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2017-10-17 BinaryCacheStore::addToStore(): Add NARs to the local cacheEelco Dolstra1-0/+4
2017-10-17 BinaryCacheStore: Support local caching of NARsEelco Dolstra1-1/+4
This speeds up commands like "nix cat-store". For example: $ time nix cat-store --store https://cache.nixos.org?local-nar-cache=/tmp/nar-cache /nix/store/i60yncmq6w9dyv37zd2k454g0fkl3arl-systemd-234/etc/udev/udev.conf real 0m4.336s $ time nix cat-store --store https://cache.nixos.org?local-nar-cache=/tmp/nar-cache /nix/store/i60yncmq6w9dyv37zd2k454g0fkl3arl-systemd-234/etc/udev/udev.conf real 0m0.045s The primary motivation is to allow hydra-server to serve files from S3 binary caches. Previously Hydra had a hack to do "nix-store -r <path>", but that fetches the entire closure so is prohibitively expensive. There is no garbage collection of the NAR cache yet. Also, the entire NAR is read when accessing a single member file. We could generate the NAR listing to provide random access. Note: the NAR cache is indexed by the store path hash, not the content hash, so NAR caches should not be shared between binary caches, unless you're sure that all your builds are binary-reproducible.
2017-10-17 Remove BinaryCacheStoreAccessorEelco Dolstra1-0/+3
Probably as a result of a bad merge in 4b8f1b0ec066a5b994747b1afd050f5f62d857f6, we had both a BinaryCacheStoreAccessor and a RemoteFSAccessor. BinaryCacheStore::getFSAccessor() returned the latter, but BinaryCacheStore::addToStore() checked for the former. This probably caused hydra-queue-runner to download paths that it just uploaded.
2016-09-02 Factor a general remote FS accessor out of BinaryCacheStoreShea Levy1-0/+29