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docs: rebrand the repository documentation, templates and dashboards
README, README_ZH, SECURITY, COMPLIANCE, CONTRIBUTING, NOTICE, code_of_conduct, the vulnerability and PR-etiquette documents, the GitHub issue and pull request templates, and the docs/ tree all present Silo as the product. The Grafana dashboards under docs/metrics/prometheus/grafana/ have their panel titles and descriptions rebranded while every minio_* query, label and expression is left alone, so existing alerts and recording rules keep matching. The distinction the review demanded is applied per hit rather than by search-and-replace: - Product and command text becomes Silo and silo: install and run instructions, systemd examples, compose services, download links, badges. - Protocol and interface text keeps MinIO: MINIO_* variables, minio_* metrics, x-minio-* headers, /minio/* routes, .minio.sys, arn:minio, and API field and error names. - Attribution keeps MinIO and gains the fork's own: the AGPL obligations, original copyright, CREDITS and NOTICE stay, with the modification notice added alongside rather than replacing them. - Historical and third-party references are left as facts, not rewritten for brand tidiness. README and README_ZH each carry an explicit non-affiliation notice, document the side-by-side package migration including the /etc/systemd/system/silo.service.d/10-legacy-user.conf drop-in for keeping a legacy UID/GID, and state that recursive chown is never performed. The trademark attribution uses the policy's approved "based on MinIO technology" wording, not the shortened form the policy rejects. github.com/pgsty/minio links are left in place and labelled transitional. The repository has not been renamed, and rewriting them now would produce documented URLs that 404 until the cutover; they change in the cutover commit together with the goreleaser release target, the OCI source label and the raw-content branch. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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# Bucket Replication Design [](https://slack.min.io) [](https://hub.docker.com/r/minio/minio/)
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# Bucket Replication Design [](https://hub.docker.com/r/pgsty/silo/)
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This document explains the design approach of server side bucket replication. If you're looking to get started with replication, we suggest you go through the [Bucket replication guide](https://github.com/pgsty/minio/blob/master/docs/bucket/replication/README.md) first.
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All replication failures are picked up by the scanner which runs at a one minute frequency, each time scanning up to a sixteenth of the namespace. Object versions marked `PENDING` or `FAILED` are re-queued for replication.
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Replication speed depends on the cluster load, number of objects in the object store as well as storage speed. In addition, any bandwidth limits set via `mc admin bucket remote add` could also contribute to replication speed. The number of workers used for replication defaults to 100. Based on network bandwidth and system load, the number of workers used in replication can be configured using `mc admin config set alias api` to set the `replication_workers`. The prometheus metrics exposed by MinIO can be used to plan resource allocation and bandwidth management to optimize replication speed.
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Replication speed depends on the cluster load, number of objects in the object store as well as storage speed. In addition, any bandwidth limits set via `mc admin bucket remote add` could also contribute to replication speed. The number of workers used for replication defaults to 100. Based on network bandwidth and system load, the number of workers used in replication can be configured using `mc admin config set alias api` to set the `replication_workers`. The prometheus metrics exposed by Silo can be used to plan resource allocation and bandwidth management to optimize replication speed.
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If synchronous replication is configured above, replication is attempted right away prior to returning the PUT object response. In the event that the replication target is down, the `X-Amz-Replication-Status` is marked as `FAILED` and resynced with target when the scanner runs again.
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Any metadata changes on the source object version, such as metadata updates via PutObjectTagging, PutObjectRetention, PutObjectLegalHold and COPY api are replicated in a similar manner to target version, with the `X-Amz-Replication-Status` again cycling through the same states.
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The description above details one way replication from source to target w.r.t incoming object uploads and metadata changes to source object version. If active-active replication is configured, any incoming uploads and metadata changes to versions created on the target, will sync back to the source and be marked as `REPLICA` on the source. AWS, as well as MinIO do not by default sync metadata changes on a object version marked `REPLICA` back to source. This requires a setting in the replication configuration called [replica modification sync](https://aws.amazon.com/about-aws/whats-new/2020/12/amazon-s3-replication-adds-support-two-way-replication/).
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The description above details one way replication from source to target w.r.t incoming object uploads and metadata changes to source object version. If active-active replication is configured, any incoming uploads and metadata changes to versions created on the target, will sync back to the source and be marked as `REPLICA` on the source. AWS, as well as Silo do not by default sync metadata changes on a object version marked `REPLICA` back to source. This requires a setting in the replication configuration called [replica modification sync](https://aws.amazon.com/about-aws/whats-new/2020/12/amazon-s3-replication-adds-support-two-way-replication/).
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For active-active replication, automatic failover occurs on `GET/HEAD` operations if object or object version requested qualifies for replication and is missing on one site, but present on the other. This allows the applications to take full advantage of two-way replication even before the two sites get fully synced.
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### Replication of DeleteMarker and versioned Delete
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MinIO allows DeleteMarker replication and versioned delete replication by setting `--replicate delete,delete-marker` while setting up replication configuration using `mc replicate add`. The MinIO implementation is based on V2 configuration, however it has been extended to allow both DeleteMarker replication and replication of versioned deletes with the `DeleteMarkerReplication` and `DeleteReplication` fields in the replication configuration. By default, this is set to `Disabled` unless the user specifies it while adding a replication rule.
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Silo allows DeleteMarker replication and versioned delete replication by setting `--replicate delete,delete-marker` while setting up replication configuration using `mc replicate add`. The Silo implementation is based on V2 configuration, however it has been extended to allow both DeleteMarker replication and replication of versioned deletes with the `DeleteMarkerReplication` and `DeleteReplication` fields in the replication configuration. By default, this is set to `Disabled` unless the user specifies it while adding a replication rule.
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Similar to object version replication, DeleteMarker replication also cycles through `PENDING` to `COMPLETED` or `FAILED` states for the `X-Amz-Replication-Status` on the source when a delete marker is set (i.e. performing `mc rm` on an object without specifying a version).After replication syncs the delete marker on the target, the DeleteMarker on the target shows `X-Amz-Replication-Status` of `REPLICA`. The status of DeleteMarker replication is returned by `X-Minio-Replication-DeleteMarker-Status` header on `HEAD/GET` calls for the delete marker version in question - i.e with `mc stat --version-id dm-version-id`
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## Explore Further
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- [MinIO Bucket Versioning Implementation](https://silo.pgsty.com/administration/object-management/object-versioning/)
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- [MinIO Client Quickstart Guide](https://silo.pgsty.com/reference/minio-mc/#quickstart)
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- [Silo Bucket Versioning Implementation](https://silo.pgsty.com/administration/object-management/object-versioning/)
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- [Silo Client Quickstart Guide](https://silo.pgsty.com/reference/minio-mc/#quickstart)
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