# How to run a Erigon Nitro node for Arbitrum Sepolia

With the release of Erigon Nitro v0.1 we are happy to announce a significant achievement. On the Sepolia testnet, we have successfully reduced the archive node size from approximately **12 TB to just 713 GB**, which is a **94% reduction**. This substantial compression simplifies node operation and lowers the storage costs for developers and infrastructure providers.

> *More information on our blog <https://erigon.tech/introducing-erigon-nitro-for-arbitrum-sepolia/>.*

## How to run Erigon Nitro for Sepolia

Erigon Nitro v0.1 for the Sepolia testnet is now ready for testing, and we would love your feedback. To start an Erigon Nitro node, simply use this Docker command:

mkdir /disk/datadir && \
docker run -d -v /disk/datadir/:/home/user/erigon-data/ erigontech/nitro-erigon:main-fe4c973 --torrent.download.rate=10G --prune.mode=archive --l2rpc="http://rpcserver:port --sync.loop.block.limit 100000

- **Arbitrum Sequencer**: We're currently working on adding support for the Arbitrum Sequencer. Until that work is complete, you must point Erigon to an external L2 Arbitrum RPC to get the most recent transactions and blocks. This can be either a pruned Nitro node you operate or a publicly available RPC. Any data beyond that is queried via the configured `l2rpc` during setup and synchronization, so keep this in mind when bringing a node online.
- **RPC compatibility**: Before declaring full Arbitrum One support, we are targeting complete RPC compatibility with the Nitro node. Please note that the `timeboosted` field will remain unavailable until Sequencer integration is complete.

For more recent versions, please check <https://hub.docker.com/r/erigontech/nitro-erigon/tags>.