Fix CLI max partitions default (#8944)

ydb/public/lib/ydb_cli/commands/ydb_service_topic.cpp

@@ -304,8 +304,7 @@ namespace {
 
         config.Opts->AddLongOption("auto-partitioning-max-partitions-count", "Maximum number of partitions for topic")
             .Optional()
-            .StoreResult(&MaxActivePartitions_)
-            .DefaultValue(1);
+            .StoreResult(&MaxActivePartitions_);
         AddAutoPartitioning(config, false);
     }
 
@@ -329,7 +328,11 @@ namespace {
         GetAutoPartitioningUpUtilizationPercent() ? *GetAutoPartitioningUpUtilizationPercent() : 0,
         GetAutoPartitioninDownUtilizationPercent() ? *GetAutoPartitioninDownUtilizationPercent() : 0);
 
-        settings.PartitioningSettings(MinActivePartitions_, MaxActivePartitions_, autoscaleSettings);
+        ui32 finalMaxActivePartitions = MaxActivePartitions_.Defined() ? *MaxActivePartitions_
+                                      : autoscaleSettings.GetStrategy() != NTopic::EAutoPartitioningStrategy::Disabled ? MinActivePartitions_ + 50
+                                      : MinActivePartitions_;
+
+        settings.PartitioningSettings(MinActivePartitions_, finalMaxActivePartitions, autoscaleSettings);
         settings.PartitionWriteBurstBytes(PartitionWriteSpeedKbps_ * 1_KB);
         settings.PartitionWriteSpeedBytesPerSecond(PartitionWriteSpeedKbps_ * 1_KB);
 

ydb/public/lib/ydb_cli/commands/ydb_service_topic.h

@@ -71,8 +71,7 @@ namespace NYdb::NConsoleClient {
         ui64 RetentionPeriodHours_;
         ui64 RetentionStorageMb_;
         ui32 MinActivePartitions_;
-        ui32 MaxActivePartitions_;
-
+        TMaybe<ui32> MaxActivePartitions_;
         ui32 PartitionWriteSpeedKbps_;
     };