only send data into redis if the md5sum of the object is different than the md5sum that exists in the cache.   otherwise, simply update the TTL of the key and exit.  this reduces network insertion load to the redis server by 95%
only send data into redis if the md5sum of the object is different than the md5sum that exists in the cache.   otherwise, simply update the TTL of the key and exit.  this reduces network insertion load to the redis server by 95%

linkedin/sysops-api,linkedin/sysops-api,slietz/sysops-api,slietz/sysops-api