Hi Masanori, Thanks for a comment.
I looked through the users and dev mailing lists and found the following mail. http://mail-archives.apache.org/mod_mbox/trafficserver-users/201510.mbox/%3CCAFKFyq6BrVktT+h4hT=mk27xcbsrigj+xoowyugdtmklcyu...@mail.gmail.com%3E So I came to the same conclusion as your advice: RAMFS. Thanks, Hiroaki 2016-02-17 14:54 GMT+09:00 Masaori Koshiba <[email protected]>: > AFAIK, ATS requires disks to cache. So a solution for RAM only caching would > be RAMFS. > > - Masaori > > 2016年2月16日(火) 15:28 Hiroaki Nakamura <[email protected]>: >> >> Hi All, >> >> I would like to set up hierarchical caches with RAM only children and >> disk only parents. >> >> Here is my setup as docker containers. >> >> https://github.com/hnakamur/ats-hierarchical-cache-experiment-docker/tree/ram_only_first_and_disk_only_second >> >> For the child server, I created the empty storage.config and set >> proxy.config.cache.ram_cache.size to 1048576 (1MB). >> However I got the following warning in the diags.log of the child cache. >> >> [Feb 16 05:55:25.535] Server {0x2ac07a601e40} WARNING: <Cache.cc:747 >> (start_internal)> unable to open cache disk(s): Cache Disabled >> >> >> For the parent server, I set proxy.config.cache.ram_cache.size to 0. >> >> However, I got the following via response header for the 4th request. >> >> https://github.com/hnakamur/ats-hierarchical-cache-experiment-docker/blob/ram_only_first_and_disk_only_second/README.md >> >> Via: http/1.1 copr-builder-883070330.novalocal >> (ApacheTrafficServer/6.1.1 [uScRs f p eN:t cCHi p s ]), http/1.1 >> copr-builder-883070330.novalocal (ApacheTrafficServer/6.1.1 [uScMsSf >> pSeN:t cCMi pSs ]) >> >> The left value (the parent cache) before the comma has c >> (cache-lookup) value "R", which is RAM hit. >> I don't know why a RAM hit occurs when I set >> proxy.config.cache.ram_cache.size to 0. >> >> >> How can I set up RAM only children and disk only parents? >> Is it possible? >> >> Best regards, >> Hioraki
