W E K A
4.3
4.3
  • WEKA v4.3 documentation
    • Documentation revision history
  • WEKA System Overview
    • WEKA Data Platform introduction
      • WEKA system functionality features
      • Converged WEKA system deployment
      • Optimize redundancy in WEKA deployments
    • SSD capacity management
    • Filesystems, object stores, and filesystem groups
    • WEKA networking
    • Data lifecycle management
    • WEKA client and mount modes
    • WEKA containers architecture overview
    • Glossary
  • Planning and Installation
    • Prerequisites and compatibility
    • WEKA cluster installation on bare metal servers
      • Plan the WEKA system hardware requirements
      • Obtain the WEKA installation packages
      • Install the WEKA cluster using the WMS with WSA
      • Install the WEKA cluster using the WSA
      • Manually install OS and WEKA on servers
      • Manually prepare the system for WEKA configuration
        • Broadcom adapter setup for WEKA system
        • Enable the SR-IOV
      • Configure the WEKA cluster using the WEKA Configurator
      • Manually configure the WEKA cluster using the resource generator
      • Perform post-configuration procedures
      • Add clients to an on-premises WEKA cluster
    • WEKA Cloud Deployment Manager Web (CDM Web) User Guide
    • WEKA Cloud Deployment Manager Local (CDM Local) User Guide
    • WEKA installation on AWS
      • WEKA installation on AWS using Terraform
        • Terraform-AWS-WEKA module description
        • Deployment on AWS using Terraform
        • Required services and supported regions
        • Supported EC2 instance types using Terraform
        • WEKA cluster auto-scaling in AWS
        • Detailed deployment tutorial: WEKA on AWS using Terraform
      • WEKA installation on AWS using the Cloud Formation
        • Self-service portal
        • CloudFormation template generator
        • Deployment types
        • AWS Outposts deployment
        • Supported EC2 instance types using Cloud Formation
        • Add clients to a WEKA cluster on AWS
        • Auto scaling group
        • Troubleshooting
      • Install SMB on AWS
    • WEKA installation on Azure
    • WEKA installation on GCP
      • WEKA project description
      • GCP-WEKA deployment Terraform package description
      • Deployment on GCP using Terraform
      • Required services and supported regions
      • Supported machine types and storage
      • Auto-scale instances in GCP
      • Add clients to a WEKA cluster on GCP
      • Troubleshooting
      • Detailed deployment tutorial: WEKA on GCP using Terraform
      • Google Kubernetes Engine and WEKA over POSIX deployment
  • Getting Started with WEKA
    • Manage the system using the WEKA GUI
    • Manage the system using the WEKA CLI
      • WEKA CLI hierarchy
      • CLI reference guide
    • Run first IOs with WEKA filesystem
    • Getting started with WEKA REST API
    • WEKA REST API and equivalent CLI commands
  • Performance
    • WEKA performance tests
      • Test environment details
  • WEKA Filesystems & Object Stores
    • Manage object stores
      • Manage object stores using the GUI
      • Manage object stores using the CLI
    • Manage filesystem groups
      • Manage filesystem groups using the GUI
      • Manage filesystem groups using the CLI
    • Manage filesystems
      • Manage filesystems using the GUI
      • Manage filesystems using the CLI
    • Attach or detach object store buckets
      • Attach or detach object store bucket using the GUI
      • Attach or detach object store buckets using the CLI
    • Advanced data lifecycle management
      • Advanced time-based policies for data storage location
      • Data management in tiered filesystems
      • Transition between tiered and SSD-only filesystems
      • Manual fetch and release of data
    • Mount filesystems
      • Mount filesystems from Single Client to Multiple Clusters (SCMC)
    • Snapshots
      • Manage snapshots using the GUI
      • Manage snapshots using the CLI
    • Snap-To-Object
      • Manage Snap-To-Object using the GUI
      • Manage Snap-To-Object using the CLI
    • Quota management
      • Manage quotas using the GUI
      • Manage quotas using the CLI
  • Additional Protocols
    • Additional protocol containers
    • Manage the NFS protocol
      • Supported NFS client mount parameters
      • Manage NFS networking using the GUI
      • Manage NFS networking using the CLI
    • Manage the S3 protocol
      • S3 cluster management
        • Manage the S3 service using the GUI
        • Manage the S3 service using the CLI
      • S3 buckets management
        • Manage S3 buckets using the GUI
