Databricks DBRX: A State-of-the-Art Open LLM#
DBRX is an open, general-purpose LLM created by Databricks. It uses a mixture-of-experts (MoE) architecture with 132B total parameters of which 36B parameters are active on any input.
In this recipe, you will serve databricks/dbrx-instruct on your own infra – existing Kubernetes cluster or cloud VMs – with one command.
Prerequisites#
Go to the HuggingFace model page and request access to the model
databricks/dbrx-instruct.Check that you have installed SkyPilot (docs).
Check that
sky checkshows clouds or Kubernetes are enabled.
SkyPilot YAML#
Click to see the full recipe YAML
envs:
MODEL_NAME: databricks/dbrx-instruct
HF_TOKEN: # TODO: Fill with your own huggingface token, or use --env to pass.
service:
replicas: 2
# An actual request for readiness probe.
readiness_probe:
path: /v1/chat/completions
post_data:
model: $MODEL_NAME
messages:
- role: user
content: Hello! What is your name?
max_tokens: 1
resources:
accelerators: {A100-80GB:8, A100-80GB:4, A100:8, A100:16}
cpus: 32+
memory: 512+
use_spot: True
disk_size: 512 # Ensure model checkpoints (~246GB) can fit.
disk_tier: best
ports: 8081 # Expose to internet traffic.
setup: |
conda activate vllm
if [ $? -ne 0 ]; then
conda create -n vllm python=3.10 -y
conda activate vllm
fi
# DBRX merged on master, 3/27/2024
pip install git+https://github.com/vllm-project/vllm.git@e24336b5a772ab3aa6ad83527b880f9e5050ea2a
pip install gradio tiktoken==0.6.0 openai
run: |
conda activate vllm
echo 'Starting vllm api server...'
# https://github.com/vllm-project/vllm/issues/3098
export PATH=$PATH:/sbin
# NOTE: --gpu-memory-utilization 0.95 needed for 4-GPU nodes.
python -u -m vllm.entrypoints.openai.api_server \
--port 8081 \
--model $MODEL_NAME \
--trust-remote-code --tensor-parallel-size $SKYPILOT_NUM_GPUS_PER_NODE \
--gpu-memory-utilization 0.95 \
2>&1 | tee api_server.log &
while ! `cat api_server.log | grep -q 'Uvicorn running on'`; do
echo 'Waiting for vllm api server to start...'
sleep 5
done
echo 'Starting gradio server...'
git clone https://github.com/vllm-project/vllm.git || true
python vllm/examples/gradio_openai_chatbot_webserver.py \
-m $MODEL_NAME \
--port 8811 \
--model-url http://localhost:8081/v1
You can also get the full YAML file here.
Serving DBRX: single instance#
Launch a single spot instance to serve DBRX on your infra:
HF_TOKEN=xxx sky launch dbrx.yaml -c dbrx --env HF_TOKEN
Example outputs:
...
I 03-28 08:40:47 optimizer.py:690] == Optimizer ==
I 03-28 08:40:47 optimizer.py:701] Target: minimizing cost
I 03-28 08:40:47 optimizer.py:713] Estimated cost: $2.44 / hour
I 03-28 08:40:47 optimizer.py:713]
I 03-28 08:40:47 optimizer.py:836] Considered resources (1 node):
I 03-28 08:40:47 optimizer.py:906] ----------------------------------------------------------------------------------------------------------------------
I 03-28 08:40:47 optimizer.py:906] CLOUD INSTANCE vCPUs Mem(GB) ACCELERATORS REGION/ZONE COST ($) CHOSEN
I 03-28 08:40:47 optimizer.py:906] ----------------------------------------------------------------------------------------------------------------------
I 03-28 08:40:47 optimizer.py:906] Azure Standard_NC96ads_A100_v4[Spot] 96 880 A100-80GB:4 eastus 2.44 ✔
I 03-28 08:40:47 optimizer.py:906] AWS p4d.24xlarge[Spot] 96 1152 A100:8 us-east-2b 4.15
I 03-28 08:40:47 optimizer.py:906] Azure Standard_ND96asr_v4[Spot] 96 900 A100:8 eastus 4.82
I 03-28 08:40:47 optimizer.py:906] Azure Standard_ND96amsr_A100_v4[Spot] 96 1924 A100-80GB:8 southcentralus 5.17
I 03-28 08:40:47 optimizer.py:906] GCP a2-ultragpu-4g[Spot] 48 680 A100-80GB:4 us-east4-c 7.39
I 03-28 08:40:47 optimizer.py:906] GCP a2-highgpu-8g[Spot] 96 680 A100:8 us-central1-a 11.75
I 03-28 08:40:47 optimizer.py:906] GCP a2-ultragpu-8g[Spot] 96 1360 A100-80GB:8 us-east4-c 14.79
I 03-28 08:40:47 optimizer.py:906] GCP a2-megagpu-16g[Spot] 96 1360 A100:16 us-central1-a 22.30
I 03-28 08:40:47 optimizer.py:906] ----------------------------------------------------------------------------------------------------------------------
...
To run on Kubernetes or use an on-demand instance, pass --no-use-spot to the above command.
Example outputs with Kubernetes / on-demand instances:
$ HF_TOKEN=xxx sky launch dbrx.yaml -c dbrx --env HF_TOKEN --no-use-spot
...
