# Repack-in-Place

{% hint style="info" %}

* When repacking you do not need a private key - you will only need a mining address (aka packing address)
* Your mining address is **not** a private key - it is a public address
* For the following examples we will alway use `En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI` and `Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY` as mining addresses. **Replace them with your own address(es) before running the sample commands.**
  {% endhint %}

## 1. Overview

* You've been solo mining against 4 partitions of packed data
* You want to repack it so you can join a mining pool
* You want to repack in place so you don't need any extra storage capacity
* Your packed data is stored on 4TB disks and is packed using the mining address `En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI`
* You want to repack your data to the mining address `Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY`
* You'll use one of the DHA-provided public VDF servers
* You'll use the publicly available NSFW filter provided by Shepherd
* **NOTE** Unlike with the other two repacking processes ("Sync and Pack" and "Cross-Module Repack"), you will **not** need to split up the "Repacking in Place" process into two steps. Entropy generation and repacking will happen in a single step.
* Run your miner with:
  * the special `repack_in_place` syntax for your storage modules
* After the repack in place completes you'll need to rename all your storage module directories
* See [Running Your Node](https://docs.arweave.org/developers/mining/getting-started/configuration) for more information

2. Sample Directory Structure

* Mount points for 4TB disks that store your packed data:
  * `/mnt/a`
  * `/mnt/b`
  * `/mnt/c`
  * `/mnt/d`
* `data_dir`: `/opt/data`
* Storage module symlinks:
  * `/opt/data/storage_modules/storage_module_0_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9` -> `/mnt/a`
  * `/opt/data/storage_modules/storage_module_1_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9` -> `/mnt/b`
  * `/opt/data/storage_modules/storage_module_2_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9` -> `/mnt/c`
  * `/opt/data/storage_modules/storage_module_3_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9` -> `/mnt/d`
* Wallets: no wallet.json needed since you are only packing

3. Sample Command-line Configuration

```
./bin/start \
    enable randomx_large_pages \
    peer peers.arweave.xyz \
    data_dir /opt/data \
    sync_jobs 200 \
    vdf_server_trusted_peer vdf-server-3.arweave.xyz \
    transaction_blacklist_url https://public_shepherd.arweave.net \
    mining_addr Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY \
    storage_module 0,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9 \
    storage_module 1,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9 \
    storage_module 2,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9 \
    storage_module 3,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9 
```

4. Sample Configuration File (config.json)

```
{
    "enable": [ "randomx_large_pages" ],
    "peers": [ "peers.arweave.xyz" ],
    "data_dir": "/opt/data",
    "vdf_server_trusted_peers": [ "vdf-server-3.arweave.xyz" ],
    "transaction_blacklist_urls": [ "https://public_shepherd.arweave.net" ],

    "storage_modules": [
        "0,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9",
        "1,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9",
        "2,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9",
        "3,En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZRI.replica.2.9,repack_in_place,Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9"
    ],
     
    "mining_addr": "Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY",

    "sync_jobs": 200
  }

```

{% hint style="warning" %}
After repacking in place has completed, stop your node and rename your directories, eg.

```
mv /opt/data/storage_modules/storage_module_0_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZR.replica.2.9 /opt/data/storage_modules/storage_module_0_Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9

mv /opt/data/storage_modules/storage_module_1_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZR.replica.2.9 /opt/data/storage_modules/storage_module_1_Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9

mv /opt/data/storage_modules/storage_module_2_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZR.replica.2.9 /opt/data/storage_modules/storage_module_2_Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9

mv /opt/data/storage_modules/storage_module_3_En2eqsVJARnTVOSh723PBXAKGmKgrGSjQ2YIGwE_ZR.replica.2.9 /opt/data/storage_modules/storage_module_3_Q5EfKawrRazp11HEDf_NJpxjYMV385j21nlQNjR8_pY.replica.2.9
```

{% endhint %}