cache invalidation strategies for real-time data

hey everyon, ive been thinkin a lot about cachin lately, esp when dealin with data that changes frequently. we all know cachin can boost performance, but keepin that cache consistent with the source of truth is a real challenge. weve looked at ttl-based expiration, but it often leads to stale data or unnecessarily frequent reloads. writethrough cachin adds latency, and writebehind can risk data loss if not managed perfectly. what strategies or patterns have you found effective for cache invalidation, particulary when real-time or near real-time accuracy is critical? are there specific tools or architectural patterns that make this easier