Bug 1477249

Summary: [Doc-RFE] Document multiple active MDS for CephFS
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Anjana Suparna Sriram <asriram>
Component: DocumentationAssignee: Bara Ancincova <bancinco>
Status: CLOSED CURRENTRELEASE QA Contact: Ramakrishnan Periyasamy <rperiyas>
Severity: unspecified Docs Contact:
Priority: high    
Version: 3.0CC: anharris, hnallurv, kdreyer, pdonnell
Target Milestone: rcKeywords: Documentation, FutureFeature
Target Release: 3.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-12-26 03:41:18 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1477276    
Bug Blocks:    

Description Anjana Suparna Sriram 2017-08-01 14:50:01 UTC 
Additional info: 

RHCS 3.0 Content Plan:
https://docs.google.com/document/d/1fp1j6iPr9UPHCMWqqS8QG3SXiSQ3n9Y9a1YogivhtzA/edit
Comment 8 Patrick Donnelly 2017-08-23 20:30:28 UTC 
"By default, Ceph File System uses only one active MDS daemon. However, you can configure multiple active MDS daemons to scale metadata performance for large systems. The active MDS daemons will share the metadata workload with one another. Typically, systems with many clients benefit from multiple active MDS daemons. Note that systems with multiple active MDS daemons still require standby MDS daemon to remain high available."

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"By default, a Ceph File System uses only one active MDS daemon. However, you can configure the file system to use multiple active MDS daemons to scale metadata performance for larger workloads. The active MDS daemons will share the metadata workload with one another dynamically as metadata load patterns change. Typically, systems with many clients will benefit from multiple active MDS daemons. Note that systems with multiple active MDS daemons still require standby MDS daemons to remain highly available."
Comment 10 Ramakrishnan Periyasamy 2017-10-06 04:42:44 UTC 
Not closing this bug for now, I have tests which covers some command part of the doc, will check those and close this soon.
Comment 11 Ramakrishnan Periyasamy 2017-10-13 13:36:54 UTC 
Doc looks good, Moving this bug to verified state.