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Add docs for NewerNoncurrentVersions (#13944)

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Krishnan Parthasarathi 2021-12-17 19:32:29 -08:00 committed by GitHub
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docs/bucket/lifecycle/README.md
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@ -82,27 +82,52 @@ e.g., To scan objects stored under `user-uploads/` prefix and remove versions ol
``` ```
### 3.2 Automatic removal of noncurrent versions older than most recent ### 3.2 Automatic removal of noncurrent versions keeping only most recent ones after noncurrent days
It is possible to configure automatic removal of noncurrent versions older than the most recent `N` using MinIO specific lifecycle policy extension `MaxNoncurrentVersions`. It is possible to configure automatic removal of older noncurrent versions keeping only the most recent `N` using `NewerNoncurrentVersions`.
e.g, To remove noncurrent versions of all objects older than most recent 5 noncurrent versions under the prefix `user-uploads/`, e.g, To remove noncurrent versions of all objects keeping the most recent 5 noncurrent versions under the prefix `user-uploads/` 30 days after they become noncurrent ,
``` ```
{ {
"Rules": [ "Rules": [
{ {
"ID": "Remove noncurrent versions older than", "ID": "Keep only most recent 5 noncurrent versions",
"Status": "Enabled", "Status": "Enabled",
"Filter": { "Filter": {
"Prefix": "users-uploads/" "Prefix": "users-uploads/"
}, },
"NoncurrentVersionExpiration": { "NoncurrentVersionExpiration": {
"MaxNoncurrentVersions": 5 "NewerNoncurrentVersions": 5,
"NoncurrentDays": 30
} }
} }
] ]
} }
``` ```
#### 3.2.a Automatic removal of noncurrent versions keeping only most recent ones immediately (MinIO only extension)
This is available only on MinIO as an extension to the NewerNoncurrentVersions feature. The following rule makes it possible to remove older noncurrent versions
of objects under the prefix `user-uploads/` as soon as there are more than `N` noncurrent versions of an object.
```
{
"Rules": [
{
"ID": "Keep only most recent 5 noncurrent versions",
"Status": "Enabled",
"Filter": {
"Prefix": "users-uploads/"
},
"NoncurrentVersionExpiration": {
"NewerNoncurrentVersions": 5
}
}
]
}
```
Note: This rule has an implicit zero NoncurrentDays, which makes the expiry of those 'extra' noncurrent versions immediate.
### 3.3 Automatic removal of delete markers with no other versions ### 3.3 Automatic removal of delete markers with no other versions
When an object has only one version as a delete marker, the latter can be automatically removed after a certain number of days using the following configuration: When an object has only one version as a delete marker, the latter can be automatically removed after a certain number of days using the following configuration: