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

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Injection

Earlier in this chapter we discussed Ceph settings defined in the ceph.conf config file. When present as each Ceph daemon starts up, these settings override compiled-in defaults. To borrow a term from the network router world, ceph.conf is an example of stored, startup or saved config. As circumstances cause us to adjust or augment these explicit file-based settings we can effect them by rolling restarts of Ceph daemon processes or even server reboots.

While Ceph's resilient and fault-tolerant architecture affords us the flexibility to carefully apply configuration changes by service restarts, there is faster and less disruptive method: injection.

Ceph's injection mechanism is a handy and nearly immediate way to affect Ceph's ...

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