Constant DEFAULT_VNODE_COUNT 

pub const DEFAULT_VNODE_COUNT: u16 = 256;

Default virtual partition count for state key distribution.

Manifests are written with this value unless the caller overrides via CheckpointManifest::new_with_vnode_count. CheckpointStore impls pass the runtime value into CheckpointManifest::validate so a manifest written with a different count is flagged on restore.