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KernelStorage

sochdb_kernel::kernel_api

Trait KernelStorage 

Source 
pub trait KernelStorage: Send + Sync {
    // Required methods
    fn read_page(&self, page_id: PageId) -> KernelResult<Vec<u8>>;
    fn write_page(
        &self,
        page_id: PageId,
        data: &[u8],
    ) -> KernelResult<LogSequenceNumber>;
    fn allocate_page(&self) -> KernelResult<PageId>;
    fn free_page(&self, page_id: PageId) -> KernelResult<()>;
    fn sync(&self) -> KernelResult<()>;
    fn durable_lsn(&self) -> LogSequenceNumber;
}
Expand description

Core storage operations

This trait provides the minimal storage interface that all storage backends must implement.

Required Methods§

Source

fn read_page(&self, page_id: PageId) -> KernelResult<Vec<u8>>

Read a page from storage

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fn write_page( &self, page_id: PageId, data: &[u8], ) -> KernelResult<LogSequenceNumber>

Write a page to storage

Returns the LSN of the write operation for WAL tracking

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fn allocate_page(&self) -> KernelResult<PageId>

Allocate a new page

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fn free_page(&self, page_id: PageId) -> KernelResult<()>

Free a page

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fn sync(&self) -> KernelResult<()>

Sync all pending writes to durable storage

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fn durable_lsn(&self) -> LogSequenceNumber

Get the current durable LSN (all writes up to this LSN are on disk)

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§