cmd.Flags().Uint64(optionNameDBCapacity,1000000,fmt.Sprintf("db capacity in chunks, multiply by %d to get approximate capacity in bytes",swarm.ChunkSize))
cmd.Flags().Uint64(optionNameCacheCapacity,1000000,fmt.Sprintf("cache capacity in chunks, multiply by %d to get approximate capacity in bytes",swarm.ChunkSize))
cmd.Flags().Uint64(optionNameDBOpenFilesLimit,200,"number of open files allowed by database")
cmd.Flags().Uint64(optionNameDBBlockCacheCapacity,32*1024*1024,"size of block cache of the database in bytes")
cmd.Flags().Uint64(optionNameDBWriteBufferSize,32*1024*1024,"size of the database write buffer in bytes")