[PROPOSAL] Remove the Second CacheSM (and APIs)

Thu, 14 Jun 2018 08:48:40 -0700 

Hi all,

I’ve prepared this pr:

        https://github.com/apache/trafficserver/pull/3824 
<https://github.com/apache/trafficserver/pull/3824>


which removes the second cacheSM. This also implies removing the following APIs:

        TSReturnCode TSHttpTxnNewCacheLookupDo(TSHttpTxn txnp, TSMBuffer bufp, 
TSMLoc url_loc);
        TSReturnCode TSHttpTxnSecondUrlTryLock(TSHttpTxn txnp);


The reason for this is to simplify / unify how we deal with cache keys, such 
that we can make progress on this proposal:

        https://cwiki.apache.org/confluence/display/TS/Cleanup+of+Cache+URLs 
<https://cwiki.apache.org/confluence/display/TS/Cleanup+of+Cache+URLs>



Please let me know if there are any concerns with this.

— leif

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