tests/migrations: add scale test

split existing test into common subclass and test itself; use common in scale

tests/rptest/scale_tests/data_migrations_test.py

@@ -0,0 +1,35 @@
+# Copyright 2022 Redpanda Data, Inc.
+#
+# Use of this software is governed by the Business Source License
+# included in the file licenses/BSL.md
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0
+
+from rptest.services.cluster import cluster
+from ducktape.mark import parametrize
+from rptest.tests.data_migrations import DataMigrationsTest
+
+MIB_PER_PARTITION = 4
+PARTITIONS_PER_SHARD = 1000
+
+
+class DataMigrationsScaleTest(DataMigrationsTest):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args,
+                         **kwargs,
+                         extra_rp_conf={
+                             'topic_partitions_per_shard':
+                             PARTITIONS_PER_SHARD,
+                             'topic_memory_per_partition':
+                             MIB_PER_PARTITION * 1024 * 1024,
+                         })
+
+    @cluster(num_nodes=3,
+             log_allow_list=DataMigrationsTest.MIGRATION_LOG_ALLOW_LIST)
+    @parametrize(topics_count=10000, partitions_count=3)
+    @parametrize(topics_count=3, partitions_count=10000)
+    def test_migrate(self, topics_count, partitions_count):
+        self.do_test_creating_and_listing_migrations(topics_count,
+                                                     partitions_count)