Slightly better

src/Disks/DiskWebServer.cpp

@@ -51,7 +51,7 @@ void DiskWebServer::Metadata::initialize(const String & uri_with_path, const Str
         assertChar('\t', metadata_buf);
         readIntText(file_size, metadata_buf);
         assertChar('\n', metadata_buf);
-        LOG_DEBUG(&Poco::Logger::get("DiskWeb"), "Read file: {}, size: {}", remote_file_name, file_size);
+        LOG_TRACE(&Poco::Logger::get("DiskWeb"), "Read file: {}, size: {}", remote_file_name, file_size);
 
         /*
          * URI/   {uri}/{uuid}/all_x_x_x/{file}
@@ -227,7 +227,7 @@ bool DiskWebServer::findFileInMetadata(const String & path, File & file_info) co
 
 bool DiskWebServer::exists(const String & path) const
 {
-    LOG_DEBUG(log, "Checking existence of file: {}", path);
+    LOG_TRACE(log, "Checking existence of file: {}", path);
 
     File file;
     return findFileInMetadata(path, file);
@@ -243,7 +243,7 @@ std::unique_ptr<ReadBufferFromFileBase> DiskWebServer::readFile(const String & p
 
     auto file_name = escapeForFileName(fs::path(path).stem()) + fs::path(path).extension().string();
     auto remote_path = fs::path(path).parent_path() / file_name;
-    LOG_DEBUG(log, "Read from file by path: {}", remote_path.string());
+    LOG_TRACE(log, "Read from file by path: {}", remote_path.string());
 
     RemoteMetadata meta(uri, remote_path);
     meta.remote_fs_objects.emplace_back(std::make_pair(getFileName(remote_path), file.size));
@@ -255,7 +255,7 @@ std::unique_ptr<ReadBufferFromFileBase> DiskWebServer::readFile(const String & p
 
 DiskDirectoryIteratorPtr DiskWebServer::iterateDirectory(const String & path)
 {
-    LOG_DEBUG(log, "Iterate directory: {}", path);
+    LOG_TRACE(log, "Iterate directory: {}", path);
     String uuid;
 
     if (RE2::FullMatch(path, ".*/store/"))

src/Interpreters/InterpreterAlterQuery.cpp

@@ -63,7 +63,7 @@ BlockIO InterpreterAlterQuery::execute()
     }
 
     StoragePtr table = DatabaseCatalog::instance().getTable(table_id, getContext());
-    if (table->isReadOnly())
+    if (table->isStaticStorage())
         throw Exception(ErrorCodes::TABLE_IS_READ_ONLY, "Table is read-only");
     auto alter_lock = table->lockForAlter(getContext()->getCurrentQueryId(), getContext()->getSettingsRef().lock_acquire_timeout);
     auto metadata_snapshot = table->getInMemoryMetadataPtr();

src/Interpreters/InterpreterDropQuery.cpp

@@ -163,7 +163,7 @@ BlockIO InterpreterDropQuery::executeToTableImpl(ASTDropQuery & query, DatabaseP
         if (query.kind == ASTDropQuery::Kind::Detach)
         {
             getContext()->checkAccess(drop_storage, table_id);
-            if (table->isReadOnly())
+            if (table->isStaticStorage())
                 throw Exception(ErrorCodes::TABLE_IS_READ_ONLY, "Table is read-only");
 
             if (table->isDictionary())
@@ -198,7 +198,7 @@ BlockIO InterpreterDropQuery::executeToTableImpl(ASTDropQuery & query, DatabaseP
                 throw Exception("Cannot TRUNCATE dictionary", ErrorCodes::SYNTAX_ERROR);
 
             getContext()->checkAccess(AccessType::TRUNCATE, table_id);
-            if (table->isReadOnly())
+            if (table->isStaticStorage())
                 throw Exception(ErrorCodes::TABLE_IS_READ_ONLY, "Table is read-only");
 
             table->checkTableCanBeDropped();

src/Storages/IStorage.cpp

@@ -201,7 +201,7 @@ NameDependencies IStorage::getDependentViewsByColumn(ContextPtr context) const
     return name_deps;
 }
 
-bool IStorage::isReadOnly() const
+bool IStorage::isStaticStorage() const
 {
     auto storage_policy = getStoragePolicy();
     if (storage_policy)

src/Storages/IStorage.h

@@ -540,7 +540,7 @@ public:
     virtual StoragePolicyPtr getStoragePolicy() const { return {}; }
 
     /// Returns true if all disks of storage are read-only.
-    virtual bool isReadOnly() const;
+    virtual bool isStaticStorage() const;
 
     /// If it is possible to quickly determine exact number of rows in the table at this moment of time, then return it.
     /// Used for:

src/Storages/StorageMergeTree.cpp

@@ -113,6 +113,10 @@ void StorageMergeTree::startup()
     time_after_previous_cleanup_parts.restart();
     time_after_previous_cleanup_temporary_directories.restart();
 
+    /// Do not schedule any background jobs if current storage has static data files.
+    if (isStaticStorage())
+        return;
+
     try
     {
         background_executor.start();
@@ -243,7 +247,7 @@ void StorageMergeTree::drop()
 {
     shutdown();
     /// In case there is read-only disk we cannot allow to call dropAllData(), but dropping tables is allowed.
-    if (isReadOnly())
+    if (isStaticStorage())
         return;
     dropAllData();
 }
@@ -1049,6 +1053,8 @@ bool StorageMergeTree::scheduleDataProcessingJob(IBackgroundJobExecutor & execut
     if (shutdown_called)
         return false;
 
+    assert(!isStaticStorage());
+
     auto metadata_snapshot = getInMemoryMetadataPtr();
     std::shared_ptr<MergeMutateSelectedEntry> merge_entry, mutate_entry;