do collection can span multiple query pods load

[hxlsky]

my collection has 30GB data,i want to load it into query pods,there are 3 query pods in my k8s,but has 10GB RAM each one，when load the collection,what happen? failed or success?

[yhmo]

Mainly depends on index types and mmap configurations.

• If mmap is disabled:
  IVF_FLAT/HNSW ----------------- unable to load since memory is insufficient
  IVF_SQ8/IVF_PQ/SCANN/DISKANN -------------- able to load

• If you enabled mmap, all these index types can be loaded

[hxlsky]

what is the mmap?

[hxlsky]

how to check the mmap is enabled or disable?

[hxlsky]

does the mmap can enabled/disable for a collection? no the entire milvusdb

[yhmo]

mmap concept: https://milvus.io/docs/glossary.md#Mmap

mmap configurations, configured in the milvus.yaml
https://milvus.io/docs/mmap.md

In 2.4

queryNode:
  mmap:
    mmapEnabled: true

In 2.5

queryNode:
  mmap:
    vectorField: false # Enable mmap for loading vector data
    vectorIndex: true # Enable mmap for loading vector index
    scalarField: false # Enable mmap for loading scalar data
    scalarIndex: true # Enable mmap for loading scalar index

[yhmo]

Enable mmap for a collection, not for the entire db:
https://milvus.io/docs/create-collection.md#Enable-mmap