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Description of problem: Some of the users running mongodb on NFS server and syncing data. It takes huge time. mongodb recommends not to use it on NFS. Links: 2.4: https://docs.mongodb.org/v2.4/administration/production-notes/ 2.6: https://docs.mongodb.org/v2.6/administration/production-notes/ MongoDB does not use conventional I/O to access the data files: it uses mmap(). mmap has got issues with nfs. Updating documentation would help users to use mongodb on NFS. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. Use Mongodb on NFS and run content sync 2. 3. Actual results: Expected results: Additional info:
Moving 6.2 bugs out to sat-backlog.
Assigning to Stephen for review. Stephen - I'm not sure if we have a natural place to add this content at the moment, but perhaps it would be a good consideration for the Architecture Guide. What do you think?
Hello Re. the Installation Guide I think we should add this info at the end of the second para in "Storage Recommendations" [1] in the table just above that, for the /var/lib/mongodb entry, it says "For improved performance, use solid state drives (SSD) rather than hard disk drives (HDD)." This bug suggests the warning not to use NFS is more important than that comment about drive technology, so we should add this info in brief to that entry. We should then move that line about SSD vs. HDD to the paragraph below in "Storage Recommendations" to avoid table entry bloat. Re. the Architecture Guide I searched through this guide and storage and file systems are not discussed. The only time MongoDB is mentioned is in the appendix about technical users. [1] https://access.redhat.com/documentation/en/red-hat-satellite/6.2/paged/installation-guide/chapter-2-preparing-your-environment-for-installation#idm140560292399744