Create a Storage Node Pool
Once you have created your Administration process, you can create a Storage Node
Pool. This pool is used to contain all the Storage Nodes in your data store. A
Storage Node pool is used for resource distribution when creating or modifying a
data store. You use the pool create
command to create this pool,
then you join Storage Nodes to the pool using the pool join
command.
Note that a default pool called AllStorageNodes
will be
created automatically and all SNs will be added to it during the topology deployment
process. Therefore, the pool
commands are optional if you use the
AllStorageNodes
pool as the default pool during deployment. You
may have multiple kinds of Storage Nodes in different zones that vary by processor
type, speed and/or disk capacity. So the Storage Node pool lets you define a logical
grouping of Storage Nodes by whatever specification you pick.
Note:
This section is only to demonstrate how to explicitly create a Storage Node pool. Skip this section if you want to use the default poolAllStorageNodes
during the topology deployment process.
Remember that you already have a Storage Node created. You did that in the previous
step where you used the deploy-sn
command to deploy the Storage
Node. Therefore, after you add the pool, you can immediately join that first Storage
Node to the pool.
The pool create
command only requires you to provide the name of the pool.
The pool join
command requires the name of the pool to which you want to join the Storage Node, and the Storage Node's ID. You can obtain the Storage Node's ID using the show topology
command.
For example:
kv-> pool create -name BostonPool
Added pool BostonPool
kv-> show topology
store=mystore numPartitions=0 sequence=2
zn: id=zn1 name=Boston repFactor=1 type=PRIMARY
allowArbiters=false masterAffinity=false
sn=[sn1] zn:[id=zn1 name=Boston] <hostname>:5000 capacity=1 RUNNING
kv-> pool join -name BostonPool -sn sn1
Added Storage Node(s) [sn1] to pool BostonPool