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Re-implement negative binary cache lookup caching

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This commit is contained in:
Eelco Dolstra 2016-06-20 17:39:05 +02:00
parent fffacd7c78
commit 74dd603495
2 changed files with 22 additions and 15 deletions
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27
src/libstore/nar-info-disk-cache.cc
View file

@ -20,7 +20,7 @@ create table if not exists BinaryCaches (
create table if not exists NARs (
cache integer not null,
hashPart text not null,
namePart text not null,
namePart text,
url text,
compression text,
fileHash text,
@ -31,6 +31,7 @@ create table if not exists NARs (
deriver text,
sigs text,
timestamp integer not null,
present integer not null,
primary key (cache, hashPart),
foreign key (cache) references BinaryCaches(id) on delete cascade
);
@ -64,7 +65,7 @@ public:
struct State
{
SQLite db;
SQLiteStmt insertCache, queryCache, insertNAR, queryNAR, insertNARExistence, queryNARExistence;
SQLiteStmt insertCache, queryCache, insertNAR, insertMissingNAR, queryNAR;
std::map<std::string, Cache> caches;
};
@ -74,7 +75,7 @@ public:
{
auto state(_state.lock());
Path dbPath = getCacheDir() + "/nix/binary-cache-v4.sqlite";
Path dbPath = getCacheDir() + "/nix/binary-cache-v5.sqlite";
createDirs(dirOf(dbPath));
if (sqlite3_open_v2(dbPath.c_str(), &state->db.db,
@ -101,16 +102,13 @@ public:
state->insertNAR.create(state->db,
"insert or replace into NARs(cache, hashPart, namePart, url, compression, fileHash, fileSize, narHash, "
"narSize, refs, deriver, sigs, timestamp) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
"narSize, refs, deriver, sigs, timestamp, present) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 1)");
state->insertMissingNAR.create(state->db,
"insert or replace into NARs(cache, hashPart, timestamp, present) values (?, ?, ?, 0)");
state->queryNAR.create(state->db,
"select * from NARs where cache = ? and hashPart = ?");
state->insertNARExistence.create(state->db,
"insert or replace into NARExistence(cache, storePath, exist, timestamp) values (?, ?, ?, ?)");
state->queryNARExistence.create(state->db,
"select exist, timestamp from NARExistence where cache = ? and storePath = ?");
}
Cache & getCache(State & state, const std::string & uri)
@ -165,6 +163,9 @@ public:
// FIXME: check NARExistence
return {oUnknown, 0};
if (!queryNAR.getInt(13))
return {oInvalid, 0};
auto narInfo = make_ref<NarInfo>();
// FIXME: implement TTL.
@ -219,8 +220,10 @@ public:
(time(0)).exec();
} else {
// not implemented
abort();
state->insertMissingNAR.use()
(cache.id)
(hashPart)
(time(0)).exec();
}
}
};

10
src/libstore/store-api.cc
View file

@ -265,9 +265,13 @@ bool Store::isValidPath(const Path & storePath)
}
}
return isValidPathUncached(storePath);
bool valid = isValidPathUncached(storePath);
// FIXME: insert result into NARExistence table of diskCache.
if (diskCache && !valid)
// FIXME: handle valid = true case.
diskCache->upsertNarInfo(getUri(), hashPart, 0);
return valid;
}
@ -302,7 +306,7 @@ ref<const ValidPathInfo> Store::queryPathInfo(const Path & storePath)
auto info = queryPathInfoUncached(storePath);
if (diskCache && info)
if (diskCache)
diskCache->upsertNarInfo(getUri(), hashPart, info);
{