[Backlogmanager] [FIWARE-JIRA] (HELP-16179) [fiware-stackoverflow] Enable MongoDB sharding for FIWARE Orion ContextBroker

[Fernando Lopez (JIRA)]

     [ https://jira.fiware.org/browse/HELP-16179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando Lopez updated HELP-16179:
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    Status: In Progress  (was: Open)

> [fiware-stackoverflow] Enable MongoDB sharding for FIWARE Orion ContextBroker
> -----------------------------------------------------------------------------
>
>                 Key: HELP-16179
>                 URL: https://jira.fiware.org/browse/HELP-16179
>             Project: Help-Desk
>          Issue Type: Monitor
>          Components: FIWARE-TECH-HELP
>            Reporter: Backlog Manager
>            Assignee: Fermín Galán
>              Labels: fiware, fiware-orion, mongodb
>
> Created question in FIWARE Q/A platform on 24-09-2019 at 13:09
> {color: red}Please, ANSWER this question AT{color} https://stackoverflow.com/questions/58079389/enable-mongodb-sharding-for-fiware-orion-contextbroker
> +Question:+
> Enable MongoDB sharding for FIWARE Orion ContextBroker
> +Description:+
> I am trying to setup MongoDB sharding for the Orion ContextBroker, and IotAgent-Json, I am able to distribute the device provisioning and service data in MongoDb between shards, but whenever i sends the actual device data it gives following error:
>   {
>       "name": "ENTITY_GENERIC_ERROR",
>       "message": "Error accesing entity data for device: DeviceEntity1 of type: DeviceEntity1"}
> I am using following command to shard the collection:
> sh.shardCollection("orion.entities",{"_id.servicePath": 1, "_id.id": 1, "_id.type": 1})
> Intercept of ContextBroker log:
>   time=Tuesday 24 Sep 11:19:22 2019.846Z | lvl=ERROR | corr=28ee81ee-debd-11e9-84cc-3464a92017cd | trans=1569323345-406-00000000008 | from=127.0.0.1 | srv=fiwareiot | subsrv=/raw | comp=Orion | op=AlarmManager.cpp[211]:dbError | msg=Raising alarm DatabaseError: collection: orion.entities - update(): <{ _id.id: "DeviceEntity1", _id.type: "DeviceEntity", _id.servicePath:
> What MongoDB shard key strategy should i follow, for following composite document id,
> there may be multiple document for _id.id and _id.servicePath.
> I want to distribute data with "_id.id": "DeviceEntity1" and "_id.id": "DeviceEntity2"in two MongoDB shards.
>     "_id" : {
>         "id" : "DeviceEntity1",
>         "type" : "DeviceEntity",
>         "servicePath" : "/raw"
>     },... 
> Thank You.



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