* Describe the issue:

In RHCS 5, we do not have a troubleshooting section for MDS.
In the Filesystem guide[1] we have a section : "Appendix A. Health messages for the Ceph File System"

But this just lists out and defines various Health errors/warnings for MDS.
It does not explain the steps that support/customers should take to address individual issues. Nor do we think it is comprehensive enough to understand the issue. 


[1] https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/5/html/file_system_guide/health-messages-for-the-ceph-file-system_fs


* Suggestions for improvement:

We are looking for a comprehensive document that
- explains all the common issues with MDS/CephFS
- Logs that need to be collected(at what level) for further review
- Steps needed to fix the issue or apply any workaround



* Document URL:

We can either add this as a separate section in 
Filesystem Guide or Troubleshooting Guide