Document URL: https://docs.openshift.com/container-platform/4.2/scalability_and_performance/optimizing-storage.html Section Number and Name: 4.2/scalability_and_performance/optimizing-storage Describe the issue: I have a production OCP4 env on RHOS that I'm planning, and I want to make sure my etcd database has the necessary storage configuration to sustain a large cluster. In the documentation linked above, it says, "the lowest consistent latency storage technology is preferable", which is kind of ambiguous. In my case, I've tried using ceph and it ended up not being fast enough so we're now going with local ssd. Suggestions for improvement: Requesting that we add etcd storage reference architecture, suggested etcd storage solutions, and/or storage performance requirements/tests we can run to evaluate our etcd storage solution. Additional information:
etcd speed (SSD/NVME, no networked storage, no spinning disk), size and monitoring recommendations have been improved in 4.6. We recommend monitoring etcd_server_quota_backend_bytes which is the current quota limit etcd_mvcc_db_total_size_in_use_in_bytes which indicates the actual database usage after a history compaction etcd_debugging_mvcc_db_total_size_in_bytes See https://docs.openshift.com/container-platform/4.6/scalability_and_performance/recommended-host-practices.html#recommended-etcd-practices_
Maybe a link from [1] to [2] would be helpful to easily find the additional information regarding the disks recommendations for etcd. [1] https://docs.openshift.com/container-platform/4.6/scalability_and_performance/optimizing-storage.html#other-specific-application-storage-recommendations [2] https://docs.openshift.com/container-platform/4.6/scalability_and_performance/recommended-host-practices.html#recommended-etcd-practices_
+1 to suggestion by @oarribas. Thanks.
@kfryklun @oarribas Review this PR that provides a link to etcd storage recommendations. Thanks. https://github.com/openshift/openshift-docs/pull/43626
@oarribas @mifiedle I left a review request for the BZ in https://github.com/openshift/openshift-docs/pull/43626. Thank you!
Approved in PR, waiting for it to merge
An additional change was made to the content, per the peer review, and the review request is out for Dev and QE verification. The PR link is here for more information: https://github.com/openshift/openshift-docs/pull/43626
PR merged.
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days