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    Type:Task 
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    Resolution: Fixed
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    Priority:Major - P3 
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    Affects Version/s: None
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    Component/s: None
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        Fully Compatible
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        Sharding EMEA 2022-03-07
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Objective of this ticket is to only track the initial number of orphans on the recipient.
During a migration, on a recipient such field will be:
- Initialized to 0 when the pending range deletion documents is created.
- Increased after every received batch.
- Increased/decreased upon applying modifications (transferMods): may increase in case of upserts, decrease in case of deletions.
- depends on
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                    SERVER-63335 Add `numOrphanDocs` field to range deletion task documents -         
- Closed
 
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- related to
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                    SERVER-63763 Track initial number of orphans in range deletion task documents (donor-side) -         
- Closed
 
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