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Learning Ceph - Second Edition by Karan Singh, Vaibhav Bhembre, Anthony D'Atri

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New since the first edition

The Jewel LTS release brought a number of significant changes:

  • Unified queue of client I/O, recovery, scrubs, and snapshot trimming
  • Daemons now run as the ceph user, which must be addressed when upgrading
  • Cache tier improvements
  • SHEC erasure coding is no longer experimental
  • The SWIFT API now supports object expiration
  • RBD improvements (now supports suffixes)
  • rbd du shows actual and provisioned usage quickly via object-map and fast-diff features
  • New rbd status command
  • deep-flatten now handles snapshots
  • CephFS snapshots can now be renamed
  • And CephFS is considered stable!
  • Scrubbing improvements
  • TCMalloc improvements
  • Multisite functionality in RGW significantly improved
  • OpenStack Keystone v3 support
  • Swift per-tenant ...

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