Minor - P4 Description
The KeyPattern of a particular shard can be fetched using the following call.
ScopedCollectionMetadata collMetada;
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KeyPattern shardKeyPattern(collMetadata->getKeyPattern());
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Hence, it is unnecessary that the split chunk command must take in a BSONObj called keyPatternObj, as in the following code block.
BSONObj keyPatternObj;
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{
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BSONElement keyPatternElem;
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auto keyPatternStatus =
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bsonExtractTypedField(cmdObj, "keyPattern", Object, &keyPatternElem); |
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if (!keyPatternStatus.isOK()) { |
errmsg = "need to specify the key pattern the collection is sharded over"; |
return false; |
}
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keyPatternObj = keyPatternElem.Obj();
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}
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This keyPatternObj parameter can most likely be removed completely from the split chunk command.