> One additionnal question, I don't really understand what is in the key > cache. I have a column family with only one key, and the keycache size > is 118 ... ?
The key cache is basically a hash table mapping row keys to sstable offsets. It avoids the need to read from the index portion of the sstable for specific keys that have recently been accessed. (Normally the index portion is seeked into, a bit of data is streamed from disk, de-serialized, and used to find the offset for that key). -- / Peter Schuller
