Question

I have spent the better part of the last week configuring and tweaking the caching for our Magento store and it is working great on my dev install. I have Tinybrick s Lightspeed and Speedbooster extensions along with some customizations. It does full page caching and properly flushes the correct tags when I edit a product so that only the pages affected get flushed. I initially set it up using file caching and only just switched it over to Memcached. On my local dev server, this is still working great. When I put it on the remote dev server running in the same environment as our live site, this doesn t work as expected. For the most part it is good, but when I edit a product, I have to flush the entire cache to see the change. After doing some research I have learned that Memcached doesn t support flushing by matching tag...or at least that s what I understood from the Zend documentation:

Be careful : with this backend, "tags" are not supported for the moment as the "doNotTestCacheValidity=true" argument.

另外,如果你看一下档案的来源<代码>。 Zend/Cache/Backend/Memcastal.php in the clean/

case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
    $this->_log(self::TAGS_UNSUPPORTED_BY_CLEAN_OF_MEMCACHED_BACKEND);
    break;



However, on my local dev server, it seems to be working fine, which I really can t explain.  So that begs the question, "Why?".  Are there differences in versions of the Zend Framework or PHP that may affect this?  My local dev server is running the following:


  PHP 5.3.3-1ubuntu9.6 with Suhosin-Patch (cli) (built: Oct 14 2011 22:31:25)
  Copyright (c) 1997-2009 The PHP Group
  Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies


Our dev/live server is running this:


  PHP 5.2.17 (cli) (built: Jun 13 2011 14:23:24)
  Copyright (c) 1997-2010 The PHP Group
  Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies


这难道不是差别吗? 是否有这方面的经验? 如果这实际上是一种框架限制,是否知道围绕什么工作? 或者,我只是做了一些错误的事情吗?

Thanks!

Answer 1

According to this jira ticket, tags aren t supported for almost all backends in zf. You proposed to use hybrid backend Zend_Cache_Backend_TwoLevels instead. And magento already uses it! Look into Mage_Core_Model_Cache::_getBackendOptions(). So, now we should look into Zend_Cache_Backend_TwoLevels::clean() source code, for example:

        case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
            $ids = $this->_slowBackend->getIdsMatchingTags($tags);
            $res = true;
            foreach ($ids as $id) {
                $bool = $this->remove($id);
                $res = $res && $bool;
            }
            return $res;
            break;

如你所看到,如果发现标签,就会发现背心缓慢的对口,则从两端中删除。因此,你们的低端支持者或政党都存在一些错误,但却没有出现缓慢的背后(一些背后同步问题)。

您可以读到以下几条:

友情链接