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feat(storage): add direct chunk GET fast path (#2351)

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Signed-off-by: houseme <housemecn@gmail.com>
Co-authored-by: heihutu <heihutu@gmail.com>
Co-authored-by: cxymds <Cxymds@qq.com>
This commit is contained in:
houseme
2026-04-07 08:33:46 +08:00
committed by GitHub
parent 8d27170ce4
commit 32bf8f5bf3
84 changed files with 15932 additions and 3592 deletions
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crates/config/src/constants/zero_copy.rs
+28
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@@ -49,6 +49,34 @@ pub const ENV_OBJECT_ZERO_COPY_ENABLE: &str = "RUSTFS_OBJECT_ZERO_COPY_ENABLE";
/// to regular I/O without errors.
pub const DEFAULT_OBJECT_ZERO_COPY_ENABLE: bool = true;
/// Environment variable for zero-copy read operating mode.
///
/// Supported values:
/// - `off`: disable mmap-backed chunk fast path and always use the compatibility path
/// - `conservative`: allow a single mmap window per request
/// - `balanced`: allow multiple mmap windows with the default size guardrails
/// - `aggressive`: allow multi-window mmap and relax the small-object cutoff
pub const ENV_OBJECT_ZERO_COPY_MODE: &str = "RUSTFS_OBJECT_ZERO_COPY_MODE";
/// Default zero-copy read mode.
pub const DEFAULT_OBJECT_ZERO_COPY_MODE: &str = "balanced";
/// Environment variable for the maximum mmap window size used by the chunk fast path.
///
/// This controls the visible bytes per mapped chunk before the implementation emits a new window.
pub const ENV_OBJECT_ZERO_COPY_MMAP_WINDOW_BYTES: &str = "RUSTFS_OBJECT_ZERO_COPY_MMAP_WINDOW_BYTES";
/// Default mmap window size for chunk fast path reads: 8 MiB.
pub const DEFAULT_OBJECT_ZERO_COPY_MMAP_WINDOW_BYTES: usize = 8 * 1024 * 1024;
/// Environment variable for the maximum total active mmap bytes.
///
/// Requests that would exceed this active window budget fall back to the compatibility path.
pub const ENV_OBJECT_ZERO_COPY_MAX_ACTIVE_MMAP_BYTES: &str = "RUSTFS_OBJECT_ZERO_COPY_MAX_ACTIVE_MMAP_BYTES";
/// Default maximum active mmap bytes across concurrent local chunk fast-path reads: 256 MiB.
pub const DEFAULT_OBJECT_ZERO_COPY_MAX_ACTIVE_MMAP_BYTES: usize = 256 * 1024 * 1024;
// =============================================================================
// Direct I/O Configuration
// =============================================================================