Metrics

Storage

Name	Abbreviation	Size (base 2)	Conversion
bit	b	1/8
Byte	B	1	1 B = 8 b
Kilobyte	KB	2¹⁰	1 KB = 2¹⁰ B
Megabyte	MB	2²⁰	1 MB = 2¹⁰ KB
Gigabyte	GB	2³⁰	1 GB = 2¹⁰ MB
Terabyte	TB	2⁴⁰	1 TB = 2¹⁰ GB
Petabyte	PB	2⁵⁰	1 PB = 2¹⁰ TB
Exabyte	EB	2⁶⁰	1 EB = 2¹⁰ PB
Zettabyte	ZB	2⁷⁰	1 ZB = 2¹⁰ EB
Yottabyte	YB	2⁸⁰	1 YB = 2¹⁰ ZB

Queries per second (QPS): The number of queries (requests) a server can be responded to.
Transactions per second (TPS): The number of transactions a server can handle.
Response time (RT): The time period between the client sends a request and the client receives the response.
Concurrency: The number of requests/transactions can be handle concurrently.

QPS
- QPS is often associated with individual queries or requests
TPS
- TPS typically measures the rate of complete transactions, which may involve multiple requests.
Examples
- One transaction can be one access to a web page. But during this transaction, the client can send 3 requests to the server.