comparision

Example Input

file1.txt

shard1 host1:6379 host2:6379 host3:6379
shard2 host4:6379 host5:6379 host6:6379

file2.txt

shard1 host1:6379 host2:6379 host3:6379
shard2 host4:6379 host5:9999 host6:6379


Python script to compare

def parse_file(filename):
    """Read shard -> hosts mapping from file."""
    shards = {}
    with open(filename, "r") as f:
        for line in f:
            parts = line.strip().split()
            if not parts:
                continue
            shard = parts[0]
            hosts = parts[1:]
            shards[shard] = set(hosts)  # use set for easy comparison
    return shards


def compare_shards(file1, file2):
    shards1 = parse_file(file1)
    shards2 = parse_file(file2)

    all_shards = set(shards1.keys()) | set(shards2.keys())

    for shard in sorted(all_shards):
        hosts1 = shards1.get(shard, set())
        hosts2 = shards2.get(shard, set())

        if hosts1 == hosts2:
            print(f"✅ {shard} is consistent in both files")
        else:
            print(f"❌ {shard} mismatch")
            if hosts1 - hosts2:
                print(f"   Present only in {file1}: {hosts1 - hosts2}")
            if hosts2 - hosts1:
                print(f"   Present only in {file2}: {hosts2 - hosts1}")


# Example usage
compare_shards("file1.txt", "file2.txt")


Output for example

✅ shard1 is consistent in both files
❌ shard2 mismatch
   Present only in file1.txt: {'host5:6379'}
   Present only in file2.txt: {'host5:9999'}
 
 
 Enhanced program
 
 
 
 
def parse_file(filename):
    """Read shard -> hosts mapping from file."""
    shards = {}
    with open(filename, "r") as f:
        for line in f:
            parts = line.strip().split()
            if not parts:
                continue
            shard = parts[0]              # first word = shard name
            hosts = parts[1:]             # rest = host list
            shards[shard] = set(hosts)    # store as set
    return shards


def compare_shards(file1, file2):
    shards1 = parse_file(file1)
    shards2 = parse_file(file2)

    all_shards = set(shards1.keys()) | set(shards2.keys())  # union of all shard names

    for shard in sorted(all_shards):
        hosts1 = shards1.get(shard, set())
        hosts2 = shards2.get(shard, set())

        if hosts1 == hosts2:
            print(f"[OK] {shard} is consistent in both files")
        else:
            print(f"[MISMATCH] {shard}")

            if shard not in shards1:
                print(f"   {shard} is missing in {file1}")
            if shard not in shards2:
                print(f"   {shard} is missing in {file2}")

            # Compare hosts in detail
            extra_in_file1 = hosts1 - hosts2
            extra_in_file2 = hosts2 - hosts1

            if extra_in_file1:
                print(f"   Present only in {file1}:")
                for h in sorted(extra_in_file1):
                    print(f"      {h}")

            if extra_in_file2:
                print(f"   Present only in {file2}:")
                for h in sorted(extra_in_file2):
                    print(f"      {h}")


# Example usage
if __name__ == "__main__":
    compare_shards("file1.txt", "file2.txt")
 
 Output
 
 
python3 comp.py file1 file2

[OK] shard1 is consistent in both files
[MISMATCH] shard2
   Present only in file1.txt:
      host5:6379
   Present only in file2.txt: