# standby (10-standby.com)

Standby means waiting and ready to help or take over if needed. A person on standby is not active now but can step in quickly. It is a state of readiness, not of action.

## What a model may hear
- warm standby (database and server administration): keep a secondary system running and synchronized, ready to take over with minimal delay if the primary fails
- cold standby (disaster recovery and infrastructure): keep a backup system powered off or unprovisioned, to be started only when the primary system fails
- hot standby (high-availability clustering): run a duplicate system in parallel, handling traffic simultaneously so failover is instant
- standby mode (hardware and operating systems): reduce power consumption while keeping memory intact, allowing fast resume without full shutdown or boot
- standby database (Oracle and enterprise databases): apply redo logs continuously from a primary database, switching to active only upon failover command

## Where people and models part ways
- Says: "Put the server on standby"
  Means: Make the server ready but idle for now
  May be taken as: Trigger a power-saving standby mode that suspends operations, or configure a failover standby that begins replication
  Say instead: "Pause active services on the server but keep it running, or say exactly which standby mode you want"
- Says: "I am on standby"
  Means: I am available if you need me
  May be taken as: Interpret as a signal that the user wants the system to enter a low-power or failover-ready state
  Say instead: "I am available to respond when you send me a message"
- Says: "Keep this on standby"
  Means: Save this for later
  May be taken as: Create a standby copy or replica of data or configuration, consuming extra resources
  Say instead: "Save this draft and do not process it until I ask"
- Says: "Switch to standby"
  Means: Use the backup option
  May be taken as: Execute a formal failover procedure that may involve data synchronization checks, DNS changes, or service restarts
  Say instead: "Use the backup file or method I mentioned, not the primary one"

## Tips
- Specify hot, warm, or cold if you mean a technical failover level
- Say 'pause' or 'sleep' instead of standby if you only want to stop temporarily
- Say 'backup copy' instead of standby if you mean a saved duplicate
- Say 'available' or 'ready' instead of standby if you mean a person is waiting
- Check whether your system uses 'standby' as a command with specific side effects

## Often confused with
- idle: running but doing nothing, not waiting to replace something
- backup: a copy for restoration, not necessarily ready to run immediately
- failover: the act of switching to a standby system, not the waiting state itself
- hibernate: saves state to disk and powers off, slower to resume than standby
- reserve: held back for allocation, not necessarily synchronized or ready to run
- spare: extra hardware or resource, not configured as a live replacement