# Latest **URL:** https://forum.datomic.com/latest.md [Latest](https://forum.datomic.com/latest.md) · [Categories](https://forum.datomic.com/categories.md) --- ## [Ion-dev 1.0.356 \[Datomic Cloud\]](https://forum.datomic.com/t/ion-dev-1-0-356-datomic-cloud/2632)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 4\ **Last updated:** [July 21, 2026, 4:13pm UTC](https://forum.datomic.com/t/ion-dev-1-0-356-datomic-cloud/2632 "2026-07-21T16:13:16Z")
This message covers changes in this release. For more details, see Datomic Cloud Releases | Datomic 2026/07/01 - 1.0.356 - Ion-Dev Feature: IMDSv2 is now supported. Push a new revision using ion-dev 1.0.356 then :deplo… --- ## [Ion-dev 1.0.358 \[Datomic Cloud\]](https://forum.datomic.com/t/ion-dev-1-0-358-datomic-cloud/2638)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [July 21, 2026, 4:11pm UTC](https://forum.datomic.com/t/ion-dev-1-0-358-datomic-cloud/2638 "2026-07-21T16:11:38Z")
This message covers changes in this release. For more details, see Datomic Cloud Releases | Datomic 2026/07/21 - 1.0.358 - Ion-Dev Updated dep list for Datomic Cloud 1254-9433 --- ## [Datomic Cloud 1254-9433](https://forum.datomic.com/t/datomic-cloud-1254-9433/2637)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [July 21, 2026, 4:10pm UTC](https://forum.datomic.com/t/datomic-cloud-1254-9433/2637 "2026-07-21T16:10:10Z")
This message covers changes in this release. critical release notices all release notes 2026/07/21 - 1254-9433 Fix: The 1253-9431 release of Datomic Cloud included a broken version of com.cognitect.aws/api. Ion apps … --- ## [Datomic Local 1.0.300 now available](https://forum.datomic.com/t/datomic-local-1-0-300-now-available/2636)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 1\ **Last updated:** [July 15, 2026, 8:10pm UTC](https://forum.datomic.com/t/datomic-local-1-0-300-now-available/2636 "2026-07-15T20:10:04Z")
The complete change log can be found at Change Log | Datomic Local 2026/07/14 - 1.0.300 Feature: Datomic Local can now run upgrade-schema to install system schema introduced after database creation. Feature: Permanentl… --- ## [New client-pro 1.0.91 \[Datomic Pro\]](https://forum.datomic.com/t/new-client-pro-1-0-91-datomic-pro/2635)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [July 10, 2026, 6:43pm UTC](https://forum.datomic.com/t/new-client-pro-1-0-91-datomic-pro/2635 "2026-07-10T18:43:43Z")
This message covers changes in this release. For a summary of critical release notices, see Release Notices | Datomic . For a list of all on-prem changes see Change Log | Datomic 1.0.91: 2026/07/10 - Client-Pro Feature… --- ## [Datomic 1.0.7705 Pro now available](https://forum.datomic.com/t/datomic-1-0-7705-pro-now-available/2634)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [July 10, 2026, 6:38pm UTC](https://forum.datomic.com/t/datomic-1-0-7705-pro-now-available/2634 "2026-07-10T18:38:56Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic 1.0.7705: 2026/07/10 Feature: Permanently disconti… --- ## [Datomic Cloud 1253-9431](https://forum.datomic.com/t/datomic-cloud-1253-9431/2631)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 1\ **Last updated:** [July 8, 2026, 3:00pm UTC](https://forum.datomic.com/t/datomic-cloud-1253-9431/2631 "2026-07-08T15:00:16Z")
This message covers changes in this release. critical release notices all release notes 2026/07/01 - 1253-9431 Feature: Permanently discontinue maintenance of a composite tuple attribute. Run upgrade-schema to get ac… --- ## [Read-only peer api](https://forum.datomic.com/t/read-only-peer-api/422)
**Author:** [@abagla](https://forum.datomic.com/u/abagla)\ **Replies:** 4\ **Last updated:** [July 2, 2026, 9:43pm UTC](https://forum.datomic.com/t/read-only-peer-api/422 "2026-07-02T21:43:32Z")
Is there a way(through config, policies, etc) to make the peer library run in a read-only mode. We are using datomic-pro:0.9.5561.50. --- ## [New Client-Cloud 1.0.137](https://forum.datomic.com/t/new-client-cloud-1-0-137/2633)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [July 1, 2026, 6:56pm UTC](https://forum.datomic.com/t/new-client-cloud-1-0-137/2633 "2026-07-01T18:56:24Z")
