[SERVER-10677] Execute aggregation framework on secondary node Created: 04/Sep/13 Updated: 10/Dec/14 Resolved: 09/Sep/13 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Aggregation Framework, Internal Client |
| Affects Version/s: | 2.4.6 |
| Fix Version/s: | None |
| Type: | Question | Priority: | Minor - P4 |
| Reporter: | Dmitry | Assignee: | Unassigned |
| Resolution: | Done | Votes: | 0 |
| Labels: | aggregate, c++, mongod, mongos | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Environment: |
Linux Ubuntu 12.04 single shard server with 4 nodes in one replicaset 2.4.6 |
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| Participants: |
| Description |
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Hello. In C++ i tried execute aggregation framework like in example with readPreference : conn->runCommand( "goods", BSON( "aggregate" << "events" << "pipeline" << pipeline<<"$readPreference"<<BSON("mode"<<"secondaryPreferred")), res); Client connected to monogos with one single shard with four nodes in replicaset. Command always execute on primary node. I dont understand, how execute framework on secondary node. Thank you. |
| Comments |
| Comment by Dmitry [ 05/Sep/13 ] | |||
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Thank you. Works for me. If add to cmdCommand $queryOptions: { $readPreference: { mode: "secondaryPreferred" }} } works too. | |||
| Comment by Randolph Tan [ 04/Sep/13 ] | |||
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Hi, Currently, there is no helper method for the C++ driver for setting read preference for commands. As a work around, can you try doing this instead?
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