[Users] Is this "dd" operation harmful?

[Dan Kenigsberg]

On Thu, Oct 11, 2012 at 11:38:19PM +0800, Shu Ming wrote:
> After reading the code, every mailbox should be 4096 byte size.
> And the total mailbox size is host * 4096. Ony one host is here, so
> the total mailbox size here is 4096. why should the 'dd' operation
> read 1024000 byte which is 1000K byte much lager than 4096 here?

The controlling parameter is MAX_HOST_ID=250, not the number of current
cluster members.