Quicksync

Download the latest Cronos Chain snapshots to accelerate node setup and maintain sync with current network data

Introduction

The Cronos team has partnered with Chainlayer to provide the Quicksync service and make the process more efficient for our users.

Users can visit Chainlayer QuickSync Cronos page and download the snapshots for Cronos Chain with different pruning settings.

IMPORTANT

In order to use Quicksync you need to first complete Step 3-2 with the latest binary.

Note that as of v0.9.0, we have merged the binary to support both levelDB and rocksDB. Therefore, make sure to select the right app-db-backendin your app.toml.

Step 1: Quicksync Download

After executing the command ./cronosd start at Step 3-2 Run everything, it starts the node and syncs the blockchain data. When you see it starts to sync from 0, you can terminate the terminal. Both RocksDB and LevelDB snapshots are now available for Cronos Chain.

Step 2: Quicksync Extract

To start with Quicksync, you need to run brew install lz4 to install lz4 in a new terminal. Then download the file with preferred pruning settings directly from Quicksync.

Step 3: Quicksync Setup

In the following steps, we will take as an example the version cronosmainnet_25-1-pruned.20220309.2010.tar.lz4.

• (Optional) you can download an addressbook from Quicksync to get connected to peers faster. After downloading it, place the new addrbook.json under .cronos/config folder and restart your node to take effect.

• Now add the cronosmainnet_25-1-pruned.20220309.2010.tar.lz4 inside .cronos

Then perform the following steps:

• Change the path under .cronos with cd .cronos

• Decompress with lz4 and tar by lz4 -d /Users/<username>/.cronos/cronosmainnet_25-1-pruned.20220308.2010.tar.lz4 | tar -xv, as below:

Example: Decompress the QuickSync pack with lz4

  x data/
  x data/application.db/
  x data/application.db/84856034.ldb
  x data/application.db/83264153.ldb
  ...
  x data/snapshots/metadata.db/CURRENT.bak
  x data/snapshots/metadata.db/MANIFEST-000107
  x data/snapshots/metadata.db/LOG

The original data folder under .cronos is overwritten with this step (it takes around 5-7 mins to decompress the pruned version ~50GB).

Step 4: Sync with Quicksync

Example: Restart cronosd start with QuickSync

  $ ./cronosd start
  6:59PM INF Unlocking keyring
  6:59PM INF starting ABCI with Tendermint
  6:59PM INF Starting multiAppConn service impl=multiAppConn module=proxy server=node
  6:59PM INF Starting localClient service connection=query impl=localClient module=abci-client server=node
  ...
  6:59PM INF ABCI Replay Blocks appHeight=1813707 module=consensus server=node stateHeight=1813707 storeHeight=1813707