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Enable cache_only mode for the BF-Tree cache #810

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Merged
hildebrandmw merged 3 commits into from
Mar 3, 2026
Merged

Enable cache_only mode for the BF-Tree cache #810

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df40c02
Enable the cache in BFTree.
Mar 2, 2026
4953ecd
Enable cache-only mode.
Mar 2, 2026
038ad2b
Update diskann-providers/src/model/graph/provider/async_/caching/bf_c…
hildebrandmw Mar 2, 2026
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11 changes: 7 additions & 4 deletions diskann-providers/src/model/graph/provider/async_/caching/bf_cache.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,9 @@ impl Cache {
pub fn new(bytes: PowerOfTwo) -> diskann::ANNResult<Self> {
let mut config = bf_tree::Config::default();

// N.B.: When `https://github.com/gim-home/Bf-Tree/issues/59` is resolved, set
// `cache_only(true)`. But until then, keep this as false to prevent hangs.
config
.storage_backend(bf_tree::StorageBackend::Memory)
.cache_only(false)
.cache_only(true)
.cb_size_byte(bytes.raw());

Ok(Self {
Expand Down Expand Up @@ -1195,7 +1193,12 @@ mod tests {

let utilization = cache.estimate_utilization();

assert_eq!(utilization.used, 0);
assert!(
utilization.used <= utilization.capacity,
"cache utilization used ({}) must not exceed capacity ({})",
utilization.used,
utilization.capacity,
);
assert_eq!(utilization.capacity, capacity);

let mut v = VecCacher::<f32>::new(128);
Expand Down
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