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add documentation for the local disk cache TTL config

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AmineChikhaoui 2018-04-02 17:41:49 +01:00
parent 2855c3d965
commit 86930ed414
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2 changed files with 32 additions and 6 deletions
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24
doc/manual/command-ref/conf-file.xml
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@ -788,6 +788,30 @@ password <replaceable>my-password</replaceable>
</varlistentry>
<varlistentry xml:id="conf-negative-disk-cache-ttl"><term><literal>negative-disk-cache-ttl</literal></term>
<listitem>
<para>The TTL in seconds for negative lookups. If a store path is queried from a substituer but
was not found, there will be a negative lookup cached in the local disk cache database for the specified
duration.</para>
</listitem>
</varlistentry>
<varlistentry xml:id="conf-positive-disk-cache-ttl"><term><literal>positive-disk-cache-ttl</literal></term>
<listitem>
<para>The TTL in seconds for positive lookups. If a store path is queried from a substituer, the result of
the query will be cached in the local disk cache database including some of the NAR metadata. Setting a TTL
for positive lookups can be useful in case of builds that aren't reproducible, in which case having a more
frequent cache invalidation would prevent hash mismatch issues.</para>
</listitem>
</varlistentry>
</variablelist>

14
src/libstore/globals.hh
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@ -310,15 +310,17 @@ public:
"Disabled substituters that may be enabled via the substituters option by untrusted users.",
{"trusted-binary-caches"}};
Setting<int> ttlNegativeDiskCache{this, 3600, "negative-disk-cache-ttl",
"The TTL in seconds for negative lookups in the disk cache."};
Setting<int> ttlPositiveDiskCache{this, 30 * 24 * 3600, "positive-disk-cache-ttl",
"The TTL in seconds for positive lookups in the disk cache."};
Setting<Strings> trustedUsers{this, {"root"}, "trusted-users",
"Which users or groups are trusted to ask the daemon to do unsafe things."};
Setting<unsigned int> ttlNegativeDiskCache{this, 3600, "negative-disk-cache-ttl",
"The TTL in seconds for negative lookups in the disk cache i.e binary cache lookups that "
"return an invalid path result"};
Setting<unsigned int> ttlPositiveDiskCache{this, 30 * 24 * 3600, "positive-disk-cache-ttl",
"The TTL in seconds for positive lookups in the disk cache i.e binary cache lookups that "
"return a valid path result."};
/* ?Who we trust to use the daemon in safe ways */
Setting<Strings> allowedUsers{this, {"*"}, "allowed-users",
"Which users or groups are allowed to connect to the daemon."};