So the size of my chaindata folder has snowballed to close to 80GB. Is there a way to reduce it or is the only way to delete it and resync geth with --syncmode fast?


1 Answer 1


Yes, you can do the --fast mode to reduce the chain data size. And yes, you can delete the old chaindata.

  • 2
    Will that prune existing data or are you suggesting deleting and resyncing? Jun 17, 2017 at 4:18
  • Exactly, when I try running it with --fast, I get a warning "Blockchain not empty, fast sync disabled"
    – Tomas Vrba
    Jun 17, 2017 at 4:30
  • That was my worry. My internet is super slow right now so didn't want to have to re-sync it, even with --fast mode. Oh well, I'll do it later :)
    – Tomas Vrba
    Jun 17, 2017 at 16:37

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