Enum MutationV62 

pub enum MutationV62 {
    ObjectStore(ObjectStoreMutationV62),
    EncryptedObjectStore(Box<[u8]>),
    Allocator(AllocatorMutationV32),
    BeginFlush,
    EndFlush(u64),
    DeleteVolume,
    UpdateMutationsKey(UpdateMutationsKey),
    CreateInternalDir(u64),
    UpdateBorrowed(u64),
}

Variants

ObjectStore(ObjectStoreMutationV62)

EncryptedObjectStore(Box<[u8]>)

Allocator(AllocatorMutationV32)

BeginFlush

Indicates the beginning of a flush. This would typically involve sealing a tree.

EndFlush(u64)

Indicates the end of a flush. This would typically involve replacing the immutable layers with compacted ones. The u64 records the child store’s new flushed layer borrowing (store_borrowed, or 0 for full compactions and system objects).

DeleteVolume

Volume has been deleted. Requires we remove it from the set of managed ObjectStore.

UpdateMutationsKey(UpdateMutationsKey)

CreateInternalDir(u64)

UpdateBorrowed(u64)

Legacy < V61 mutation only produced in memory when migrating MutationV59 during journal replay (#[serde(skip)] prevents serializing or deserializing this variant in V61+ streams). This can be removed once all < V61 versions are removed; it must remain the last variant so that the serialized variant tags of the preceding variants do not change when it is removed.

Implementations

impl MutationV62

pub fn insert_object(key: ObjectKey, value: ObjectValue) -> Self

pub fn replace_or_insert_object(key: ObjectKey, value: ObjectValue) -> Self

pub fn merge_object(key: ObjectKey, value: ObjectValue) -> Self

pub fn update_mutations_key(key: FxfsKey) -> Self

pub fn counts_towards_object_journal_usage(&self) -> bool

Returns true if this mutation’s serialized journal bytes should be accounted against the target object’s per-store journal usage (J_S) rather than system journal usage (J_sys).

Lifecycle control records (BeginFlush, EndFlush, and DeleteVolume) are not written into an object store’s layer files, and BeginFlush/EndFlush are committed in Borrowed transactions where apply_mutation transitions journal_checkpoints and store_borrowed before post-transaction usage accounting runs. Accounting their bytes in J_sys ensures they do not re-dirty journal_checkpoints or add post-flush borrowed debt to store_borrowed.

Trait Implementations

impl Clone for MutationV62

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MutationV62

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MutationV62

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for MutationV62

impl From<MutationV56> for MutationV62

fn from(item: MutationV56) -> Self

Converts to this type from the input type.

impl From<MutationV57> for MutationV62

fn from(item: MutationV57) -> Self

Converts to this type from the input type.

impl From<MutationV59> for MutationV62

fn from(item: MutationV59) -> Self

Converts to this type from the input type.

impl From<MutationV61> for MutationV62

fn from(from: MutationV61) -> Self

Converts to this type from the input type.

impl Ord for MutationV62

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

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

Restrict a value to a certain range.

impl PartialEq for MutationV62

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for MutationV62

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for MutationV62

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MutationV62

impl TypeFingerprint for MutationV62

fn fingerprint() -> String

impl Versioned for MutationV62

fn max_serialized_size() -> Option<u64>

Maximum size of a serialized version of this type. Serialization and deserialization will fail if the limit is exceeded. If None, there is no limit. None is preferred over u64::MAX because serializing and deserializing with a limit has runtime overhead.

fn deserialize_from<R>(reader: &mut R, _version: Version) -> Result<Self>

where R: Read + ?Sized, for<'de> Self: Deserialize<'de>,

fn serialize_into<W>(&self, writer: &mut W) -> Result<()>

where W: Write, Self: Serialize,

impl VersionedLatest for MutationV62

fn deserialize_from_version<R>(reader: &mut R, version: Version) -> Result<Self>

where R: Read, Self: Sized,

Deserializes from a given version format and upgrades to the latest version.

fn deserialize_with_version<R>(reader: &mut R) -> Result<(Self, Version)>

where R: Read, Self: Sized,

Like deserialize_from_version but reads Version from reader first, then uses it to deserialize self.

fn serialize_with_version<W>(&self, writer: &mut W) -> Result<()>

where W: Write, Self: Sized,

Like serialize_into but serialized Version first, then self.