[SERVER-33998] Remove the parallelCollectionScan command Created: 20/Mar/18 Updated: 29/Oct/23 Resolved: 13/Jul/18 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | 4.1.1 |
| Type: | Task | Priority: | Major - P3 |
| Reporter: | James Wahlin | Assignee: | Sean Tao |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | nyc | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Backwards Compatibility: | Major Change | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sprint: | Storage NYC 2018-07-02, Storage NYC 2018-07-16 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Participants: | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Description |
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In its current form, the parallelCollectionScan command will only return multiple cursors when running a mongod with the MMAPv1 storage engine. With the deprecation of MMAPv1 we should also deprecate parallelCollectionScan. If the ability to partition a collection is required under WiredTiger in the future, it is likely it will take a different form than parallelCollectionScan. Once such request is tracked by SERVER-24274 |
| Comments |
| Comment by Artem Khotsyanovich [ 04/May/21 ] |
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Hi, what is the alternative then? We have some custom code that has functionality similar to mongomirror to clone collections, but with advanced filtering. It makes use of `parallelCollectionScan` a lot since it's the way faster then using of a single cursor. Now we a trying to migrate to the latest mongo Atlas version from self-managed solution and it's a blocker for us. Any suggestion on how to clone collections fast with filters? |
| Comment by Sean Tao [ 13/Jul/18 ] |
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The parallelCollectionScan command is no longer supported, as we deleted the command entirely. |
| Comment by Githook User [ 12/Jul/18 ] |
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Author: {'name': 'Sean Tao', 'email': 'sean.tao@10gen.com'}Message: |
| Comment by Andy Schwerin [ 13/Apr/18 ] |
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I think we should just remove this command when we remove the rest of the mmapv1 support, and skip adding a separate deprecation warning. Assigning to storage backlog to consider as part of their plan to remove mmapv1 support. |