On 9/11/2013 11:41 AM, Howard Chu wrote:
Just out of curiosity, why is keeping a count per key a problem? If you're using BDB duplicate key support, can't you just use cursor->c_count() to get this? I.e., BDB already maintains key counts internally, why not leverage that?
afaik you need to pass the DB_RECNUM flag at DB creation time to get record counting behavior, and it imposes a performance and concurrency penalty on writes. Also afaik 389DS does not set that flag except on VLV indexes (which need it, and coincidentally were the original reason for the feature being added to BDB).
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