So I calculated with IBM that a 1 MB or 2 MB block size is best.

But I'm not sure if it's better to use a smaller block size for the 
metadata.

The file system is not that large (400 TB) and will hold backup data 
from CommVault.


Stef