VortexOpenOptions

vortex_file

Struct VortexOpenOptions 

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pub struct VortexOpenOptions { /* private fields */ }
Expand description

Open options for a Vortex file reader.

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impl VortexOpenOptions

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pub fn new() -> Self

Create a new VortexOpenOptions with the expected options for the file source.

This should not be used directly, instead public API clients are expected to access either VortexOpenOptions::new() or VortexOpenOptions::memory()

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pub fn with_initial_read_size(self, initial_read_size: usize) -> Self

Configure the initial read size for the Vortex file.

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pub fn with_segment_cache(self, segment_cache: Arc<dyn SegmentCache>) -> Self

Configure a custom SegmentCache.

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pub fn without_segment_cache(self) -> Self

Disable segment caching entirely.

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pub fn with_handle(self, handle: Handle) -> Self

Configure a Handle to use for opening the file.

Warning: it is important that the runtime associated with the handle remains alive while the file is being used. If the runtime is dropped, any I/O operations on the file will fail.

We tried to enforce this with Rust lifetimes, but sadly Rust async cannot express scoped futures in a safe way, so we need static lifetimes for now. If you’re interested in the details, see this post.

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pub fn with_array_registry(self, registry: Arc<ArrayRegistry>) -> Self

Configure a Vortex array registry.

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pub fn with_layout_registry(self, registry: Arc<LayoutRegistry>) -> Self

Configure a Vortex array registry.

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pub fn with_file_size(self, file_size: u64) -> Self

Configure a known file size.

This helps to prevent an I/O request to discover the size of the file. Of course, all bets are off if you pass an incorrect value.

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pub fn with_dtype(self, dtype: DType) -> Self

Configure a known DType.

If this is provided, then the Vortex file may be opened with fewer I/O requests.

For Vortex files that do not contain a DType, this is required.

Configure a known file layout.

If this is provided, then the Vortex file can be opened without performing any I/O. Once open, the Footer can be accessed via crate::VortexFile::footer.

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pub fn with_metrics(self, metrics: VortexMetrics) -> Self

Configure a custom VortexMetrics.

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pub async fn open<S: IntoReadSource>( self, source: S, ) -> VortexResult<VortexFile>

Open a Vortex file using the provided I/O source.

This is the most common way to open a VortexFile and tends to provide the best out-of-the-box performance. The underlying I/O system will continue to be optimised for different file systems and object stores so we encourage users to use this method whenever possible and file issues if they encounter problems.

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pub fn open_buffer<B: Into<ByteBuffer>>( self, buffer: B, ) -> VortexResult<VortexFile>

Open a Vortex file from an in-memory buffer.

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pub async fn open_read_at<R: VortexReadAt>( self, read: R, ) -> VortexResult<VortexFile>

An API for opening a VortexFile using any VortexReadAt implementation.

This is a low-level API and we strongly recommend using VortexOpenOptions::open.

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impl VortexOpenOptions

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pub async fn open_object_store( self, object_store: &Arc<dyn ObjectStore>, path: &str, ) -> VortexResult<VortexFile>

Trait Implementations§

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impl Default for VortexOpenOptions

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fn default() -> Self

Returns the “default value” for a type. Read more

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