SSS for cache

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Thanks for reaching out, and I’m glad to hear the DS923+ is serving you well! With your setup and workload, adding NVMe for cache is a great idea, especially given the variety of Docker containers and Surveillance Station in use.

Recommended NVMe SSDs for Caching:
Synology SNV3400-800G (800GB)

Designed specifically for Synology systems, with full compatibility and monitoring support through DSM.
Ideal for sustained workloads like surveillance and Docker containers.
Link: Synology SNV3400-800G (Affiliate link).
WD Red SN700

High endurance (1.0 DWPD), perfect for caching and 24/7 operations.
Cost-effective and reliable for your use case.
Link: WD Red SN700 (Affiliate link).
Seagate IronWolf 525

Optimized for NAS environments with good endurance and consistent performance.
Slightly more affordable than the Synology-branded NVMe.
Link: Seagate IronWolf 525 (Affiliate link).
Considerations:
Cache Type: Configure the NVMe for read-write cache if you’re handling frequent writes (like Surveillance Station recordings and Docker operations).
Capacity: ~800GB or 1TB is perfect for your 4-drive setup in SHR-2, balancing cost and performance.
Installation: Ensure you monitor cache hit rates in DSM to verify its impact on your workloads.