This message covers changes in this release. For more details, see releases page for cloud 2026/07/01 1.0.137 - Client-Cloud Update Feature: seek-datoms - index access to raw datoms. Feature: rseek-datoms - reverse com… --- ## [Default value of \`:timeout\`](https://forum.datomic.com/t/default-value-of-timeout/2630)
**Author:** [@onetom](https://forum.datomic.com/u/onetom)\ **Replies:** 0\ **Last updated:** [July 1, 2026, 8:14am UTC](https://forum.datomic.com/t/default-value-of-timeout/2630 "2026-07-01T08:14:48Z")
datomic.client.api documentation NS doc string mentions a common :timeout key, but doesn’t state its default value or values for the functions using it. We are still experiencing Loading database errors, so I was wonder… --- ## [\`d/client\` does network access](https://forum.datomic.com/t/d-client-does-network-access/2376)
**Author:** [@onetom](https://forum.datomic.com/u/onetom)\ **Replies:** 2\ **Last updated:** [July 1, 2026, 7:41am UTC](https://forum.datomic.com/t/d-client-does-network-access/2376 "2026-07-01T07:41:29Z")
According to datomic.client.api documentation : This function does not communicate with a server and returns immediately. However, I do get exceptions quite often lately on d/client calls, which are delayed by a few … --- ## [Ion push trying to read non-existent maven artifact](https://forum.datomic.com/t/ion-push-trying-to-read-non-existent-maven-artifact/2627)
**Author:** [@wevrem](https://forum.datomic.com/u/wevrem)\ **Replies:** 6\ **Last updated:** [May 20, 2026, 10:29pm UTC](https://forum.datomic.com/t/ion-push-trying-to-read-non-existent-maven-artifact/2627 "2026-05-20T22:29:20Z")
Attempting to push an ion and I get an error about not finding artifact ion-1.0.47.jar. I found a similar issue with @charliekilo having trouble with version 0.9.7. I tried the steps that @jaret suggested, and I can succ… --- ## [Release Notice \[Datomic Pro\]: After May 30th 2026, releases of Datomic Pro will require running on Java 17 or later](https://forum.datomic.com/t/release-notice-datomic-pro-after-may-30th-2026-releases-of-datomic-pro-will-require-running-on-java-17-or-later/2624)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [May 13, 2026, 12:41pm UTC](https://forum.datomic.com/t/release-notice-datomic-pro-after-may-30th-2026-releases-of-datomic-pro-will-require-running-on-java-17-or-later/2624 "2026-05-13T12:41:37Z")
Datomic releases after May 30th, 2026 will no longer support running on Java 11. What does this mean for you? If you are using Java 11 you should plan to upgrade to one of the LTS versions of Java that are supported by … --- ## [Datomic 1.0.7622 Pro now available](https://forum.datomic.com/t/datomic-1-0-7622-pro-now-available/2620)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [April 28, 2026, 3:47pm UTC](https://forum.datomic.com/t/datomic-1-0-7622-pro-now-available/2620 "2026-04-28T15:47:20Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic 1.0.7622: 2026/04/28 Feature: Read-only connection… --- ## [Datomic 1.0.7556 Pro now available](https://forum.datomic.com/t/datomic-1-0-7556-pro-now-available/2615)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 2\ **Last updated:** [April 10, 2026, 1:58pm UTC](https://forum.datomic.com/t/datomic-1-0-7556-pro-now-available/2615 "2026-04-10T13:58:15Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic 1.0.7556: 2026/03/13 Fix: Prevent issue when runni… --- ## [Is sync() without t guaranteed to see a transaction committed by another peer?](https://forum.datomic.com/t/is-sync-without-t-guaranteed-to-see-a-transaction-committed-by-another-peer/2616)
