Performance Cases For Media And Streaming Platforms Using Vietnamese Cn2 Servers

1. overview: why media and streaming media choose vietnam cn2 node

1) vietnam cn2 provides high-quality backbone routing to mainland china and southeast asia. packet loss and jitter are significantly lower than ordinary international links.
2) for video on demand and live broadcast, stable routing can significantly reduce first-screen startup and re-buffering rates.
3) during peak traffic hours, cn2's load balancing and bgp policies reduce performance degradation caused by cross-border congestion.
4) direct connection with the local computer room reduces the number of transit hops, which helps reduce the delay of unicast and rtmp/hls transmission.
5) adapt to multi-homing (multi-homing) and anycast, and can be used as primary and secondary bandwidth/return-to-source channels to improve availability.

2. key points of technical architecture (routing, bandwidth and bgp policies)

1) use bgp multi-line announcement, use vietnam cn2 as the priority return path, and implement routing preference for china/southeast asia traffic.
2) deploy edge servers with 10gbps/40gbps network cards at nodes in vietnam to support software/hardware accelerated network forwarding.
3) configure mss/mtu and tcp optimization (congestion control, sack, window expansion) to improve video transmission efficiency.
4) use anycast+geoip offloading to point nearby users to the cn2 node in vietnam to reduce the number of transoceanic hops.
5) stratify traffic (control signaling, video fragmentation, cdn back-to-source) to facilitate refined scheduling and billing.

3. real case: performance comparison of an asian media company using vietnam’s cn2

1) customer background: regional media platform with average daily active users of 800,000 and peak concurrent live broadcast viewers of approximately 20,000.
2) goal: reduce the average first-screen startup time and jitter rate for users in mainland china, and improve concurrent carrying capacity.
3) deployment method: deploy two main physical servers + multiple cn2 back-to-origin vps in the vietnam computer room, combined with a multi-cdn back-to-origin strategy.
4) test dimensions: latency (ms), packet loss rate (%), first screen startup (s), concurrent load (number of concurrent users), bandwidth (mbps).
5) the results are shown in the table below (the data is a summary of real pressure measurement and production monitoring):

index	before adoption (legacy international link)	after adopting vietnam cn2
average latency (ms)	220	85
packet loss rate (%)	2.1	0.2
first screen launch(s)	4.8	2.1
peak concurrent load (people)	5,000	20,000+
average output bandwidth (mbps)	600	1,600

4. server and vps configuration examples (production-level configuration)

1) physical edge server example: intel xeon silver 4216 x 2, 32 cores (64 threads), ddr4 256gb, 2 x 2tb nvme (raid1), 10gbps network port.
2) cn2 back-to-origin vps example: 8 vcpu, 32gb ram, 200gb nvme, 1gbps guaranteed bandwidth, on-demand elastic limit up to 10gbps.
3) network configuration: bgp multi-line, anycast ip, mtu 9000 optional, tcp bbr + system-level network parameter optimization.
4) storage and caching: local nvme is used as hot data cache, and hierarchical object storage (s3) is used as cold data archiving.
5) operating system and middleware: ubuntu 22.04 / centos 8, nginx (with http/2, tls1.3, ocsp stapling), streaming media uses srt/rtmp combined with hls/dash packaging.

5. cdn, domain name and dns scheduling strategies

1) it is recommended to use a multi-cdn strategy: main cn2 back-to-origin + backup regular pop, and intelligent routing based on geo/operator.
2) domain name resolution: low ttl combined with dns load balancing enables rapid distribution of scheduling policies in case of sudden traffic.
3) ssl/certificate: enable tls1.3 on the entire site, use sni and configure automatic certificate renewal (acme).
4) back-to-origin optimization: aggregate vietnam cn2 nodes as the nearest back-to-source to reduce cross-regional back-to-source links.
5) caching strategy: set reasonable cache-control and shard packaging according to the size of the video shards to reduce the pressure of return-to-origin requests.

6. ddos defense and high availability practices

1) ddos protection level: computer room/operator side cleaning (black hole + forwarding) + cloud waf + application layer current limiting.
2) cleaning capability example: an actual case encountered an 80gbps syn flood. after upstream cleaning, the traffic recovered stably and the service was not significantly interrupted.
3) connection resource protection: set syn cookies, minimum handshake rate and connection rate limit to resist state exhaustion attacks.
4) elastic expansion: combined with the automatic expansion strategy and traffic threshold, the backup back-to-origin node is automatically pulled up during peak peaks.
5) monitoring and alarming: deploy real-time traffic/session/delay monitoring, and combine netflow/ipfix to trace the source of abnormal traffic.

7. deployment recommendations and conclusions

1) pilot a small amount of traffic first: select a small number of popular videos or live broadcast channels and send them back to vietnam cn2 to observe the improvement in indicators.
2) data-driven expansion: develop sla based on first screen, packet loss, and re-buffering rates, and decide whether to expand more cn2 nodes based on data.
3) the hybrid strategy is the most reliable: cn2+multi-cdn+local cache combination, which not only ensures low latency but also can cope with abnormal traffic.
4) pay equal attention to operation and security: sign an sla and emergency linkage mechanism with the bandwidth/cleaning supplier in advance, and practice failover regularly.
5) conclusion: for media and streaming media platforms targeting users in china and southeast asia, deploying vietnam cn2 nodes can significantly reduce latency, packet loss, and first-screen time, while improving concurrent hosting and overall availability. it is an effective solution that balances performance and cost.