# Latest **URL:** https://dragonfly.discourse.group/latest.md [Latest](https://dragonfly.discourse.group/latest.md) · [Categories](https://dragonfly.discourse.group/categories.md) · [Tags](https://dragonfly.discourse.group/tags.md) --- ## [Welcome to Dragonfly! 👋](https://dragonfly.discourse.group/t/welcome-to-dragonfly/5)
**Author:** [@system](https://dragonfly.discourse.group/u/system)\ **Replies:** 0\ **Last updated:** [May 17, 2024, 5:35pm UTC](https://dragonfly.discourse.group/t/welcome-to-dragonfly/5 "2024-05-17T17:35:24Z")
We are so glad you joined us. Dragonfly If you need help, please search before you post. We’re happy to have you here! Here are some things you can do to get started: :speaking\_head: Introduce yourself by adding you… --- ## [Kubernetes instance backups using Dragonfly Operator](https://dragonfly.discourse.group/t/kubernetes-instance-backups-using-dragonfly-operator/349)
**Author:** [@peins94](https://dragonfly.discourse.group/u/peins94)\ **Replies:** 1\ **Last updated:** [May 29, 2026, 5:12am UTC](https://dragonfly.discourse.group/t/kubernetes-instance-backups-using-dragonfly-operator/349 "2026-05-29T05:12:05Z")
How are you handling snapshots + backups? I currently have snapshots to PVC enabled with cron of every 5 minutes or so, which ensures persistence, however I would also like to do a daily backups to S3 or something. If I … --- ## [Help segmenting](https://dragonfly.discourse.group/t/help-segmenting/339)
**Author:** [@sharkjess](https://dragonfly.discourse.group/u/sharkjess)\ **Replies:** 1\ **Last updated:** [May 23, 2026, 10:57am UTC](https://dragonfly.discourse.group/t/help-segmenting/339 "2026-05-23T10:57:37Z")
I have this CT scan of a stack of mussles. I would like to separate these mussles to individual slides so mussle 1 on one slide, mussle 2 one one slide etc. without loosing any data since I want to analyse the mussle for… --- ## [Tetrameshing for Abaqus](https://dragonfly.discourse.group/t/tetrameshing-for-abaqus/348)
**Author:** [@sophpol](https://dragonfly.discourse.group/u/sophpol)\ **Replies:** 0\ **Last updated:** [May 23, 2026, 10:50am UTC](https://dragonfly.discourse.group/t/tetrameshing-for-abaqus/348 "2026-05-23T10:50:06Z")
Hi :slight\_smile: I’m trying to generate a tetra grid for FEA in Abaqus. I’ve found some info online on how to generate this from an ROI, but to my knowledge the mesh cannot be exported as an abaqis.inp file. has anyon… --- ## [Json.get with jsonpath filter expression ?() ERR syntax error](https://dragonfly.discourse.group/t/json-get-with-jsonpath-filter-expression-err-syntax-error/347)
**Author:** [@LuisRibeiro](https://dragonfly.discourse.group/u/LuisRibeiro)\ **Replies:** 0\ **Last updated:** [May 14, 2026, 2:54pm UTC](https://dragonfly.discourse.group/t/json-get-with-jsonpath-filter-expression-err-syntax-error/347 "2026-05-14T14:54:58Z")
I’m new to dragonfly (and redis too). I use dragonfly on windows 11 and docker. On docker, i compare dragonfly latest and redis 8.6. I use a windows client version 6 to acces this containers. The jsonPath filter ?() se… --- ## [Cluster management for multi-node](https://dragonfly.discourse.group/t/cluster-management-for-multi-node/341)
**Author:** [@khubikumar](https://dragonfly.discourse.group/u/khubikumar)\ **Replies:** 1\ **Last updated:** [April 15, 2026, 4:36pm UTC](https://dragonfly.discourse.group/t/cluster-management-for-multi-node/341 "2026-04-15T16:36:36Z")
Hi everyone, I’m evaluating DragonflyDB for a feature store use case at scale. I’m trying to understand how cluster management is supposed to work with the Dragonfly operator, From what I understand of Dragonfly’s clus… --- ## [Error training model training model(s) – Pre-trained 2.5D (3 slices) U-Net Depth 5](https://dragonfly.discourse.group/t/error-training-model-training-model-s-pre-trained-2-5d-3-slices-u-net-depth-5/335)
**Author:** [@Valdenilson](https://dragonfly.discourse.group/u/Valdenilson)\ **Replies:** 0\ **Last updated:** [February 24, 2026, 1:58pm UTC](https://dragonfly.discourse.group/t/error-training-model-training-model-s-pre-trained-2-5d-3-slices-u-net-depth-5/335 "2026-02-24T13:58:39Z")
We are currently performing training for particulate organic matter (POM) segmentation using the Segmentation Wizard. Specifically, we are using the Model Generation Strategy Pre-trained 2.5D (3 slices) U-Net Depth 5. Ho… --- ## [Unusual snapshot behaviour](https://dragonfly.discourse.group/t/unusual-snapshot-behaviour/332)
**Author:** [@adochan](https://dragonfly.discourse.group/u/adochan)\ **Replies:** 3\ **Last updated:** [February 17, 2026, 3:15pm UTC](https://dragonfly.discourse.group/t/unusual-snapshot-behaviour/332 "2026-02-17T15:15:21Z")
Hi there, We are currently deploying multiple dragonfly clusters which are configured to snapshot to S3. We are seeing a very odd problem with one of those clusters. We have created a bucket - let’s call it df-snapshot… --- ## [RedisSemanticCache with LangChain not working after migrating from Redis to Dragonfly](https://dragonfly.discourse.group/t/redissemanticcache-with-langchain-not-working-after-migrating-from-redis-to-dragonfly/330)
