Percona Server Mongodb DocumentationThe table below shows all limitations of the MongoDB service that are the result of issues in DC/OS in JIRA or the DC/OS SDK in Github.
| Limitation | Description | Bugs |
|---|---|---|
| Automated MongoDB Backups not yet supported | Automation of MongoDB backups is not yet supported. This feature is coming soon. | |
| DC/OS Secret Store is not supported | DC/OS Secret Store support for keys and passwords is blocked by DCOS_OSS-2326. | https://jira.mesosphere.com/browse/DCOS_OSS-2326 |
| Support Region/Zone awareness for Replica Sets | Currently regions/zones are unsupported. | |
| Cannot set WiredTiger cache size | Currently WiredTiger uses default cache sizing; in most cases this is 50% of memory. | |
| Config: Memory swapiness | Currently the framework is unable to set Virtual Memory swapiness to a recommended value for MongoDB. | |
| Config: XFS Formatting | Currently the framework is unable to enforce an XFS-based filesystem for storing MongoDB data. We strongly recommend WiredTiger-based installations (the default) run on DC/OS agent nodes using the XFS filesystem only! We also suggest taht you avoid the EXT3 filesystem, due to poor performance. | |
| Config: Transparent HugePages | Currently the framework is unable to set Transparent HugePages (RedHat/Fedora/CentOS-only) to a recommended value for MongoDB. We recommend disabling THP entirely on DC/OS agent nodes running this framework! |