 |
|
| |
 |
Bandwidth | |
|
Internet Connectivity Comparison |
| Connection |
Speed | Time to Transmit 1 GB |
| Standard Modem | 56 Kbps
| 1 day, 18 hours, 37 min |
| 2 Channel ISDN | 128 Kbps
| 18 hours, 38 min, 29 sec |
| Common DSL | 512 Kbps
| 4 hours, 33 min, 4 sec |
| T1 Circuit | 1.544 Mbps
| 1 hour, 32 min, 43 sec |
| Ethernet | 10 Mbps
| 14 min, 19 sec |
| DS3 Pipe | 44.736 Mbps
| 3 min, 12 sec |
| OC3 / STM-1 | 155.52 Mbps
| 55.23 sec |
| OC12 / STM-4 | 622.08 Mbps
| 13.81 sec |
| OC48 / STM-16 | 2.488 Gbps
| 3.45 sec |
* All figures are approximated. |
|
| Server Specifications |
| Each physical root server hosts 30-50
Virtual Servers. Root servers have the following configuration:
| VPS v2 | VPS | Solaris VPS |
| UNIX O/S | FreeBSD 4.7 |
FreeBSD 4.4 | Solaris 8 |
| CPU(s) | Dual Intel Pentium 4 Xeon |
Dual 800 MHz Intel PIII | 440 MHz SPARC Ultra AXI |
| Main Memory | 4 GB DDR ECC | 2 GB 50 ns ECC Viking | 1 GB RAM |
| Drives | 3 10,000 RPM Seagate | 3 10,000 RPM Seagate | Three 36 GB HDDs |
| * Primary Volume | * Dual 146 GB, RAID 1 | * Dual 36 GB, RAID 1 | * Dual 36 GB, Live Mirror |
| * 24-Hour Backup | * 146 GB Volume | * 36 GB Volume | * 36 GB Volume |
 |
Servers use high speed Cisco
7500 routers and Cisco
5500 switches (96 full-duplex 100 Mbps ports each) which are equipped with redundant power supplies and redundant route processors.
We provide triple backups of customer's data via:
- Live mirror of user volume on secondary drive
- A compressed archive stored on system volume
- A digital tape archive
All Servers and networking equipment are supported by Liebert UPS with 1 hour battery,
backed up by a 250 kW Onan/Cummins diesel generator with 36 hours
of fuel. |
| |
|
