Improved check for parts on different disks.

dbms/src/Disks/DiskSpaceMonitor.cpp

@@ -208,6 +208,31 @@ StoragePolicy::StoragePolicy(String name_, Volumes volumes_, double move_factor_
 }
 
 
+bool StoragePolicy::isDefaultPolicy() const
+{
+    /// Guessing if this policy is default, not 100% correct though.
+
+    if (getName() != "default")
+        return false;
+
+    const auto & volumes = getVolumes();
+    if (volumes.size != 1)
+        return false;
+
+    if (volumes[0]->getName() != "default")
+        return false;
+
+    const auto & disks = volumes[0]->disks;
+    if (disks.size != 1)
+        return false;
+
+    if (disks[0]->getName() != "default")
+        return false;
+
+    return true;
+}
+
+
 Disks StoragePolicy::getDisks() const
 {
     Disks res;

dbms/src/Disks/DiskSpaceMonitor.h

@@ -103,6 +103,8 @@ public:
 
     StoragePolicy(String name_, Volumes volumes_, double move_factor_);
 
+    bool isDefaultPolicy() const;
+
     /// Returns disks ordered by volumes priority
     Disks getDisks() const;
 

dbms/src/Storages/MergeTree/MergeTreeData.cpp

@@ -803,7 +803,8 @@ void MergeTreeData::loadDataParts(bool skip_sanity_checks)
 
     auto disks = storage_policy->getDisks();
 
-    if (getStoragePolicy()->getName() != "default")
+    /// Only check if user did touch storage configuration for this table.
+    if (getStoragePolicy()->isDefaultPolicy() && !skip_sanity_checks)
     {
         /// Check extra parts at different disks, in order to not allow to miss data parts at undefined disks.
         std::unordered_set<String> defined_disk_names;