Struct SstPartitionerFactory 

pub struct SstPartitionerFactory { /* private fields */ }

A factory RocksDB asks for a partitioner at the start of every compaction.

Install one with Options::set_sst_partitioner_factory. The setter copies the underlying shared_ptr, so a factory can be installed on any number of Options and dropped as soon as the last call returns.

Implementations

impl SstPartitionerFactory

pub fn fixed_prefix(prefix_len: usize) -> Self

Cuts a new SST file whenever the first prefix_len bytes of the user key change.

Keys shorter than prefix_len are compared whole, so a short key only groups with keys that share all of it. prefix_len of 0 makes every key compare equal and never forces a cut, which is the same as installing no partitioner.

The comparison is over raw bytes of the user key and ignores the column family comparator, so this is a fit for fixed width prefixes such as a tenant id, not for prefixes an application defines through a SliceTransform.

Wraps NewSstPartitionerFixedPrefixFactory.

Trait Implementations

impl Drop for SstPartitionerFactory

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Send for SstPartitionerFactory

impl Sync for SstPartitionerFactory