Borrow vLLM concurrenccy logic a little.

.runpod/hub.json

@@ -13,13 +13,33 @@
     "env": [
       {
         "key": "MODEL_NAME",
-          "input": {
-            "name": "Model Name",
-            "type": "string",
-            "description": "Name of a model to preload",
-            "default": "phi3",
-            "advanced": false
-          }
+        "input": {
+          "name": "Model Name",
+          "type": "string",
+          "description": "Name of a model to preload",
+          "default": "phi3",
+          "advanced": false
+        }
+      },
+      {
+        "key": "MAX_CONCURRENCY",
+        "input": {
+          "name": "Max Concurrency",
+          "type": "number",
+          "description": "Maximum number of concurrent requests to handle (default: 8)",
+          "default": 8,
+          "advanced": true
+        }
+      },
+      {
+        "key": "OLLAMA_NUM_PARALLEL",
+        "input": {
+          "name": "Parallel Requests",
+          "type": "string",
+          "description": "Maximum number of concurrent requests to handle (default: 4 or 1)",
+          "default": "",
+          "advanced": true
+        }
       }
     ]
   }

src/handler.py

@@ -1,7 +1,10 @@
 import runpod
+import os
 from utils import JobInput
 from engine import OllamaEngine, OllamaOpenAiEngine
 
+DEFAULT_MAX_CONCURRENCY = 8
+max_concurrency = int(os.getenv("MAX_CONCURRENCY", DEFAULT_MAX_CONCURRENCY))
 
 async def handler(job: any):
     # Just dump the whole input to the console and then return an {"ok": True} response
@@ -27,6 +30,7 @@ async def handler(job: any):
 runpod.serverless.start(
     {
         "handler": handler,
+        "concurrency_modifier": lambda x: max_concurrency,
         "return_aggregate_stream": True,
     }
 )