start lotus daemon

[dayou5168]

start lotus daemon

It is assumed that you have compiled the lotus. If you can't compile and install lotus, please check the previous content

The role Lotus Daemon play

For storage providers(SPs), the main role of Lotus is

• lotus-miner needs to interact with the chain via lotus, initialize miners, precommit sectors. provecommit sectors, wdpost, winningpost, all need to send messages to the chain

• transfer operations need to be performed via lotus

• Accessing and store data on filecoin as a client

You should remember the role lotus play. The problems you are experiencing with other components may be caused by Lotus.

set the location of Lotus daemon

The default storage location for Lotus is ~/.lotus. Sometimes there are multiple hard disks on your system and you must distinguish your target hard disk and specify LOTUS_PATH to the directory where the target hard disk is mounted before running the program. You can of course leave the default storage location as it is if it meets your requirements

start Lotus Daemon

nohup lotus daemon >> daemon.log 2>&1 &

Try to save the logs to a file for later troubleshooting. Lotus will sync the chain at the very beginning which will take a very long time and occupy so much disk space if you run Lotus Daemon from here. The full chain may need more than 7TB of disk space. typically we should sync the chain from the snapshot.

sync from snapshot and check sync status

lotus daemon stop

wget https://fil-chain-snapshots-fallback.s3.amazonaws.com/mainnet/minimal_finality_stateroots_latest.car

lotus daemon --import-snapshot minimal_finality_stateroots_latest.car --halt-after-import

nohup lotus daemon >> daemon.log 2>&1 &

lotus sync status
lotus sync wait #this will wait for the chain sync. you can press CTRL+C to cancel

if you got done when you run lotus sync wait. you got everything right.

change configure and export api info

You should change your configure file of Lotus if you want use Lotus remotely.
edit this section of config.toml

[API]
  # Binding address for the Lotus API
  #
  # type: string
  #ListenAddress = "/ip4/127.0.0.1/tcp/1234/http"

Uncomment #ListenAddress = "/ip4/127.0.0.1/tcp/1234/http" and change ListenAddress to your address you want to listen on like ListenAddress = "/ip4/192.168.0.100/tcp/1234/http"

Then restart lotus daemon and run:

lotus auth api-info --perm admin

You will got something like this FULLNODE_API_INFO=eyJhbGcXXXX:/ip4/127.0.0.1/tcp/1234/http. export this value to your remote machine. it will work.

prune the chain(optional)

Export the chain data:

lotus chain export --recent-stateroots=901 --skip-old-msgs my-snapshot.car

You can see logs like these when you export chain data

2021-09-15T14:51:52.558+0800 INFO chainstore store/snapshot.go:155 export started
....
2021-09-15T14:47:19.560+0800 INFO chainstore store/snapshot.go:166 export finished {"duration": 51.43478087}

Stop the Lotus daemon:

lotus daemon stop

Back up the chain data and create a directory for chain data:

mv ~/.lotus/datastore/chain ~/.lotus/datastore/chain_backup
mkdir ~/.lotus/datastore/chain 

Import the chain:

lotus daemon --import-snapshot my-snapshot.car --halt-after-import

Start the daemon:

nohup lotus daemon >> daemon.log 2>&1 &

Check sync status. check wallet before delete ~/.lotus/datastore/chain_backup

lotus sync status
lotus wallet list

typical questions

1: Can i run Lotus Daemon on HDD?

no

2: Why i sync chain slowly and never catch up?

the top reason why you sync slowly

• Most of the time. you may store chain data on HDD which write/read speed is not enough for Lotus Daemon.

• if you pretty sure you are store chain on SSD. check the disk space. SSD slows down when it runs out of space. you should prune the chain in this case.

• network issue.

3: Should i run Lotus Daemon with Lotus Miner or separate

At present, running separately is a good choice