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The online manual makes one reference that I can see to Jumbo chunks, indicating that a chunk is labeled as jumbo if it is too large to avoid repeated attempts to migrate the chunk. This is true.
This flag is only ever cleared if the chunk is successfully split, however, there are circumstances where we would like to manually reset the flag. See for example the following Server tickets:
- SERVER-13024 : Clear the 'jumbo' flag from the chunk document when the chunk is no longer over-sized
SERVER-11629 : Allow Jumbo Chunks to be Drained / Migrated
The process to reset the jumbo flag should be documented. See associated help ticket (HELP-380) for details.
Ronan
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