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Various improvements in replication (#11949)

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- collect real time replication metrics for prometheus.
- add pending_count, failed_count metric for total pending/failed replication operations.

- add API to get replication metrics

- add MRF worker to handle spill-over replication operations

- multiple issues found with replication
- fixes an issue when client sends a bucket
 name with `/` at the end from SetRemoteTarget
 API call make sure to trim the bucket name to 
 avoid any extra `/`.

- hold write locks in GetObjectNInfo during replication
  to ensure that object version stack is not overwritten
  while reading the content.

- add additional protection during WriteMetadata() to
  ensure that we always write a valid FileInfo{} and avoid
  ever writing empty FileInfo{} to the lowest layers.

Co-authored-by: Poorna Krishnamoorthy <poorna@minio.io>
Co-authored-by: Harshavardhana <harsha@minio.io>
This commit is contained in:
Poorna Krishnamoorthy
2021-04-03 09:03:42 -07:00
committed by GitHub
parent dca7cf7200
commit 47c09a1e6f
36 changed files with 1914 additions and 496 deletions
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docs/metrics/prometheus/list.md
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@@ -12,6 +12,7 @@ These metrics can be from any MinIO server once per collection.
|`minio_bucket_replication_pending_bytes` |Total bytes pending to replicate. |
|`minio_bucket_replication_received_bytes` |Total number of bytes replicated to this bucket from another source bucket. |
|`minio_bucket_replication_sent_bytes` |Total number of bytes replicated to the target bucket. |
|`minio_bucket_replication_pending_count` |Total number of replication operations pending for this bucket. |
|`minio_bucket_usage_object_total` |Total number of objects |
|`minio_bucket_usage_total_bytes` |Total bucket size in bytes |
|`minio_cache_hits_total` |Total number of disk cache hits |