By default, the temporary security credentials created by AssumeRoleWithWebIdentity last for one hour. However, the optional DurationSeconds parameter can be used to specify the validity duration of the generated credentials. This value varies from 900 seconds (15 minutes) up to the maximum session duration of 365 days.

## Configuring OpenID Identity Provider on MinIO

Each endpoint below can be queried at different intervals as needed via a scrape configuration in Prometheus or a compatible metrics collection tool.

For ease of configuration, each (non-empty) parent of the path serves all metric endpoints that are at descendant paths. For example, to query all system metrics one needs to only scrape `/minio/metrics/v3/system/`.

  The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form.  A

| 64-bit ARM                     | <https://dl.min.io/server/minio/release/linux-arm64/minio>   |
| 64-bit PowerPC LE (ppc64le)    | <https://dl.min.io/server/minio/release/linux-ppc64le/minio> |
| IBM Z-Series (S390X)           | <https://dl.min.io/server/minio/release/linux-s390x/minio>   |

- MinIO looks up the user's information (specifically the user's Distinguished Name) in the LDAP server.
- On finding the user's info, MinIO verifies the login credentials with the AD/LDAP server.
- MinIO optionally queries the AD/LDAP server for a list of groups that the user is a member of.
- MinIO then checks if there are any policies [explicitly associated](#managing-usergroup-access-policy) with the user or their groups.

## Overview

mapreduce.job.reduce.slowstart.completedmaps=0.99 # 99% map, then reduce
mapreduce.reduce.shuffle.input.buffer.percent=0.9 # Min % buffer in RAM
mapreduce.reduce.shuffle.merge.percent=0.9 # Minimum % merges in RAM
mapreduce.reduce.speculative=false # Disable speculation for reducing
mapreduce.task.io.sort.factor=999 # Threshold before writing to disk
mapreduce.task.sort.spill.percent=0.9 # Minimum % before spilling to disk
```