Krishnan Parthasarathi 4a1edfd9aa Different read quorum for tiered objects (#20115) ...

For a non-tiered object, MinIO requires that EcM (# of data blocks) of
xl.meta agree, corresponding to the number of data blocks needed to 
read this object.

OTOH, tiered objects have metadata in the hot tier and data in the 
warm tier. The data and its integrity are offloaded to the warm tier. This
allows us to reduce the read quorum from EcM (typically > N/2, where N -
erasure stripe width) to N/2 + 1. The simple majority of metadata
ensures consensus on what the object is and where it is
located.

2024-07-25 14:02:50 -07:00

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