greatsharp opened a new pull request, #2954:
URL: https://github.com/apache/kvrocks/pull/2954
**_Background_**
1. Issue #2715 and #2723 reported duplicated data during cluster expansion.
This PR introduce a way to find out the dirt slots which slot has been migrated
but data remained on node, then clear the dirty data on node.
2. Users may want to know how many keys in each slot.
**_Usage_**
Use command "slotsize {SlotRange} scan" to scan keys of slot range no node.
Use command "slotsize {SlotRange} clear" to clear keys of slot range which
slots has been migrated on node.
Use command "slotsize {SlotRange}" to print out the stats of each slot.
**_TBD_**
command test case is incoming
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