How DiskANN index built in milvus?

[ucasfl]

For DiskANN, it build index with static binary data, so in milvus, how it works? When insert data, does it generate specific binary data on disk, then building the index?

[chasingegg]

In milvus there are growing data(newly inserted data) and sealed data, and diskann will be built on the static sealed data

[ucasfl]

For static sealed data, are you keep it as the same format that DiskANN needed?

The input data over which to build an index, in .bin format. The first 4 bytes represent number of points as an integer. 
The next 4 bytes represent the dimension of data as an integer. The following n*d*sizeof(T) bytes contain the contents of 
the data one data point in time. sizeof(T) is 1 for byte indices, and 4 for float indices. This will be read by the program as 
int8_t for signed indices, uint8_t for unsigned indices or float for float indices.

https://github.com/microsoft/DiskANN/blob/main/workflows/SSD_index.md

[chasingegg]

Yes

[github-actions]

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