ChainFilesystem

[kbond]

• accepts multiple filesystems
• syncDown(): syncs files from first filesystem down to all others
• syncUp(): syncs files from last filesystem up to all others
• strategies
  • read-first-write-all: reads only from the first filesystem, writes to all
  • read-first-write-first: reads/writes only to the first filesystem
  • read-first-write-first-defer-all: reads/writes to the first filesystem synchronously and writes to the others asynchronously