        • Manage S3 buckets using the CLI
      • S3 users and authentication
        • Manage S3 users and authentication using the CLI
        • Manage S3 service accounts using the CLI
      • S3 rules information lifecycle management (ILM)
        • Manage S3 lifecycle rules using the GUI
        • Manage S3 lifecycle rules using the CLI
      • Audit S3 APIs
        • Configure audit webhook using the GUI
        • Configure audit webhook using the CLI
        • Example: How to use Splunk to audit S3
      • S3 supported APIs and limitations
      • S3 examples using boto3
      • Access S3 using AWS CLI
    • Manage the SMB protocol
      • Manage SMB using the GUI
      • Manage SMB using the CLI
  • Operation Guide
    • Alerts
      • Manage alerts using the GUI
      • Manage alerts using the CLI
      • List of alerts and corrective actions
    • Events
      • Manage events using the GUI
      • Manage events using the CLI
      • List of events
    • Statistics
      • Manage statistics using the GUI
      • Manage statistics using the CLI
      • List of statistics
    • Insights
    • System congestion
    • Security management
      • Obtain authentication tokens
      • KMS management
        • Manage KMS using the GUI
        • Manage KMS using the CLI
      • TLS certificate management
        • Manage the TLS certificate using the GUI
        • Manage the TLS certificate using the CLI
      • CA certificate management
        • Manage the CA certificate using the GUI
        • Manage the CA certificate using the CLI
      • Account lockout threshold policy management
        • Manage the account lockout threshold policy using GUI
        • Manage the account lockout threshold policy using CLI
      • Manage the login banner
        • Manage the login banner using the GUI
        • Manage the login banner using the CLI
      • Manage Cross-Origin Resource Sharing
    • User management
      • Manage users using the GUI
      • Manage users using the CLI
    • Organizations management
      • Manage organizations using the GUI
      • Manage organizations using the CLI
      • Mount authentication for organization filesystems
    • Expand and shrink cluster resources
      • Add a backend server
      • Expand specific resources of a container
      • Shrink a cluster
    • Background tasks
      • Set up a Data Services container for background tasks
      • Manage background tasks using the GUI
      • Manage background tasks using the CLI
    • Upgrade WEKA versions
  • Licensing
    • License overview
    • Classic license
  • Monitor the WEKA Cluster
    • Deploy monitoring tools using the WEKA Management Station (WMS)
    • WEKA Home - The WEKA support cloud
      • Local WEKA Home overview
      • Deploy Local WEKA Home v3.0 or higher
      • Deploy Local WEKA Home v2.x
      • Explore cluster insights and statistics
      • Manage alerts and integrations
      • Enforce security and compliance
      • Optimize support and data management
    • Set up the WEKAmon external monitoring
    • Set up the SnapTool external snapshots manager
  • Support
    • Get support for your WEKA system
    • Diagnostics management
      • Traces management
        • Manage traces using the GUI
        • Manage traces using the CLI
      • Protocols debug level management
        • Manage protocols debug level using the GUI
        • Manage protocols debug level using the CLI
      • Diagnostics data management
  • Best Practice Guides
    • WEKA and Slurm integration
      • Avoid conflicting CPU allocations
    • Storage expansion best practice
  • WEKApod
    • WEKApod Data Platform Appliance overview
    • WEKApod servers overview
    • Rack installation
    • WEKApod initial system setup and configuration
    • WEKApod support process
  • Appendices
    • WEKA CSI Plugin
      • Deployment
      • Storage class configurations
      • Tailor your storage class configuration with mount options
      • Dynamic and static provisioning
      • Launch an application using WEKA as the POD's storage
      • Add SELinux support
      • NFS transport failback
      • Upgrade legacy persistent volumes for capacity enforcement
      • Troubleshooting
    • Convert cluster to multi-container backend
    • Create a client image
    • Update WMS and WSA
    • BIOS tool
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On this page
  • Attachment of a local object store bucket to a filesystem
  • Detachment of a local object store bucket from a filesystem
  • Migration considerations
  • Attach a remote object store bucket
  • Detach a remote object store bucket
  1. WEKA Filesystems & Object Stores

