fix

Author: Jinming-Hu

sdk/storage/azure-storage-common/src/concurrent_transfer.cpp

@@ -9,8 +9,8 @@ namespace Azure { namespace Storage { namespace _internal {
 
   int GetHardwareConcurrency()
   {
-    static int c = std::thread::hardware_concurrency();
+    static int c = static_cast<int>(std::thread::hardware_concurrency());
     return c;
   }
 
-}}} // namespace Azure::Storage::_internal
+}}} // namespace Azure::Storage::_internal

sdk/storage/azure-storage-files-shares/inc/azure/storage/files/shares/share_options.hpp

@@ -1401,8 +1401,7 @@ namespace Azure { namespace Storage { namespace Files { namespace Shares {
       /**
        * The maximum number of threads that may be used in a parallel transfer.
        */
-      int32_t Concurrency
-          = _internal::GetHardwareConcurrency() != 0 ? _internal::GetHardwareConcurrency() : 1;
+      int32_t Concurrency = (std::min)(96, (std::max)(8, _internal::GetHardwareConcurrency()));
     } TransferOptions;
   };