Re: Question about Pool Size Expansion

Harms, Kevin


my understanding is that the current implementation assumes you have servers with the same configuration, so if for example, rank0 and rank1 have 5 targets each with 10GB, when you add rank2, you will have 150GB or an additional 5 targets with 10GB each. But I have not tested it myself.


From: <> on behalf of <>
Sent: Monday, August 23, 2021 9:34 AM
Subject: Re: [daos] Question about Pool Size Expansion

Hi Kevin,

Thanks for your reply. I noted. Maybe I'm missing something here, but does this lead us to expanding the size of an existing pool?
For example, let's say we have a pool with uuid=puuid and 100GB in size distributed over rank 0 and rank 1 now.
And, if we add a new server with rank2 with the following command, does it result in increasing the size of the pool with uuid=puuid to be more than 100GB?
To me, the following just results in distributing the data in the pool more horizontally, rank0-rank2?
dmg pool extend --pool=${puuid} --ranks=${rank2}

Thank you,

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