**Author:** [@nikolayandr](https://forum.datomic.com/u/nikolayandr)\ **Replies:** 1\ **Last updated:** [March 31, 2026, 3:32pm UTC](https://forum.datomic.com/t/is-sync-without-t-guaranteed-to-see-a-transaction-committed-by-another-peer/2616 "2026-03-31T15:32:47Z")
Hi Datomic team, We’re trying to understand the exact guarantees of (d/sync conn) (without a t argument), as described in Datomic - Sync. Our infrastructure workflow: Peer A writes data via a synchronous transaction … --- ## [Does excision count towards the 1 billion datom limit?](https://forum.datomic.com/t/does-excision-count-towards-the-1-billion-datom-limit/1132)
**Author:** [@bhurlow](https://forum.datomic.com/u/bhurlow)\ **Replies:** 5\ **Last updated:** [March 27, 2026, 6:00pm UTC](https://forum.datomic.com/t/does-excision-count-towards-the-1-billion-datom-limit/1132 "2026-03-27T18:00:08Z")
My team has found some use cases with Datomic where we’d like to store temporary data and delete it at some later point. For example: deleted old user sessions, queuing jobs for a worker process etc. I know that retract… --- ## [Ion-dev 1.0.352 \[Datomic Cloud\]](https://forum.datomic.com/t/ion-dev-1-0-352-datomic-cloud/2612)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 3\ **Last updated:** [February 23, 2026, 12:50pm UTC](https://forum.datomic.com/t/ion-dev-1-0-352-datomic-cloud/2612 "2026-02-23T12:50:04Z")
This message covers changes in this release. For more details, see Datomic Cloud Releases | Datomic 2026/02/17 - 1.0.352 - Ion-Dev Upgrade: org.clojure/tools.deps.alpha to org.clojure/tools.deps 0.24.1523 Updated dep l… --- ## [Datomic Cloud 1217-9399](https://forum.datomic.com/t/datomic-cloud-1217-9399/2611)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 1\ **Last updated:** [February 17, 2026, 4:41pm UTC](https://forum.datomic.com/t/datomic-cloud-1217-9399/2611 "2026-02-17T16:41:07Z")
This message covers changes in this release. critical release notices all release notes 2026/02/17 - 1217-9399 Performance: Improve indexing performance, reduce I/O in large databases Fix: Indexing slowly leaks garba… --- ## [Datomic 1.0.7491 Pro now Available](https://forum.datomic.com/t/datomic-1-0-7491-pro-now-available/2608)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [January 26, 2026, 4:06pm UTC](https://forum.datomic.com/t/datomic-1-0-7491-pro-now-available/2608 "2026-01-26T16:06:38Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic . For a summary of critical release notices, see Re… --- ## [Datomic 1.0.7482 Pro now Available](https://forum.datomic.com/t/datomic-1-0-7482-pro-now-available/2604)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [January 6, 2026, 3:37pm UTC](https://forum.datomic.com/t/datomic-1-0-7482-pro-now-available/2604 "2026-01-06T15:37:56Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic . For a summary of critical release notices, see Re… --- ## [Broken documentation search](https://forum.datomic.com/t/broken-documentation-search/2602)
**Author:** [@onetom](https://forum.datomic.com/u/onetom)\ **Replies:** 2\ **Last updated:** [December 8, 2025, 2:08pm UTC](https://forum.datomic.com/t/broken-documentation-search/2602 "2025-12-08T14:08:13Z")
I’m getting this JavaScript error: search.js:13 Error fetching JSON: Error: HTTP error! status: 404 at fetchAndParseJSON (search.js:5:13) on Introduction | Datomic pages. It seems it’s caused by the search index J… --- ## [Does query result order of entity IDs affect cache and segment read efficiency?](https://forum.datomic.com/t/does-query-result-order-of-entity-ids-affect-cache-and-segment-read-efficiency/2601)
