# Datomic Cloud 1253-9431

**URL:** <https://forum.datomic.com/t/datomic-cloud-1253-9431/2631>\
**Category:** Announcements\
**Created:** [July 1, 2026, 6:53pm UTC](https://forum.datomic.com/t/datomic-cloud-1253-9431/2631 "2026-07-01T18:53:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [July 1, 2026, 6:53pm UTC](https://forum.datomic.com/t/datomic-cloud-1253-9431/2631/1 "2026-07-01T18:53:42Z")

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This message covers changes in this release.

- [critical release notices](https://docs.datomic.com/releases-cloud.html#critical-notices)
- [all release notes](https://docs.datomic.com/changes/cloud.html)

## 2026/07/01 - 1253-9431

- Feature: Permanently discontinue maintenance of a composite tuple attribute. Run upgrade-schema to get access. See [Discontinuing Composite Tuples](https://docs.datomic.com/schema/schema-reference.html#discontinuing-composite-tuples) for more details.
- Feature: [seek-datoms](https://docs.datomic.com/indexes/rseek-datoms.html) - index access to raw datoms.
- Feature: [rseek-datoms](https://docs.datomic.com/indexes/rseek-datoms.html) - reverse complement of seek-datoms.
- Feature: IMDSv2 is now supported. Requires ions to first be deployed using ion-dev 1.0.356 or later. Set ImdsHttpToken parameter to required on CloudFormation Compute Group templates to enforce IMDSv2 only.
- Upgrade: Jetty server from 9 (EOL) to Jetty 12.1 and Jakarta EE 6.1.
- Performance: improved index read performance.
- Fix: prevent blanks `_` from unifying across function clauses in query.

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<div class="post-metadata">

**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [July 8, 2026, 3:00pm UTC](https://forum.datomic.com/t/datomic-cloud-1253-9431/2631/2 "2026-07-08T15:00:16Z")

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An issue was discovered and reported by a Datomic Cloud user who used `aws-api` in their ions application. This release creates a conflict with users using any older version of `aws-api` than `0.8.686`. We are currently working on a release of Cloud that will address this issue and ensure that we do not conflict with user’s choices around `aws-api`.

If you have already upgraded to this version and use `aws-api` you can safely downgrade to the [previous cloud release 1217-9399](https://docs.datomic.com/changes/cloud.html#1217-9399) as long as you have not created a new DB on the new version or run the `upgrade-schema` on an existing DB. If you have any questions please contact support [via ticket](https://support.cognitect.com/hc/en-us/requests/new) or e-mail: ([support@cognitect.com](mailto:support@cognitect.com)).

I will update this thread to point to the next cloud release when it’s ready.