Github user jacksontj commented on the pull request:
https://github.com/apache/trafficserver/pull/526#issuecomment-197011767
I don't think we can ever gaurantee that there will always be space
available, and since we already evict when we need space, we should just keep
doing that IMO.
I think we should basically do 1, but specifically as an atomic insert.
Right now we are inserting N (usually 2-3) items into MultiCache. Instead we
could allocate all of the space up front, and insert just a single item-- this
way we are atomic with our objects in cache.
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