**Author:** [@nikolayandr](https://forum.datomic.com/u/nikolayandr)\ **Replies:** 0\ **Last updated:** [November 7, 2025, 9:58am UTC](https://forum.datomic.com/t/does-query-result-order-of-entity-ids-affect-cache-and-segment-read-efficiency/2601 "2025-11-07T09:58:00Z")
Hi Datomic team, When a query returns a large set of entity IDs, I’ve noticed that the IDs are often numerically close to each other, but sometimes there are large gaps. This made me wonder whether the order of entity … --- ## [Critical Release Datomic 1.0.7469 Pro now Available](https://forum.datomic.com/t/critical-release-datomic-1-0-7469-pro-now-available/2598)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 1\ **Last updated:** [October 24, 2025, 5:48pm UTC](https://forum.datomic.com/t/critical-release-datomic-1-0-7469-pro-now-available/2598 "2025-10-24T17:48:09Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic . For a summary of critical release notices, see Re… --- ## [Does Datomic provide any performance search query benefits when using comparison operators](https://forum.datomic.com/t/does-datomic-provide-any-performance-search-query-benefits-when-using-comparison-operators/2591)
**Author:** [@nikolayandr](https://forum.datomic.com/u/nikolayandr)\ **Replies:** 7\ **Last updated:** [October 20, 2025, 2:47pm UTC](https://forum.datomic.com/t/does-datomic-provide-any-performance-search-query-benefits-when-using-comparison-operators/2591 "2025-10-20T14:47:05Z")
Does Datomic provide any performance search query benefits when using comparison operators such as \<, \>, \<=, or \>= on indexed attributes, for example, numbers, strings, or dates? Or are indexes optimized only for equali… --- ## [How are people handling disaster recovery?](https://forum.datomic.com/t/how-are-people-handling-disaster-recovery/1984)
**Author:** [@DanM](https://forum.datomic.com/u/DanM)\ **Replies:** 3\ **Last updated:** [October 20, 2025, 9:06am UTC](https://forum.datomic.com/t/how-are-people-handling-disaster-recovery/1984 "2025-10-20T09:06:16Z")
I was looking at ways to back up Datomic Cloud, and found Cloud backups & recovery - #13 by lukenelson, which is various people asking for it and the reponse being “It uses S3 and DynamoDB, both of which have very high d… --- ## [Enrich Java API to allow requesting :query-stats by Peer.query](https://forum.datomic.com/t/enrich-java-api-to-allow-requesting-query-stats-by-peer-query/2381)
**Author:** [@nikolayandr](https://forum.datomic.com/u/nikolayandr)\ **Replies:** 3\ **Last updated:** [September 19, 2025, 5:41pm UTC](https://forum.datomic.com/t/enrich-java-api-to-allow-requesting-query-stats-by-peer-query/2381 "2025-09-19T17:41:05Z")
Hi @jaret , datomic.QueryRequest from jar com.datomic:peer:1.0.7025 does not provide a way to request query-stats. Is it planned to add such feature in the next releases? P.S. Additionally I noticed no information on da… --- ## [Not possible to pass more then one vector variable to or-join](https://forum.datomic.com/t/not-possible-to-pass-more-then-one-vector-variable-to-or-join/1591)
**Author:** [@nikolayandr](https://forum.datomic.com/u/nikolayandr)\ **Replies:** 13\ **Last updated:** [September 1, 2025, 1:31pm UTC](https://forum.datomic.com/t/not-possible-to-pass-more-then-one-vector-variable-to-or-join/1591 "2025-09-01T13:31:09Z")
The example schema: (def schema \[ { :db/ident :type :db/valueType :db.type/string :db/cardinality :db.cardinality/one } { :db/ident :typeCode :db… --- ## [Datomic Cloud 1172-9392](https://forum.datomic.com/t/datomic-cloud-1172-9392/2583)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 2\ **Last updated:** [August 15, 2025, 2:25pm UTC](https://forum.datomic.com/t/datomic-cloud-1172-9392/2583 "2025-08-15T14:25:05Z")
This message covers changes in this release. critical release notices all release notes 2025/08/12 - 1172-9392 Fix: Prevent a problem where in rare situations indexing jobs can fail to progress indefinitely. --- ## [Datomic 1.0.7394 Pro now available](https://forum.datomic.com/t/datomic-1-0-7394-pro-now-available/2580)
**Author:** [@jaret](https://forum.datomic.com/u/jaret)\ **Replies:** 0\ **Last updated:** [August 7, 2025, 5:34pm UTC](https://forum.datomic.com/t/datomic-1-0-7394-pro-now-available/2580 "2025-08-07T17:34:56Z")
This message covers changes in this release. The complete change log can be found at Change Log | Datomic . To download this release see Datomic Pro Releases | Datomic . For a summary of critical release notices, see Re… [Next page](https://forum.datomic.com/latest.md?page=1)