如何使用php查詢memcached以獲取存儲中所有密鑰的列表？

Question

我需要將memcached複製到另一個鍵值系統（couchbase）。我如何查詢memcached服務器的內容以獲取內容列表，以便我可以複製它？

Answer 1

內存緩存> = 2.0.0

function getMemcacheKeys() { 
    $memcache = new Memcache; 
    $memcache->connect('127.0.0.1', 11211) 
     or die ("Could not connect to memcache server"); 

    $list = array(); 
    $allSlabs = $memcache->getExtendedStats('slabs'); 
    $items = $memcache->getExtendedStats('items'); 
    foreach($allSlabs as $server => $slabs) { 
     foreach($slabs AS $slabId => $slabMeta) { 
      $cdump = $memcache->getExtendedStats('cachedump',(int)$slabId); 
      foreach($cdump AS $keys => $arrVal) { 
       if (!is_array($arrVal)) continue; 
       foreach($arrVal AS $k => $v) {     
        echo $k .'<br>'; 
       } 
      } 
     } 
    } 
} 

Answer 2

感謝您的示例代碼

下面是如何

我使用一個輔助類，以除去以除去特定的鍵或多個鍵緩存，所以你必須給函數一個參考memcache連接

public static function removePriceCache(&$memcache, &$cacheAvailable) { 

    if ($cacheAvailable == true) { 
     $list = array(); 
     $allSlabs = $memcache->getExtendedStats('slabs'); 
     $items = $memcache->getExtendedStats('items'); 
     foreach ($allSlabs as $server => $slabs) { 
      foreach ($slabs AS $slabId => $slabMeta) { 
       $cdump = $memcache->getExtendedStats('cachedump', (int) $slabId); 
       foreach ($cdump AS $keys => $arrVal) { 
        if (!is_array($arrVal)) 
         continue; 
        foreach ($arrVal as $k => $v) { 
         //echo $k . '<br>'; 

         if (stripos($k, "Price") !== false) { 
          $memcache->delete($k); 
         } 
        } 
       } 
      } 
     } 
    } 
} 

這將刪除所有包含單詞「價格」在它的鍵..

Answer 3

所有這些對內存緩存解決方案，因此在這裏是爲Memcached的

function getMemcachedKeys($host = '127.0.0.1', $port = 11211) 
{ 

    $mem = @fsockopen($host, $port); 
    if ($mem === FALSE) return -1; 

    // retrieve distinct slab 
    $r = @fwrite($mem, 'stats items' . chr(10)); 
    if ($r === FALSE) return -2; 

    $slab = array(); 
    while (($l = @fgets($mem, 1024)) !== FALSE) { 
     // sortie ? 
     $l = trim($l); 
     if ($l == 'END') break; 

     $m = array(); 
     // <STAT items:22:evicted_nonzero 0> 
     $r = preg_match('/^STAT\sitems\:(\d+)\:/', $l, $m); 
     if ($r != 1) return -3; 
     $a_slab = $m[1]; 

     if (!array_key_exists($a_slab, $slab)) $slab[$a_slab] = array(); 
    } 

    // recuperer les items 
    reset($slab); 
    foreach ($slab AS $a_slab_key => &$a_slab) { 
     $r = @fwrite($mem, 'stats cachedump ' . $a_slab_key . ' 100' . chr(10)); 
     if ($r === FALSE) return -4; 

     while (($l = @fgets($mem, 1024)) !== FALSE) { 
      // sortie ? 
      $l = trim($l); 
      if ($l == 'END') break; 

      $m = array(); 
      // ITEM 42 [118 b; 1354717302 s] 
      $r = preg_match('/^ITEM\s([^\s]+)\s/', $l, $m); 
      if ($r != 1) return -5; 
      $a_key = $m[1]; 

      $a_slab[] = $a_key; 
     } 
    } 

    // close 
    @fclose($mem); 
    unset($mem); 

    // transform it; 
    $keys = array(); 
    reset($slab); 
    foreach ($slab AS &$a_slab) { 
     reset($a_slab); 
     foreach ($a_slab AS &$a_key) $keys[] = $a_key; 
    } 
    unset($slab); 

    return $keys; 
}