quick OpenIO implementation (team#40478)

policy/tpa-rfc-56-large-file-storage.md

@@ -191,19 +191,7 @@ Counter examples:
 
 # Alternatives considered
 
-## Throw hardware at it
-
-## TODO: brainstorm ideas to triage
-
-just throwing ideas out there.
-
-object storage options:
-
- * [openio][] mentioned in one of the GitLab threads, not evaluated,
-   python, main website down: https://www.openio.io/
-   (`SSL_ERROR_NO_CYPHER_OVERLAP`)
-
-[openio]: https://www.openio.io/
+## TODO: Throw hardware at it
 
 ## TODO triage meeting brainstorm
 
@@ -395,6 +383,53 @@ News discussion][30256753] and [this other one][33853539].
 
 TODO: review https://github.com/seaweedfs/seaweedfs
 
+## OpenIO
+
+The [openio][] project mentioned in one of the GitLab threads. The
+main website (<https://www.openio.io/>) seems down
+(`SSL_ERROR_NO_CYPHER_OVERLAP`) but some information can be gleamed
+from the [documentation site](https://docs.openio.io/).
+
+It is not packaged in Debian.
+
+Features:
+
+ * Object Storage (S3)
+ * OpenStack Swift support
+ * minimal hardware requirements (1 CPU, 512MB RAM, 1 NIC, 4GB
+   storage)
+ * no need to pre-plan cluster size
+ * dynamic load-balancing
+ * multi-tenant
+ * progressive offloading to avoid rebalancing
+ * lifecycle management, versioning, snapshots
+ * no single point of failure
+ * geo-redundancy
+ * [metadata indexing](https://docs.openio.io/latest/source/arch-design/metadata_indexing.html)
+
+Downsides, missing features:
+
+ * [partial S3 implementation](https://docs.openio.io/latest/source/arch-design/s3_compliancy.html), notably missing:
+   * encryption? the above S3 compatibility page says it's
+     incompatible, but [this page says it is implemented](https://docs.openio.io/latest/source/admin-guide/configuration_encryption.html#label-encryption-configuration), unclear
+   * website hosting
+   * bucket policy
+   * bucket replication
+   * bucket notifications
+ * a lot of "open core" features ("part of our paid plans", which is
+   difficult to figure out because [said plans](https://www.openio.io/plans) are not visible in
+   latest Firefox because of aforementioned "SSL" issue)
+   * [OpenIO FS](https://docs.openio.io/latest/source/arch-design/fs_overview.html)
+   * [IAM](https://docs.openio.io/latest/source/arch-design/iam.html)
+ * [design seems awfully complicated](https://docs.openio.io/latest/source/arch-design/sds_concepts.html#sequence-diagram-put)
+ * requires disabling apparmor (!?)
+ * [supported OS page](https://docs.openio.io/latest/source/sandbox-guide/linux_support.html) clearly out of date or not supporting stable
+   Debian releases
+ * no release in almost a year (as of 2023-06-28, last release is from
+   August 2022)
+
+[openio]: https://www.openio.io/
+
 ## Ceph
 
 [Ceph](https://ceph.io/en/) is ([according to Wikipedia](https://en.wikipedia.org/wiki/Ceph_(software))) a "software-defined storage