Struct hdf5::file::PhaseChangeInfo

pub struct PhaseChangeInfo {
    pub max_list: u32,
    pub min_btree: u32,
}

Threshold values for storage of shared message indexes.

These phase change thresholds determine the point at which the index storage mechanism changes from a more compact list format to a more performance-oriented B-tree format, and vice-versa.

By default, a shared object header message index is initially stored as a compact list. When the number of messages in an index exceeds the threshold value of max_list, storage switches to a B-tree for improved performance. If the number of messages subsequently falls below the min_btree threshold, the index will revert to the list format.

Fields

max_list: u32

Threshold above which storage of a shared object header message index shifts from list to B-tree.

If max_list is set to 0 (zero), shared object header message indexes in the file will be created as B-trees and will never revert to lists.

min_btree: u32

Threshold below which storage of a shared object header message index reverts to list format.

Trait Implementations

impl Clone for PhaseChangeInfo

fn clone(&self) -> PhaseChangeInfo

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PhaseChangeInfo

impl Debug for PhaseChangeInfo

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for PhaseChangeInfo

fn default() -> PhaseChangeInfo

Returns the "default value" for a type.

impl Eq for PhaseChangeInfo

impl PartialEq<PhaseChangeInfo> for PhaseChangeInfo

fn eq(&self, other: &PhaseChangeInfo) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &PhaseChangeInfo) -> bool

This method tests for !=.

impl StructuralEq for PhaseChangeInfo

impl StructuralPartialEq for PhaseChangeInfo