Map database Nebula Graph RC4: support index, docking monitoring system

The RC4 INDEX function on the line, LOOKUP ON to establish an index of data query; RC4-based SPACE provides  rights management and licensing model ACL level. In terms of operation and maintenance, the newNebula Stats Exporter  docking based Grafana and Prometheus monitoring system

Features

• Support INDEX function, CREATE INDEX create the index REBUILD INDEX , rebuild the index on existing data, # 1566 , DROP INDEX delete indexed  # 1776
• New LOOKUP ON , the establishment of index data query # 1705 , when the index, Storage Engine insert performance  # 1738
• Provide SPACE-based user management and permission levels of control,CREATE USER   create users, there are GOD ,  ADMIN, DBA, USER ,  GUEST5 kinds of role permissions. GRANT ROLE  Gives a user a privilege, REVOKE ROLE  revoke permissions assigned to a user, # 1842 ,  # 1873  role and their authority example corresponds to # 1929 , #  1917 , to join in the nebula-graphd.conf  configuration items, restart the service, the authentication to take effect . --enable_authorize=true
• Support TTL, allowing the user to specify automatic data expiration time , # 1584 , # 422 ,  # 1934
• Enhanced  DELETE VERTEXsupports batch delete point, delete operations support hash() , uuid()  function # 1317 , #  1759
• New Job Manager, long-running tasks to manage storage layer. Now it supports flush  and compact . SUBMIT JOB  Job submission,  STOP JOB  pause task, SHOW JOB  return to the Job details, RECOVER JOB will be re-added to the failed task execution queue, # 1424
• GO Query support  BIDIRECT keyword, Bidirectional Traversal   # 1740 , # 1752
• Support the Sampling Reservoir , side returns the specified number of "super spot", when used provided profile storage enable_reservoir_sampling is true open sampling switch , max_edge_returned_per_vertex configure the number of samples  # 1746 , # 1915 
• More support CHARSET and  the COLLATION , SHOW CHARSET, SHOW COLLATION you can view all supported CHARSET and COLLATE  . When you create a Space can set the default CHARSET to  utf8 , the default COLLATEis  utf8_bin # 1709 

 

OLAP Interface

• New Spark butt of example Nebula Graph, # 56

 

Operation and maintenance tool

• Helm simplifies the use of Nebula deployed on the Kubernetes, # 1473
• Add Nebula Stats Exporter , collection and performance monitoring Nebula cluster information to Prometheus, as used Grafana visual components  https://github.com/vesoft-inc/nebula-stats-exporter/pull/2

 

Change

• Due to changes in the structure of storage, RC4 is not compatible commitid43453a0   ( 6 February) the previous version inserted.
• Document Migration to repo https://github.com/vesoft-inc/nebula-docsvesoft-inc/nebula-doc  
• Python Client The Nebula ConnectionPool  initialization delete is_async parameters, Python does not support asynchronous client.

 

RC4 RC3 Upgrade

• First stop service for all machines Nebula

• • Execute scripts / nebula.service stop all in each machine
  • Then confirmed by executing scripts / nebula.service status all process has quit

• In each machine installing the new RPM package (according to the system environment)

• • 获取 package：https://github.com/vesoft-inc/nebula/releases/tag/v1.0.0-rc4
  • Installation package: rpm -Uvh nebula-1.0.0-rc4.el7-5.x86_64.rpm

• Start Nebula

• • All machine to perform scripts / nebula.service start all
  • Confirm normal startup process scripts / nebula.service status all

• Re-import data