support dsv3 use flashmla (#6593)

docs/zh/best_practices/DeepSeek-V3.md

@@ -69,3 +69,34 @@ python -m fastdeploy.entrypoints.openai.multi_api_server \
        --graph-optimization-config '{"use_cudagraph":true}' \
 
 ```
+
+**示例3：** H800上16卡部署 blockwise_fp8 模型16K上下文的服务
+
+这个例子中支持使用FlashMLA算子做MLA的计算
+
+```shell
+MODEL_PATH=/models/DeepSeek-V3.2-Exp-BF16
+
+export FD_DISABLE_CHUNKED_PREFILL=1
+export FD_ATTENTION_BACKEND="MLA_ATTN"
+export FLAGS_flash_attn_version=3
+export USE_FLASH_MLA=1
+
+export CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7
+export FD_ENABLE_MULTI_API_SERVER=1
+python -m fastdeploy.entrypoints.openai.multi_api_server \
+       --ports "9811,9812,9813,9814,9815,9816,9817,9818" \
+       --num-servers 8 \
+       --args --model "$model_path" \
+       --ips "10.95.246.220,10.95.230.91" \
+       --no-enable-prefix-caching \
+       --quantization block_wise_fp8 \
+       --disable-sequence-parallel-moe \
+       --tensor-parallel-size 1 \
+       --num-gpu-blocks-override 1024 \
+       --data-parallel-size 16 \
+       --max-model-len 16384 \
+       --enable-expert-parallel \
+       --max-num-seqs 20 \
+       --graph-optimization-config '{"use_cudagraph":true}' \
+```