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Quick reference for zookeeper commands

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Rajkumar Asohan, PMP
Rajkumar Asohan, PMP

This document provides syntax examples for common operations using ZooKeeper like creating znodes, getting and setting znode data, creating children, listing children, checking znode status, and removing znodes. The operations covered include creating standard, sequential, and ephemeral znodes, getting and watching znode data, setting znode data, creating child znodes, listing child znodes, getting znode status, and removing znodes. Examples are given for each operation syntax.

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Create Znodes ============= Syntax ------ create /path /data create -s /path /data create -e /path /data Ex -- create /FirstZnode "Myfirstzookeeper-app" create -s /FirstZnode "second-data" create -e /SecondZnode "Ephemeral-data" -------------------------------------------------------------------------------- ------------------------------------------------------ Get Data of a znode =================== Syntax ------ get /path Ex -- get /FirstZnode get /FirstZnode0000000003 -------------------------------------------------------------------------------- ------------------------------------------------------ Watch Znode for Changes ======================= Syntax ------ get /path [watch] 1 Ex -- get /FirstZnode 1 -------------------------------------------------------------------------------- ------------------------------------------------------ Set Data of a znode =================== Syntax ------ set /path /data Ex -- set /SecondZnode "Data-updated" set /FirstZnode "Mysecondzookeeper-app" -------------------------------------------------------------------------------- ------------------------------------------------------ Create Children of a znode ========================== Syntax ------ create /parent/path/subnode/path /data Ex -- create /FirstZnode/Child1 "firstchildren" create /FirstZnode/Child2 "secondchildren" -------------------------------------------------------------------------------- ------------------------------------------------------ List children of a znode
======================== Syntax ------ ls /path Ex -- ls /FirstZnode -------------------------------------------------------------------------------- ------------------------------------------------------ Check Status of a znode ======================= Syntax ------ stat /path Ex -- stat /FirstZnode -------------------------------------------------------------------------------- ------------------------------------------------------ Remove / Delete a znode ======================= Syntax ------ rmr /path delete /path Ex -- rmr /FirstZnode delete /FirstZnode Verification ------------ get /FirstZnode

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Quick reference for zookeeper commands

  • 1. Create Znodes ============= Syntax ------ create /path /data create -s /path /data create -e /path /data Ex -- create /FirstZnode "Myfirstzookeeper-app" create -s /FirstZnode "second-data" create -e /SecondZnode "Ephemeral-data" -------------------------------------------------------------------------------- ------------------------------------------------------ Get Data of a znode =================== Syntax ------ get /path Ex -- get /FirstZnode get /FirstZnode0000000003 -------------------------------------------------------------------------------- ------------------------------------------------------ Watch Znode for Changes ======================= Syntax ------ get /path [watch] 1 Ex -- get /FirstZnode 1 -------------------------------------------------------------------------------- ------------------------------------------------------ Set Data of a znode =================== Syntax ------ set /path /data Ex -- set /SecondZnode "Data-updated" set /FirstZnode "Mysecondzookeeper-app" -------------------------------------------------------------------------------- ------------------------------------------------------ Create Children of a znode ========================== Syntax ------ create /parent/path/subnode/path /data Ex -- create /FirstZnode/Child1 "firstchildren" create /FirstZnode/Child2 "secondchildren" -------------------------------------------------------------------------------- ------------------------------------------------------ List children of a znode
  • 2. ======================== Syntax ------ ls /path Ex -- ls /FirstZnode -------------------------------------------------------------------------------- ------------------------------------------------------ Check Status of a znode ======================= Syntax ------ stat /path Ex -- stat /FirstZnode -------------------------------------------------------------------------------- ------------------------------------------------------ Remove / Delete a znode ======================= Syntax ------ rmr /path delete /path Ex -- rmr /FirstZnode delete /FirstZnode Verification ------------ get /FirstZnode