Create a Pool in Ceph Storage Cluster

1. How do you make a CEPH pool?
2. What is CEPH pool?
3. How do you check CEPH pools?
4. How do I setup a Ceph cluster?
5. What is PG in CEPH?
6. What is Ceph Placement Group?
7. How do I get rid of my pool CEPH?
8. How does CEPH store data?
9. How does Ceph storage work?
10. How do I know if CEPH is installed?
11. How do I start OSD CEPH?
12. How do I find my Ceph cluster name?

How do you make a CEPH pool?

Create a Pool in Ceph Storage Cluster

1. Create a Pool. To syntax for creating a pool is: ceph osd pool create pool-name pg-num ...
2. Associate Pool to Application. Pools need to be associated with an application before use. ...
3. Doing it from Ceph Dashboard. Login to your Ceph Management Dashboard and create a new Pool – Pools > Create.
4. Delete a Pool.

What is CEPH pool?

Pools are logical partitions for storing objects. When you first deploy a cluster without creating a pool, Ceph uses the default pools for storing data. Resilience: You can set how many OSD are allowed to fail without losing data. ... For replicated pools, it is the desired number of copies/replicas of an object.

How do you check CEPH pools?

10 Commands Every Ceph Administrator Should Know

1. Check or watch cluster health: ceph status || ceph -w. ...
2. Check cluster usage stats: ceph df. ...
3. Check placement group stats: ceph pg dump. ...
4. View the CRUSH map: ceph osd tree. ...
5. Create or remove OSDs: ceph osd create || ceph osd rm. ...
6. Create or delete a storage pool: ceph osd pool create || ceph osd pool delete.

How do I setup a Ceph cluster?

How to build a Ceph Distributed Storage Cluster on CentOS 7

1. Step 1 - Configure All Nodes. Create a Ceph User. Install and Configure NTP. ...
2. Step 2 - Configure the SSH Server.
3. Step 3 - Configure Firewalld.
4. Step 4 - Configure the Ceph OSD Nodes.
5. Step 5 - Build the Ceph Cluster. Install ceph-deploy on the ceph-admin node. Create New Cluster Config. ...
6. Step 6 - Testing the Ceph setup.
7. Reference.

What is PG in CEPH?

Placement Groups (PGs) are invisible to Ceph clients, but they play an important role in Ceph Storage Clusters. A Ceph Storage Cluster may require many thousands of OSDs to reach an exabyte level of storage capacity. Ceph clients store objects in pools, which are a logical subset of the overall cluster.

What is Ceph Placement Group?

A Placement Group (PG) is a logical collection of objects that are replicated on OSDs to provide reliability in a storage system. Depending on the replication level of a Ceph pool, each PG is replicated and distributed on more than one OSD of a Ceph cluster.

How do I get rid of my pool CEPH?

Deleting pools

1. $ ceph tell mon.\* injectargs '--mon-allow-pool-delete=true'
2. ## The following will delete the pool.
3. $ ceph osd pool delete <pool-name> <pool-name> --yes-i-really-really-mean-it.
4. $ ceph tell mon.\* injectargs '--mon-allow-pool-delete=false'

How does CEPH store data?

Pools: Ceph stores data within pools, which are logical groups for storing objects. Pools manage the number of placement groups, the number of replicas, and the CRUSH rule for the pool. To store data in a pool, you must have an authenticated user with permissions for the pool. Ceph can snapshot pools.

How does Ceph storage work?

How does Ceph storage work? Ceph uses Ceph Block Device, a virtual disk that can be attached to bare-metal Linux-based servers or virtual machines. ... The file system uses the same clustered system as Ceph block storage and object storage to store a large amount of data.

How do I know if CEPH is installed?

To check a cluster's status, execute the following:

1. ceph status. Or:
2. ceph -s. In interactive mode, type status and press Enter.
3. ceph> status. Ceph will print the cluster status. For example, a tiny Ceph demonstration cluster with one of each service may print the following:

How do I start OSD CEPH?

To start, stop, or restart all the Ceph daemons, execute the following commands from the local node running the Ceph daemons, and as root :

1. Start All Ceph Daemons # systemctl start ceph.target.
2. Stop All Ceph Daemons # systemctl stop ceph.target.
3. Restart All Ceph Daemons # systemctl restart ceph.target.

How do I find my Ceph cluster name?

To identify the cluster name on the command-line interface, specify the Ceph configuration file with the cluster name, for example, ceph. conf , us-west.
...
The Monitor map requires:

1. The File System Identifier ( fsid )
2. The cluster name, or the default cluster name of ceph is used.
3. At least one host name and its IP address.