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icewind1991 wants to merge 3 commits into from
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cache storage id mapping in memcache #31905

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b7e4414
cache storage id mapping in memcache
icewind1991 Apr 8, 2022
5a8ba00
Merge branch 'master' into storage-id-cache-memcache
skjnldsv Feb 27, 2024
8c568e4
Merge branch 'master' into storage-id-cache-memcache
skjnldsv Mar 15, 2024
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8 changes: 7 additions & 1 deletion lib/private/Files/Cache/Storage.php
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@

use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\Files\Storage\IStorage;
use OCP\ICacheFactory;
use OCP\IDBConnection;
use Psr\Log\LoggerInterface;

Expand All @@ -56,7 +57,10 @@ class Storage {
*/
public static function getGlobalCache() {
if (is_null(self::$globalCache)) {
self::$globalCache = new StorageGlobal(\OC::$server->getDatabaseConnection());
self::$globalCache = new StorageGlobal(
\OC::$server->getDatabaseConnection(),
\OC::$server->get(ICacheFactory::class),
);
}
return self::$globalCache;
}
Expand Down Expand Up @@ -180,6 +184,7 @@ public function setAvailability($isAvailable, int $delay = 0) {
->set('last_checked', $query->createNamedParameter(time() + $delay))
->where($query->expr()->eq('id', $query->createNamedParameter($this->storageId)));
$query->execute();
self::getGlobalCache()->removeFromMemcache($this->numericId, $this->storageId);
}

/**
Expand All @@ -200,6 +205,7 @@ public static function exists($storageId) {
public static function remove($storageId) {
$storageId = self::adjustStorageId($storageId);
$numericId = self::getNumericStorageId($storageId);
self::getGlobalCache()->removeFromMemcache($numericId, $storageId);

$query = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$query->delete('storages')
Expand Down
83 changes: 56 additions & 27 deletions lib/private/Files/Cache/StorageGlobal.php
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,8 @@
namespace OC\Files\Cache;

use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\ICache;
use OCP\ICacheFactory;
use OCP\IDBConnection;

/**
Expand All @@ -38,16 +40,17 @@
* @package OC\Files\Cache
*/
class StorageGlobal {
/** @var IDBConnection */
private $connection;
private IDBConnection $connection;
private ICache $memCache;

/** @var array<string, array> */
private $cache = [];
/** @var array<int, array> */
private $numericIdCache = [];

public function __construct(IDBConnection $connection) {
public function __construct(IDBConnection $connection, ICacheFactory $cacheFactory) {
$this->connection = $connection;
$this->memCache = $cacheFactory->createLocal("storage_id::");
}

/**
Expand All @@ -72,19 +75,13 @@ public function loadForStorageIds(array $storageIds) {
*/
public function getStorageInfo(string $storageId): ?array {
if (!isset($this->cache[$storageId])) {
$builder = $this->connection->getQueryBuilder();
$query = $builder->select(['id', 'numeric_id', 'available', 'last_checked'])
->from('storages')
->where($builder->expr()->eq('id', $builder->createNamedParameter($storageId)));

$result = $query->execute();
$row = $result->fetch();
$result->closeCursor();

if ($row) {
$this->cache[$storageId] = $row;
$this->numericIdCache[(int)$row['numeric_id']] = $row;
$data = $this->memCache->get("id::$storageId");
if (!$data) {
$data = $this->getByIdFromDb($storageId);
$this->memCache->set("id::$storageId", $data);
}
$this->cache[$storageId] = $data;
$this->numericIdCache[(int)$data['numeric_id']] = $data;
}
return $this->cache[$storageId] ?? null;
}
Expand All @@ -95,24 +92,56 @@ public function getStorageInfo(string $storageId): ?array {
*/
public function getStorageInfoByNumericId(int $numericId): ?array {
if (!isset($this->numericIdCache[$numericId])) {
$builder = $this->connection->getQueryBuilder();
$query = $builder->select(['id', 'numeric_id', 'available', 'last_checked'])
->from('storages')
->where($builder->expr()->eq('numeric_id', $builder->createNamedParameter($numericId)));

$result = $query->execute();
$row = $result->fetch();
$result->closeCursor();

if ($row) {
$this->numericIdCache[$numericId] = $row;
$this->cache[$row['id']] = $row;
$data = $this->memCache->get("numeric::$numericId");
if (!$data) {
$data = $this->getByNumericFromDb($numericId);
$this->memCache->set("numeric::$numericId", $data);
}
$this->numericIdCache[$numericId] = $data;
$this->cache[$data['id']] = $data;
}
return $this->numericIdCache[$numericId] ?? null;
}

private function getByIdFromDb(string $storageId): ?array {
$builder = $this->connection->getQueryBuilder();
$query = $builder->select(['id', 'numeric_id', 'available', 'last_checked'])
->from('storages')
->where($builder->expr()->eq('id', $builder->createNamedParameter($storageId)));

$result = $query->execute();
$row = $result->fetch();
$result->closeCursor();
if ($row) {
return $row;
} else {
return null;
}
}

private function getByNumericFromDb(int $numericId): ?array {
$builder = $this->connection->getQueryBuilder();
$query = $builder->select(['id', 'numeric_id', 'available', 'last_checked'])
->from('storages')
->where($builder->expr()->eq('numeric_id', $builder->createNamedParameter($numericId)));

$result = $query->execute();
$row = $result->fetch();
$result->closeCursor();
if ($row) {
return $row;
} else {
return null;
}
}

public function removeFromMemcache(int $numericId, string $id) {
$this->memCache->remove("id::$id");
$this->memCache->remove("numeric::$numericId");
}

public function clearCache() {
$this->cache = [];
$this->memCache->clear();
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@juliusknorr juliusknorr Apr 8, 2022

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Might be something to check where this is being called, clearing redis with a prefix might be a bit slow due to the keys command having a O(n) runtime.

}
}