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Master/standby: Each master/standby instance runs on two nodes (one master and one standby). The standby node replicates data synchronously from the master node. If the master node fails, the standby node automatically becomes the master node.
(rsmd.getColumnLabel(i) + " " + rsmd.getColumnName(i)); } Parent topic: Typical Application Development Examples
If there are no client nodes in the cluster, data nodes will need to additionally handle cluster access and data analytics requests; if there are no master nodes, data nodes will need to provide cluster management. Master nodes (ess-master): optional.
Table 1 Maximum and minimum numbers of nodes in an Elasticsearch or OpenSearch cluster Node Type Limit Data nodes Mandatory node type. Max: 200 with master nodes 32 without master nodes Min: 1 Master nodes Optional node type. Max: 9 Min: 3 The quantity must be an odd number.
device.get_client().set_command_listener(CommandSampleListener(device)) if device.connect() !
Go to the client decompression path FusionInsight_Cluster_1_Services_ClientConfig\Hive\config and manually import the configuration file to the configuration file directory (usually the resources folder) of the Hive sample project.
Using AOM to Monitor Hosts Hosts include the Elastic Cloud Server (ECS) and Bare Metal Server (BMS). AOM can monitor the hosts purchased during CCE and ServiceStage cluster creation as well as those purchased in non-CCE and -ServiceStage environments.
(rsmd.getColumnLabel(i) + " " + rsmd.getColumnName(i)); } Parent topic: Typical Application Development Examples
Response Parameters Status Code: 200 OK Parameter Type Description deviceId String(256) Uniquely identifies a device. The value of this parameter is allocated by the IoT platform during device registration. psk String(32) Indicates a random PSK.
Only letters (case-sensitive), digits, underscores (_), hyphens (-), and periods (.) are allowed. It cannot start with hyphens (-) or periods (.) Default Value N/A unit String Definition Rack U space. Constraints N/A Range Maximum length: 128 characters.
Figure 3 HA among master and standby nodes within an AZ Cross-AZ DR Within a Region The master and standby nodes of a DCS instance (single-node type not included) can be deployed across AZs (in different equipment rooms).
DROP LANGUAGE DROP MASKING POLICY DROP MATERIALIZED VIEW DROP MODEL DROP NODE DROP NODE GROUP DROP OWNED DROP PACKAGE DROP PROCEDURE DROP RESOURCE LABEL DROP RESOURCE POOL DROP ROLE DROP ROW LEVEL SECURITY POLICY DROP SCHEMA DROP SECURITY LABEL DROP SEQUENCE DROP SERVER DROP SLICEGROUP
(rsmd.getColumnLabel(i) + " " + rsmd.getColumnName(i)); } Application Lossless Transparent (ALT) Planned ALT During planned maintenance (such as restarting database instances, performing a switchover, restarting nodes, and restarting DNs), JDBC and DNs are disconnected.
Error Codes (ICSError) This section describes details about the error codes (IcsError) reported on the client of the web SDK. Table 1 Error code description Error Code Error Description Error Cause or Handling Suggestion 20010001 Invalid characters in the name.
Preparing for Hive Development and Operating Environment Preparing Development Environment Hive applications can be developed by using the Java (JDBC and HCatalog), Python, Python 3 API. The following table describes the development and operating environment to be prepared.
), digits, underscores (_), and hyphens (-).
), digits, underscores (_), and hyphens (-).
(Optional) Modify the C:\uniagentd\conf\uniagentd.conf file and enter the following configuration (this step is required only when you need to install UniAgent 1.1.3 or earlier): master=https://xxxxxx.xxxxxxxxxxx,https://xx.xx.xx.xx:xxxxx project_id=xxxxxxxxxxxxxx public_net=xxxx
Figure 12 Selecting observability add-ons Table 12 Observability add-ons Add-on Description Cloud Native Cluster Monitoring (Optional) After you select this add-on, CCE will automatically install it.
/usr/sbin/ntpdate IP address of the active Master node Start the NTP service. service ntpd start Or systemctl restart ntpd Run the ntpstat command to check the time synchronization result. ntpstat The command output is as follows: synchronised to NTP server (xxx) at stratum 2 time
