Enum ChunkProfile 

pub enum ChunkProfile {
    Single,
    Dup,
    Raid0,
    Raid1,
    Raid10,
    Raid5,
    Raid6,
}

RAID profile derived from a chunk’s chunk_type flags.

RAID1 covers all mirrored profiles (RAID1, RAID1C3, RAID1C4) since they share the same routing math (every stripe gets the same bytes). The number of mirrors is given by ChunkMapping::num_stripes.

Variants

Single

No replication, no striping. One stripe, written/read whole.

Dup

Two copies on the same device (mostly used for metadata on single-device filesystems). Both stripes get the same bytes.

Raid0

Striped across devices, no redundancy. Each row of stripe_len bytes lands on a single device; consecutive rows round-robin.

Raid1

Mirrored across N devices (num_stripes = 2/3/4 for RAID1 / RAID1C3 / RAID1C4). Every stripe gets the same bytes.

Raid10

Striped mirrors. num_stripes / sub_stripes data groups, each mirrored sub_stripes-ways (always 2 in practice).

Raid5

Striped with parity (single parity device). Not yet handled.

Raid6

Striped with double parity. Not yet handled.

Implementations

impl ChunkProfile

pub fn from_chunk_type(chunk_type: u64) -> Self

Decode the RAID profile bits of an on-disk chunk_type field.

SINGLE is the absence of any profile bit. The data/metadata/system bits are ignored — only the RAID profile bits matter for routing.

Trait Implementations

impl Clone for ChunkProfile

fn clone(&self) -> ChunkProfile

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChunkProfile

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

Formats the value using the given formatter.

impl PartialEq for ChunkProfile

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ChunkProfile

impl Eq for ChunkProfile

impl StructuralPartialEq for ChunkProfile