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[diffusion] chore: remove ltx2 snapshot mode (#28533)

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Mick
2026-06-18 10:20:21 +08:00
committed by GitHub
parent 9888b7b42b
commit 05b3fd0f44
12 changed files with 162 additions and 518 deletions
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docs_new/cookbook/diffusion/LTX/LTX2 & LTX2.3.mdx
+4 -3
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@@ -61,10 +61,11 @@ For two-stage pipelines, `--ltx2-two-stage-device-mode` controls transformer res
| Mode | When to use it |
| --- | --- |
| `snapshot` | Recommended default. Balances latency and VRAM. |
| `resident` | Best latency on high-VRAM GPUs because both DiTs can stay resident. |
| `original` | Closest to the original two-stage switching semantics. |
`snapshot` is kept only as a deprecated compatibility alias for `original` and may be removed after two release cycles; use `original` or `resident` in new configs.
Other deployment flags:
- `--lora-path`: Preload a community LoRA adapter.
@@ -81,13 +82,13 @@ For latency-oriented LTX serving, prefer CFG parallel over sequence parallelism.
| Target | Recommended server flags | Notes |
| --- | --- | --- |
| LTX-2.3, 1 high-VRAM GPU | `--ltx2-two-stage-device-mode resident` | Fastest two-stage setup when both DiTs fit. |
| LTX-2.3, 1 standard GPU | `--ltx2-two-stage-device-mode snapshot` | Lower VRAM than `resident`; use this when H100-class memory is tight. |
| LTX-2.3, 1 standard GPU | `--ltx2-two-stage-device-mode original` | Lower VRAM than `resident`; use this when H100-class memory is tight. |
| LTX-2, 2 GPUs | `--num-gpus 2 --enable-cfg-parallel` | Fastest verified 2-GPU setup; keep `--dit-layerwise-offload` disabled unless memory is tight. |
| LTX-2.3, 2 GPUs | `--num-gpus 2 --enable-cfg-parallel --ltx2-two-stage-device-mode resident` | Fastest common 2-GPU setup. |
| LTX-2.3, 4 GPUs | `--num-gpus 4 --tp-size 2 --enable-cfg-parallel --ltx2-two-stage-device-mode resident` | Fastest common 4-GPU layout: TP2 inside each CFG branch. |
| Official comparison | `--ltx2-two-stage-device-mode original` | Use this only when matching the original LTX-2.3 stage-switch semantics matters. |
Use `--enable-cfg-parallel` for degree-2 CFG parallel. Use `--cfg-parallel-size` only when you explicitly need a different CFG branch count. If `resident` exceeds available VRAM, keep the same parallelism preset and switch only the device mode to `snapshot`.
Use `--enable-cfg-parallel` for degree-2 CFG parallel. Use `--cfg-parallel-size` only when you explicitly need a different CFG branch count. If `resident` exceeds available VRAM, keep the same parallelism preset and switch only the device mode to `original`.
On high-VRAM GPUs, add `--text-encoder-cpu-offload false` if text encoding latency matters and you have enough memory.