Tracker Server

How to config the tracker server?

System Memory

numOfSupportPeers and numOfSupportTorrents

 Minimum Memory: N * 8 Bytes
       131,072 Peers: ~  1MB
     1,048,576 Peers: ~  8MB
   134,217,728 Peers: ~  1GB
 4,294,967,295 Peers: ~ 32GB
 UINT32_MAX = 4,294,967,295

 Minimum Memory: N * (1052) Bytes
         1,024 Torrent: ~  1MB
        65,536 Torrent: ~ 66MB
     1,048,576 Torrent: ~  1GB
 4,294,967,295 Torrent: ~  4TB
 16384 Torrents and Torrent-Peers Table: ~16.437MB

Broadband speed

IPv4 UDP size: 28 bytes
AnnounceRequest:  28+98      =  126 bytes
AnnounceResponse: 28+20+(N*6)= 48+? bytes
                28+20+(200*6)= 1248 bytes

Request(Download):
100Mbps:    ~104,025 QPS
  1Gbps:  ~1,040,253 QPS
2.5Gbps:  ~2,600,634 QPS
 10Gbps: ~10,402,539 QPS
 40Gbps: ~41,610,156 QPS
100Gbps:~104,025,390 QPS

Response(Upload):
100Mbps:    ~10,502 QPS
  1Gbps:   ~105,025 QPS
2.5Gbps:   ~262,564 QPS
 10Gbps: ~1,050,256 QPS
 40Gbps: ~4,201,024 QPS
100Gbps:~10,502,560 QPS

CPU speed

The execution time per query on a single physical core: ~20 μs(2.0Ghz)
(1,000,000(seconds factor) / 20 μs(Per query) * (Num of core) = QPS
Example:
1,000,000 / 20 * 8   =   ~400,000 QPS
1,000,000 / 20 * 64  = ~3,200,000 QPS
1,000,000 / 20 * 128 = ~6,400,000 QPS
 
(Num of Online Peers) / (announce interval seconds) = Queries Per Second (QPS)
4,294,967,295 (Online Peers) / 300 ( 5 minutes) =~14,316,558 QPS
4,294,967,295 (Online Peers) / 600 (10 minutes) =~ 7,158,278 QPS
4,294,967,295 (Online Peers) / 900 (15 minutes) =~ 4,772,186 QPS

Memory speed