Move scalability envelope back down to 250 nodes (#15381)

* .

* done?

* .

Co-authored-by: Alex Wu <[email protected]>

Author: 2 people

benchmarks/README.md

@@ -6,7 +6,7 @@ All distributed tests are run on 64 nodes with 64 cores/node. Maximum number of
 
 | Dimension                                       | Quantity |
 | ---------                                       | -------- |
-| # nodes in cluster (with trivial task workload) | 1000+     |
+| # nodes in cluster (with trivial task workload) | 250+     |
 | # actors in cluster (with trivial workload)     | 10k+     |
 | # simultaneously running tasks                  | 10k+     |
 | # simultaneously running placement groups       | 1k+      |

benchmarks/distributed/test_distributed.py

@@ -10,7 +10,7 @@
 MAX_ACTORS_IN_CLUSTER = 10000
 MAX_RUNNING_TASKS_IN_CLUSTER = 10000
 MAX_PLACEMENT_GROUPS = 1000
-MAX_NUM_NODES = 1000
+MAX_NUM_NODES = 250
 
 
 def num_alive_nodes():