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Software Engineering vocabulary · Debugging and Troubleshooting

SLO

Meaning in software engineering, with examples

abbreviationAdvanced term

In software engineering, SLO means: Short for service level objective: an internal reliability target for a service, such as 99.9 percent of requests succeeding over 30 days.

In Turkish: hizmet düzeyi hedefi, SLO

How it is used

Said letter by letter. An SLO is measured with an SLI (service level indicator), such as success rate or latency. The allowed failure, here 0.1 percent, is the 'error budget'; when it runs out, teams slow down releases.

Example sentences

  1. Our SLO for the login API is 99.95 percent of requests under 300 milliseconds.

  2. We missed the SLO this month, so the team will focus on reliability work.

Common collocations

  • set an SLO
  • meet the SLO
  • error budget
  • SLI
  • SLAShort for service level agreement: a contract that promises customers a certain level of service, such as 99.9 percent uptime, and says what happens if it is not met.
  • SREShort for site reliability engineering: using software engineering methods to run production systems reliably. It also names the engineer who does this work.
  • uptimeThe time or percentage of time that a system is working and available, often written as a figure such as 99.9 percent over a month or a year.
  • latencyThe time a request or piece of data takes to travel through a system and get a response, usually measured in milliseconds.
  • metricA number measured regularly over time to show how a system is behaving, such as CPU use, memory, request count or error rate.

This word in other fields

The same English word can have a different meaning in another field:

More terms: Debugging and Troubleshooting

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