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Sam Hemelryk authored
Several reports have been made about the unexpected purging of entire memcached servers when MUC is configured to use Memcache and caches get purged. This is expected and occurs because the memcache extenions don't provide isolated containers. Moodle data is stored along side any other data in the cache and when caches get purged all data gets removed whether it belongs to Moodle or not. The docs cover this point and here I've added notes about this to both config-dist.php and cache/README.md
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