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Use Feuer Disk-Cache - #6958
Use Feuer Disk-Cache#6958PSeitz wants to merge 3 commits into
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Port memory and disk cache integration from Pomsky while preserving upstream search behavior. Update configuration, metrics, documentation, and tests. Validation: 495 config/storage/search library tests passed on macOS; search, serve, and Lambda checks passed. Linux io_uring disk tests remain unverified. Generated with OpenAI gpt-6-astra.
Inline small test suites and consolidate overlapping cases and fixtures without changing production behavior. Validation: make fmt, git diff --check, and 484 config/storage/search library tests passed on macOS. Linux io_uring execution remains unverified. Generated with OpenAI gpt-6-astra.
Pin Feuer's portable zero-disk constructors and remove the direct feuer-memory dependency. Replace the separate fast-field cache with deprecated configuration aliases for memory-only split-range caching. Preserve shared-download cancellation across Feuer's initializer takeover and wait for metadata writes when testing disk recovery. Validation against the Git pin: 475 macOS and 500 Linux config/storage/search library tests passed. Search, serve, and Lambda compile checks, formatting, license generation, and diff checks passed. Generated with OpenAI gpt-6-astra.
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| return Ok(()); | ||
| } | ||
| let _in_flight_guards = object_storage_get_slice_in_flight_guards(buffer.len()); | ||
| default_get_slice_into(self, path, range, buffer).await?; |
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When a split-range cache miss on Azure fails after the first response chunk, this call drains the reconstructed reader outside Azure's retry closure. The old get_slice path retries get_to_bytes including download_all, whereas get_slice_stream only retries setup and the first chunk (azure_blob_storage.rs:497-515); with the default storage_timeout_policy: None, a transient mid-body failure now aborts the search instead of using the configured Azure retries. Keep the full body read inside the retry attempt.
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| if let Some(cached_response) = leaf_search_cache | ||
| // TODO remove the clone here. | ||
| .get(split.clone(), search_request.clone()) | ||
| .get_async(split.clone(), search_request.clone()) | ||
| .await |
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When partial_request_cache has a disk tier and a request spans many splits, process_partial_result_cache awaits every Feuer lookup before starting the next one. Disk hits therefore pay the sum of all per-entry I/O latencies, and no uncached split work is scheduled until the whole prepass finishes, so large multi-split searches can consume a substantial part of the request timeout despite Feuer exposing shared concurrent I/O queues. Buffer these lookups concurrently and merge their indexed results afterward.
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| if buffer.is_empty() { | ||
| return Ok(()); | ||
| } | ||
| let mut stream = storage.get_slice_stream(path, range).await?; |
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For GCS, the new default split-range cache eventually reaches this default method on OpendalStorage, so every source read is dispatched through get_slice_stream. The GCS OBJECT_STORAGE_GET_TOTAL increment, in-flight guards, and duration timer exist only in OpendalStorage::get_slice (opendal_storage/base.rs:225-239), while its stream method has none, causing cache-miss GET counts and latency metrics to disappear for GCS searchers. Add a GCS get_slice_into override or preserve the backend accounting around this streamed path.
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| # # Feuer fast-field RAM cache. Default 1G. Omitted while disk_cache | ||
| # # is set disables this cache; set a capacity explicitly to keep both. | ||
| # fast_field_cache_capacity: 1G |
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The shipped sample says operators can set fast_field_cache_capacity to keep it alongside disk_cache, but SearcherConfig::resolved_disk_cache rejects any configuration containing both, so following this guidance makes startup fail. The same sample later says omission disables disk_cache, although the resolver creates a 1 GB memory-only split-range cache when both settings are omitted; update these comments (and the matching querying overview) to describe the unified cache behavior documented in node-config.md.
AGENTS.md reference: AGENTS.md:L23-L24
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Replaced by #6962, using the intended source branch |
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