Attach or detach object store buckets

This page describes how to attach or detach object stores buckets to or from filesystems.

Attachment of a local object store bucket to a filesystem

Two local object store buckets can be attached to a filesystem, but only one of the buckets is writable. A local object store bucket is used for both tiering and snapshots. When attaching a new local object store bucket to an already tiered filesystem, the existing local object store bucket becomes read-only, and the new object store bucket is read/write. Multiple local object stores allow a range of use cases, including migration to different object stores, scaling of object store capacity, and increasing the total tiering capacity of filesystems.

When attaching a local object store bucket to a non-tiered filesystem, the filesystem becomes tiered.

Detachment of a local object store bucket from a filesystem

Detaching a local object store bucket from a filesystem migrates the filesystem data residing in the object store bucket to the writable object store bucket (if one exists) or to the SSD.

When detaching, the background task of detaching the object store bucket begins. Detaching can be a long process, depending on the amount of data and the load on the object stores.

Detaching an object store bucket is irreversible. Attaching the same bucket again is considered as re-attaching a new bucket regardless of the data stored in the bucket.

  • Migration to a different object store: When detaching from a filesystem tiered to two local object store buckets, only the read-only object store bucket can be detached. In such cases, the background task copies the relevant data to the writable object store. In addition, the allocated SSD capacity only requires enough SSD capacity for the metadata.

  • Un-tiering a filesystem: Detaching from a filesystem tiered to one object store bucket un-tiers the filesystem and copies the data back to the SSD. The allocated SSD capacity must be at least the total capacity the filesystem uses.

On completion of detaching, the object store bucket does not appear under the filesystem when using the weka fs command. However, it still appears under the object store and can be removed if any other filesystem does not use it. The data in the read-only object store bucket remains in the object store bucket for backup purposes. If this is unnecessary or the reclamation of object store space is required, it is possible to delete the object store bucket.

Before deleting an object store bucket, remember to consider data from another filesystem or data not relevant to the WEKA system on the object store bucket.

Once the migration process is completed, while relevant data is migrated, old snapshots (and old locators) reside on the old object store bucket. To recreate snapshot locators on the new object store bucket, snapshots should be re-uploaded to the (new) bucket.

Migration considerations

When migrating data (using the detach operation), copy only the necessary data (to reduce migration time and capacity). However, you may want to keep snapshots in the old object store bucket.

Migration workflow

The order of the following steps is important.

  1. Attach a new object store bucket (the old object store bucket becomes read-only).

  2. Delete any snapshot that does not need to be migrated. This action keeps the snapshot on the old bucket but does not migrate its data to the new bucket.

  3. Detach the old object store bucket.

If you perform the workflow steps in a different order, the snapshots can be completely deleted from any of the object store buckets. It is also possible that the snapshots are already in a migration process and cannot be deleted until the migration is completed.

Attach a remote object store bucket

One remote object store bucket can be attached to a filesystem. A remote object store bucket is used for backup. Only snapshots are uploaded using Snap-To-Object. The snapshot uploads are incremental to the previous one.

Detach a remote object store bucket

Detaching a remote object store bucket from a filesystem keeps the backup data within the bucket intact. It is still possible to use these snapshots for recovery.

Related topics

Background tasks

Snap-To-Object

Attach or detach object store bucket using the GUI

Attach or detach object store buckets using the CLI

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Last updated 5 months ago