large-scale/doc/source/journey/ceph.rst

Large Scale SIG/CephAndOpenStack

Ceph is often used in combination with OpenStack, which raises a number of questions when scaling.

FAQ

Q: Is it better to have a single large Ceph cluster for a given datacenter or availability zone, or multiple smaller clusters to limit the impact in case of failure?

A:

Q: How to optimize Ceph cluster performance when it's composed of high-performance SSD disks and standard HDDs?

A:

Q: Should erasure coding be used to increase resilience ? What's its impact on performance in a VM use case?

A:

Q: How to optimize a Ceph cluster (number of nodes, configration, enabled features...) in large OpenStack clusters (> 100 compute nodes)?

A:

Resources

• https://www.openstack.org/videos/summits/sydney-2017/the-dos-and-donts-for-ceph-and-openstack
• https://www.youtube.com/watch?v=OopRMUYiY5E
• https://www.youtube.com/watch?v=21LF2LC58MM
• https://www.youtube.com/watch?v=0i7ew3XXb7Q