ZNode 数据模型

  czxid           = 0x2
  mzxid           = 0x2
  pzxid           = 0x2
  version         = 0
  cversion        = 0
  aversion        = 0
  numChildren     = 0
  dataLength      = 5
  ephemeralOwner  = 0x0

  set /p 新数据             → /p 的变化: {'mzxid': '0x2→0x3', 'version': '0→1', 'dataLength': '5→10', 'mtime': '1790816773889→1790816773896'}
  创建子节点 /p/c             → /p 的变化: {'pzxid': '0x2→0x4', 'cversion': '0→1', 'numChildren': '0→1'}
  再创建 /p/d               → /p 的变化: {'pzxid': '0x4→0x5', 'cversion': '1→2', 'numChildren': '1→2'}
  修改子节点数据 /p/c           → /p 的变化: (无变化)
  删除子节点 /p/d             → /p 的变化: {'pzxid': '0x5→0x7', 'cversion': '2→3', 'numChildren': '2→1'}
  setACL /p              → /p 的变化: {'aversion': '0→1'}
  子节点 /p/c 的 stat(它没被 /p 的操作影响): {'czxid': 4, 'mzxid': 6, 'version': 1, 'cversion': 0, 'numChildren': 0}

  /p 的 ctime = 1790816773889、mtime = 1790816773896(毫秒);与本机时间差:21 ms(同一台机器)

  create '/ok'            → Created /ok
  create '/中文'            → Created /中文
  create '/a/'            → Path must not end with / character
  create '//a'            → Invalid path string "//a" caused by empty node name specified @1
  create '/a//b'          → Invalid path string "/a//b" caused by empty node name specified @3
  create '/.'             → Invalid path string "/." caused by relative paths not allowed @1
  create '/a/./b'         → Invalid path string "/a/./b" caused by relative paths not allowed @3
  create '/a/../b'        → Invalid path string "/a/../b" caused by relative paths not allowed @4
  create 'noslash'        → Path must start with / character
  create '/zookeeper/x'   → Created /zookeeper/x
  create '/a/b'           → Node does not exist: /a/b