| Powers of 10 | Words | Bytes |
|---|---|---|
| 103 | thousand | kilobyte |
| 106 | million | megabyte |
| 109 | billion | gigabyte |
| 1012 | trillion | terabyte |
| 1015 | quadrillion | petabyte |
| Powers of 2 | Decimal | Bytes | Words |
|---|---|---|---|
| 28 | 256 | 1 byte | - |
| 216 | 65,536 | 2 bytes | 65 thousand |
| 224 | 16,777,216 | 3 bytes | 16 million |
| 232 | 4,294,967,296 | 4 bytes | 4 billion |
| 240 | 1,099,511,627,776 | 5 bytes | 1 trillion |
| 248 | - | 6 bytes | 281 trillion |
| 256 | - | 7 bytes | 72 quadillion |
| 264 | - | 8 bytes | 9.2 quintillion |
| Type | Size |
|---|---|
| bool | 1 byte |
| char | 1 byte |
| short | 2 bytes |
| float | 4 bytes |
| int | 4 bytes |
| long | 4 bytes |
| pointer (32-bit) | 4 bytes |
| double | 8 bytes |
| long long | 8 bytes |
| pointer (64-bit) | 8 bytes |
| Type | Size |
|---|---|
| boolean | 1 byte |
| char | 2 bytes |
| short | 2 bytes |
| float | 4 bytes |
| int | 4 bytes |
| double | 8 bytes |
| long | 8 bytes |
- 1 hour = 3,600 seconds
- 1 day = 86,400 seconds
| Availability % | Downtime per Year |
|---|---|
| 90% ("one nine") | 36.5 days |
| 99% ("two nines") | 3.65 days |
| 99.9% ("three nines") | 9 hours |
| 99.99% ("four nines") | 50 minutes |
| 99.999% ("five nines") | 5 minutes |
- 1,000 RPS is not difficult to achieve on a normal server for a regular service.
- 2,000 RPS is a decent amount of load for a normal server for a regular service.