Starting DataStax Enterprise as a stand-alone process
Steps for starting the DataStax Enterprise process when DataStax Enterprise was installed from a tarball with the No Services option.
All nodes types are DataStax Enterprise nodes and run the database.
Considerations for starting a cluster
Be aware of the following when starting a DataStax Enterprise cluster:
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Nodes must be segregated by datacenters
Transactional, DSE Search, DSE Analytics, and
SearchAnalyticsnodes must be in separate datacenters. For example, in a cluster with both DSE Search and transactional nodes, all DSE Search nodes must be in a one or more search datacenters and all transactional nodes must be in one or more datacenters.DSE Graph must be enabled on all nodes in a datacenter. It no longer has to be enabled on the entire cluster.
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Deploying a mixed-workload cluster
When deploying one or more datacenters for each type of node, first determine which nodes to start as transactional, analytic, DSE Graph only, DSE Graph plus other types, DSE Search, and
SearchAnalyticsnodes. Deploy in this order:-
Analytic seed nodes.
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Transactional or DSE Graph only seed nodes.
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DSE Search seed nodes.
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SearchAnalyticsnodes. -
Remaining nodes one at a time. See Initializing multiple datacenters per workload type.
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DSE Analytics nodes
Before starting DSE Analytics nodes, ensure that the replication factor is configured correctly for the analytics keyspaces. Every time you add a new datacenter, you must manually increase the replication factor of the
dse_leaseskeyspace for the new DSE Analytics datacenter.
Startup commands
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Start the node from the
<installation_location>. -
Set the type.
Startup commands Node/datacenter Command Transactional only
$ bin/dse cassandraDSE Graph
$ bin/dse cassandra -gDSE Analytics with Spark
$ bin/dse cassandra -kDSE Search
$ bin/dse cassandra -s
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When multiple flags are used, list them separately on the command line.
For example, ensure there is a space between |
| Node type | Settings |
|---|---|
From the |
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Spark Analytics, DSE Graph, and DSE Search node |
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BYOS (Bring Your Own Spark) Spark nodes run in separate Spark cluster from a vendor other than DataStax. |
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DSE Graph and BYOS |
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Prerequisites
Be sure to read the Considerations for starting a cluster.
You can also use OpsCenter to start and stop nodes.
Procedure
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If DataStax Enterprise is running, stop the node.
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From the install directory, start the node. For example, to set a Spark node:
$ bin/dse cassandra -k -
To check that your ring is up and running:
$ cd <installation_location> $ bin/nodetool statuswhere the
<installation_location>is either:-
/usr/share/dse -
the directory where you installed DataStax Enterprise.
If the cluster has problems starting, look for starting DSE troubleshooting and other articles in the Support Knowledge Center.
The
nodetoolcommand shows the node type and the status. For a transactional node running in a normal state (UN) with virtual nodes (vnodes) enabled shows:Datacenter: Cassandra ===================== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host ID Rack UN 127.0.0.1 82.43 KB 128 ? 40725dc8-7843-43ae-9c98-7c532b1f517e rack1For example, a running node in a normal state (UN) with DSE Analytics without vnodes enabled shows:
Datacenter: Analytics ===================== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Owns Host ID Token Rack UN 172.16.222.136 103.24 KB ? 3c1d0657-0990-4f78-a3c0-3e0c37fc3a06 1647352612226902707 rack1
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