Pruning the Tangle

[jonastheis]

• data locality for blocks
• check out bucketed storage and see whether we can use it, need to modify
• break down tangle package
  • rename old one and use new "tangle" package as inner
  • new tangle package: storage, solidifier, requester, booker
• add caching: ORM style (use shrinking map) for metadata
  • use metadata only for inner component
  • sever connection between solid solid entry points when removing epoch out of cache
• generic component to trigger blocks in order (generic solidification)
• store blocks on arrival in bucketed storage
  • mark bucket as dirty on creation
  • once "everything" for an epoch is written, mark es clean