DAS

In the dill system, there are two sampling behaviors：

1. Nodes actively join the P2P subnet for sampling data propagation, and the minimum unit of data sampling is the entire column.

1. After synchronizing with a block or block header, nodes in the dill system initiate sampling requests to other nodes that retain the data. The minimum unit of data sampling is a cell, which represents the intersection point of a row and a column in the 2D EC (Erasure Coding) scheme.

Full nodes adopt the first sampling behavior to assist in data dissemination, while light nodes utilize the second method for sampling.