Struct tokio_zookeeper::Stat

pub struct Stat {
    pub czxid: i64,
    pub mzxid: i64,
    pub ctime: i64,
    pub mtime: i64,
    pub version: i32,
    pub cversion: i32,
    pub aversion: i32,
    pub ephemeral_owner: i64,
    pub data_length: i32,
    pub num_children: i32,
    pub pzxid: i64,
}

Statistics about a znode, similar to the UNIX stat structure.

Time in ZooKeeper

The concept of time is tricky in distributed systems. ZooKeeper keeps track of time in a number of ways.

• zxid: Every change to a ZooKeeper cluster receives a stamp in the form of a zxid (ZooKeeper Transaction ID). This exposes the total ordering of all changes to ZooKeeper. Each change will have a unique zxid – if zxid:a is smaller than zxid:b, then the associated change to zxid:a happened before zxid:b.
• Version Numbers: Every change to a znode will cause an increase to one of the version numbers of that node.
• Clock Time: ZooKeeper does not use clock time to make decisions, but it uses it to put timestamps into the Stat structure.

Fields

czxid: i64

The transaction ID that created the znode.

mzxid: i64

The last transaction that modified the znode.

ctime: i64

Milliseconds since epoch when the znode was created.

mtime: i64

Milliseconds since epoch when the znode was last modified.

version: i32

The number of changes to the data of the znode.

cversion: i32

The number of changes to the children of the znode.

aversion: i32

The number of changes to the ACL of the znode.

ephemeral_owner: i64

The session ID of the owner of this znode, if it is an ephemeral entry.

data_length: i32

The length of the data field of the znode.

num_children: i32

The number of children this znode has.

pzxid: i64

The transaction ID that last modified the children of the znode.

Trait Implementations

impl Clone for Stat

fn clone(&self) -> Stat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Stat

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

Formats the value using the given formatter.

impl PartialEq<Stat> for Stat

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

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

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

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

impl Copy for Stat

impl Eq for Stat

impl StructuralEq for Stat

impl StructuralPartialEq for Stat