Daemon using CRDTs fails to start on Raspberry Pi

[lanzafame]

Additional information:

• OS: linux
• IPFS Cluster version: master
• Installation method: built from source for ARM

Running ipfs-cluster-service daemon on a Raspberry Pi 3 B with CRDT consensus fails due to badger not being able to mmap memory.

$ ipfs-cluster-service daemon --consensus=crdt
06:07:40.790  INFO    service: Initializing. For verbose output run with "-l debug". Please wait... daemon.go:48
error creating datastore: Mmap value log file. Path=/home/pi/.ipfs-cluster/badger/000000.vlog. Error=cannot allocate memory

I found this badgerdb issue which is resolved and if I ran that main.go on the RPi, it worked but if I changed the options.ValueLogLoadingMode back to the default, which is to use options.MemoryMap, that example program fails.

@hsanjuan when you get the chance could you please confirm this?

The fix, if this is a problem, is to allow passing through the configuration of value for options.ValueLogLoadingMode to badger.

[hsanjuan]

@lanzafame ValueLogFileSize is set to 1GB by default. Can you try reducing it? How much RAM is there in these Raspberry Pis ? Ideally we would automatically handle this in systems with lower memory somehow. We can always expose [needed] badger options though.

[hsanjuan]

Closed by #776 and configuring file loading mode for badger.