You can mount these volumes as devices on your Amazon EC2 instances. You can mount multiple volumes on the same instance, but each volume can be attached to only one instance at a time.
After you deploy a Ceph cluster, you will probably need to Detail data storage user guide several modifications to it occasionally.
These include adding or removing new nodes, disks, or services. This chapter describes how you can achieve these administration tasks.
Verify that it has a proper connection to both public and cluster networks, and that time synchronization is correctly configured. Then install the salt-minion package: Run the preparation stage. It synchronizes modules and grains so that the new minion can provide all the information DeepSea expects.
Run the discovery stage. Run the configuration stage. To add a new service to an existing node, follow these steps: Running both stages does not hurt.
Tip When adding an OSD to the existing cluster, bear in mind that the cluster will be rebalancing for some time afterward. To minimize the rebalancing periods, we recommend adding all the OSDs you intend to add at the same time. Removing OSDs from Your Cluster In case you need to remove a particular OSD node from your cluster, ensure that your cluster has more free disk space than the disk you intend to remove.
Bear in mind that removing an OSD results in rebalancing of the whole cluster. When a role is removed from a minion, the objective is to undo all changes related to that role.
For most of the roles, the task is simple, but there may be problems with package dependencies. If a package is uninstalled, its dependencies are not. Removed OSDs appear as blank drives. The related tasks overwrite the beginning of the file systems and remove backup partitions in addition to wiping the partition tables.
Preserving Partitions Created by Other Methods Disk drives previously configured by other methods, such as ceph-deploy, may still contain partitions. DeepSea will not automatically destroy these.
The administrator must reclaim these drives manually. Removing a Salt minion from the Cluster If your storage minions are named, for example, 'data1. Migrating Nodes Assume the following situation: Now the permanent hardware has arrived for the gateway and you can finally assign the intended role to the backup storage node and have the gateway role removed.
If the node data8 needs the Object Gateway role removed and the storage role added, and the current policy. Stage 3 will add data8 as a storage node.
For a moment, data8 will have both roles. Stage 4 will add the Object Gateway role to rgw1 and Stage 5 will remove the Object Gateway role from data8. If a monitor node fails, and as a result your cluster has only two monitor nodes only, you need to temporarily assign the monitor role to other cluster nodes before you redeploy the failed monitor nodes.
After you redeploy the failed monitor nodes, you can uninstall the temporary monitor roles. There are two basic degrees of a Ceph node failure: In such case, follow these steps: After the disk is empty, add the disk to the YAML file of the node.
After saving the file, run DeepSea stages 2 and 3: To let DeepSea create new profiles, the existing profiles need to be moved: For example, from osd. Removing osd 20 from Ceph 1. In such case, you need to force the OSD removal. You need to upgrade the OSD disk, for example to increase its size.
The replacement procedure is the same for both cases. The Number of Free Disks When doing an automated OSDs replacement, the number of free disks needs to be the same as the number of disks you need to replace.
If there are more free disks available in the system, it is impossible to guess which free disks to replace.The HDFS Architecture Guide describes HDFS in detail. This user guide primarily deals with the interaction of users and administrators with HDFS clusters.
The HDFS architecture diagram depicts basic interactions among NameNode, the DataNodes, and the clients. User Guide. Welcome to the Azure Databricks User Guide. Here you will find the key topics that you need to be successful with Azure Databricks. The AWS Free Tier enables you to gain free, hands-on experience with the AWS platform, products, and services.
AWS Free Tier Details.
1 5 active users per month** 50 GB-month of storage per month** 10, Git requests per month** Amazon CloudWatch. CRI Archival Data Storage USER GUIDE OVERVIEW The CRI offers a storage service to BSD labs, called Archive Storage, designed for long-term storage of research datasets.
This service is available only to users with existing labshares and must be. Getting Started.
EMC Atmos™ web 1 services application programming interface (API) can be used to connect to AT&T Cloud Storage allowing application developers to enable a customized commodity storage system over the Internet or over AT&T VPN.
API Keys are used to authenticate you and direct your data to the container owned by you in the Storage 'cloud'. The device will begin collecting data when the selected start time elapses and will continue to collect data until the stop time occurs (if selected), the battery is depleted, or the .