I 03-28 08:47:27 optimizer.py:690] == Optimizer ==
I 03-28 08:47:27 optimizer.py:701] Target: minimizing cost
I 03-28 08:47:27 optimizer.py:713] Estimated cost: $0.0 / hour
I 03-28 08:47:27 optimizer.py:713]
I 03-28 08:47:27 optimizer.py:836] Considered resources (1 node):
I 03-28 08:47:27 optimizer.py:906] ------------------------------------------------------------------------------------------------------------------
I 03-28 08:47:27 optimizer.py:906] CLOUD INSTANCE vCPUs Mem(GB) ACCELERATORS REGION/ZONE COST ($) CHOSEN
I 03-28 08:47:27 optimizer.py:906] ------------------------------------------------------------------------------------------------------------------
I 03-28 08:47:27 optimizer.py:906] Kubernetes 32CPU--512GB--8A100 32 512 A100:8 kubernetes 0.00 ✔
I 03-28 08:47:27 optimizer.py:906] Azure Standard_NC96ads_A100_v4 96 880 A100-80GB:4 eastus 14.69
I 03-28 08:47:27 optimizer.py:906] Fluidstack recUYj6oGJCvAvCXC7KQo5Fc7 252 960 A100-80GB:8 generic_1_canada 19.79
I 03-28 08:47:27 optimizer.py:906] GCP a2-ultragpu-4g 48 680 A100-80GB:4 us-central1-a 20.11
I 03-28 08:47:27 optimizer.py:906] Paperspace A100-80Gx8 96 640 A100-80GB:8 East Coast (NY2) 25.44
I 03-28 08:47:27 optimizer.py:906] Azure Standard_ND96asr_v4 96 900 A100:8 eastus 27.20
I 03-28 08:47:27 optimizer.py:906] GCP a2-highgpu-8g 96 680 A100:8 us-central1-a 29.39
I 03-28 08:47:27 optimizer.py:906] Azure Standard_ND96amsr_A100_v4 96 1924 A100-80GB:8 eastus 32.77
I 03-28 08:47:27 optimizer.py:906] AWS p4d.24xlarge 96 1152 A100:8 us-east-1 32.77
I 03-28 08:47:27 optimizer.py:906] GCP a2-ultragpu-8g 96 1360 A100-80GB:8 us-central1-a 40.22
I 03-28 08:47:27 optimizer.py:906] AWS p4de.24xlarge 96 1152 A100-80GB:8 us-east-1 40.97
I 03-28 08:47:27 optimizer.py:906] GCP a2-megagpu-16g 96 1360 A100:16 us-central1-a 55.74
I 03-28 08:47:27 optimizer.py:906] ------------------------------------------------------------------------------------------------------------------
...
Wait until the model is ready (this can take 10+ minutes), as indicated by these lines:
...
(task, pid=17433) Waiting for vllm api server to start...
...
(task, pid=17433) INFO: Started server process [20621]
(task, pid=17433) INFO: Waiting for application startup.
(task, pid=17433) INFO: Application startup complete.
(task, pid=17433) INFO: Uvicorn running on http://0.0.0.0:8081 (Press CTRL+C to quit)
...
(task, pid=17433) Running on local URL: http://127.0.0.1:8811
(task, pid=17433) Running on public URL: https://xxxxxxxxxx.gradio.live
...
(task, pid=17433) INFO 03-28 04:32:50 metrics.py:218] Avg prompt throughput: 0.0 tokens/s, Avg generation throughput: 0.0 tokens/s, Running: 0 reqs, Swapped: 0 reqs, Pending: 0 reqs, GPU KV cache usage: 0.0%, CPU KV cache usage: 0.0%
🎉 Congratulations! 🎉 You have now launched the DBRX Instruct LLM on your infra.
You can play with the model via
Standard OpenAPI-compatible endpoints (e.g.,
/v1/chat/completions)Gradio UI (automatically launched)
To curl /v1/chat/completions:
IP=$(sky status --ip dbrx)
curl http://$IP:8081/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{
"model": "databricks/dbrx-instruct",
"messages": [
{
"role": "system",
"content": "You are a helpful assistant."
},
{
"role": "user",
"content": "Who are you?"
}
]
}'
To use the Gradio UI, open the URL shown in the logs:
(task, pid=17433) Running on public URL: https://xxxxxxxxxx.gradio.live
To stop the instance:
sky stop dbrx
To shut down all resources:
sky down dbrx
Serving DBRX: scaling up with SkyServe#
After playing with the model, you can deploy the model with autoscaling and load-balancing using SkyServe.
With no change to the YAML, launch a fully managed service on your infra:
HF_TOKEN=xxx sky serve up dbrx.yaml -n dbrx --env HF_TOKEN
Wait until the service is ready:
watch -n10 sky serve status dbrx
Example outputs:
Services
NAME VERSION UPTIME STATUS REPLICAS ENDPOINT
dbrx 1 35s READY 2/2 xx.yy.zz.100:30001
Service Replicas
SERVICE_NAME ID VERSION IP LAUNCHED RESOURCES STATUS REGION
dbrx 1 1 xx.yy.zz.121 18 mins ago 1x GCP([Spot]{'A100-80GB': 4}) READY us-east4
dbrx 2 1 xx.yy.zz.245 18 mins ago 1x GCP([Spot]{'A100-80GB': 4}) READY us-east4
Get a single endpoint that load-balances across replicas:
ENDPOINT=$(sky serve status --endpoint dbrx)
Tip: SkyServe fully manages the lifecycle of your replicas. For example, if a spot replica is preempted, the controller will automatically replace it. This significantly reduces the operational burden while saving costs.
To curl the endpoint:
curl $ENDPOINT/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{
"model": "databricks/dbrx-instruct",
"messages": [
{
"role": "system",
"content": "You are a helpful assistant."
},
{
"role": "user",
"content": "Who are you?"
}
]
}'
To shut down all resources:
sky serve down dbrx
See more details in SkyServe docs.