January 2019
Intermediate to advanced
606 pages
15h 1m
English
book
Ceph: Designing and Implementing Scalable Storage Systems
by Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk
Content preview from Ceph: Designing and Implementing Scalable Storage Systems
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Disaster recovery replication using RBD mirroring
RBD mirroring is an asynchronous replication of RBD images between multiple Ceph clusters. RBD mirroring validates a point-in-time consistent replica of any change to an RBD image, including snapshots, clones, read and write IOPS and block device resizing. RBD mirroring can run in an active+active setup or an active+passive setup. RBD mirroring utilizes the RBD journaling and exclusive lock features which enables the RBD image to record all changes to the image in order of which they occur. These features validate that a crash-consistent copy of the remote image is available locally. Before mirroring can be enabled on a Ceph cluster the journaling feature must be enabled on the RBD image. ...
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