Interview Questions: differences between memcache and redis

1. Storage Method

• Memecache stores all data in the memory. After the power is down, the data cannot exceed the memory size.
• Some redis instances are stored on the hard disk to ensure data persistence.

2. supported data types

• Memcache supports relatively simple data types.
• Redis has complex data types.

3. Use different underlying models

• The underlying implementation methods and application protocols for communication between them and clients are different.
• Redis directly built its own VM mechanism, because the general system calls system functions, it will waste a certain amount of time to move and request.