**Author:** [@blancamartnez01](https://dragonfly.discourse.group/u/blancamartnez01)\ **Replies:** 1\ **Last updated:** [February 3, 2026, 9:38am UTC](https://dragonfly.discourse.group/t/redissemanticcache-with-langchain-not-working-after-migrating-from-redis-to-dragonfly/330 "2026-02-03T09:38:49Z")
Hi everyone, I’m running into an issue after migrating from Redis to Dragonfly and was wondering if anyone has experienced something similar. I previously had a system working correctly using Redis together with LangC… --- ## [Jedis jsonSet Large data storage exception](https://dragonfly.discourse.group/t/jedis-jsonset-large-data-storage-exception/320)
**Author:** [@shaoguangchao](https://dragonfly.discourse.group/u/shaoguangchao)\ **Replies:** 2\ **Last updated:** [December 5, 2025, 7:07pm UTC](https://dragonfly.discourse.group/t/jedis-jsonset-large-data-storage-exception/320 "2025-12-05T19:07:46Z")
redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out at redis.clients.jedis.util.RedisInputStream.ensureFill(RedisInputStream.java:262) at redis.clients.jedis.util.Re… --- ## [Affinity not applied](https://dragonfly.discourse.group/t/affinity-not-applied/324)
**Author:** [@josemrs](https://dragonfly.discourse.group/u/josemrs)\ **Replies:** 2\ **Last updated:** [December 5, 2025, 7:05pm UTC](https://dragonfly.discourse.group/t/affinity-not-applied/324 "2025-12-05T19:05:24Z")
Hi, We got fed up with Redis not behaving well and constantly crashing, even though it was expected to be highly available. So, we moved to Dragonfly, and we’ve been quite happy since then. However, we noticed an odd b… --- ## [Table\_used\_memory metric information](https://dragonfly.discourse.group/t/table-used-memory-metric-information/325)
**Author:** [@nunodio](https://dragonfly.discourse.group/u/nunodio)\ **Replies:** 2\ **Last updated:** [December 2, 2025, 5:50pm UTC](https://dragonfly.discourse.group/t/table-used-memory-metric-information/325 "2025-12-02T17:50:33Z")
Hello everyone, I’m running a Dragonfly setup on Kubernetes with a Master/Replica configuration. I’ve noticed a significant discrepancy in the memory usage between the two instances. Specifically, the table\_used\_memory … --- ## [DragonFly RAM Entries and SSD Entries](https://dragonfly.discourse.group/t/dragonfly-ram-entries-and-ssd-entries/316)
**Author:** [@thangaprakash](https://dragonfly.discourse.group/u/thangaprakash)\ **Replies:** 1\ **Last updated:** [November 18, 2025, 7:47am UTC](https://dragonfly.discourse.group/t/dragonfly-ram-entries-and-ssd-entries/316 "2025-11-18T07:47:11Z")
3 VMs – Each VM 8 vCPU, 32 GB, SSD Storage 250GB OS - 6.1.148-173.267.amzn2023.aarch64 DragonFly version : 1.34.2 MaxMemory : 20GB SSD Storage: 200GB 1 Master and 2 Replicas with 3 Sentinels Sentinel version : 7.2… --- ## [M\_replace\_aux Error with DragonFly 1.34.2](https://dragonfly.discourse.group/t/m-replace-aux-error-with-dragonfly-1-34-2/317)
**Author:** [@thangaprakash](https://dragonfly.discourse.group/u/thangaprakash)\ **Replies:** 2\ **Last updated:** [October 29, 2025, 7:32pm UTC](https://dragonfly.discourse.group/t/m-replace-aux-error-with-dragonfly-1-34-2/317 "2025-10-29T19:32:46Z")
ct 27 19:54:58 ip-172-31-0-22 dragonfly\[78125\]: F20251027 19:54:57.888782 78133 init.cc:140\] Uncaught exception: basic\_string::\_ M\_replace\_aux Oct 27 19:55:00 ip-172-31-0-22 dragonfly\[78125\]: \*\*\* Check failure stack tr… --- ## [Flags Configurations Details were getting lost - 1.34.2](https://dragonfly.discourse.group/t/flags-configurations-details-were-getting-lost-1-34-2/319)
**Author:** [@thangaprakash](https://dragonfly.discourse.group/u/thangaprakash)\ **Replies:** 2\ **Last updated:** [October 29, 2025, 7:28pm UTC](https://dragonfly.discourse.group/t/flags-configurations-details-were-getting-lost-1-34-2/319 "2025-10-29T19:28:36Z")
When I set maxmemory using redis-cli with Config set maxmemory 25GB, I observed the current booted configurations were overwritten with single configuration. DragonFly version 1.34.2 /etc/dragonfly/dragonfly.flags.conf… --- ## [DragonFly Config File Support in v1.34.2 - Equivalent to Redis](https://dragonfly.discourse.group/t/dragonfly-config-file-support-in-v1-34-2-equivalent-to-redis/314)
**Author:** [@thangaprakash](https://dragonfly.discourse.group/u/thangaprakash)\ **Replies:** 2\ **Last updated:** [October 27, 2025, 8:04pm UTC](https://dragonfly.discourse.group/t/dragonfly-config-file-support-in-v1-34-2-equivalent-to-redis/314 "2025-10-27T20:04:43Z")
Starting journey with DragonFly version 1.34.2 … I am unable to provide dragonfly.conf (as that of redis) while starting the dragonfly service. (linux) I am able to provide “-–flagfile flags.conf” but it doesn’t suppor… --- ## [Is it possible to change maxmemory\_policy?](https://dragonfly.discourse.group/t/is-it-possible-to-change-maxmemory-policy/313)
**Author:** [@KleinenberG](https://dragonfly.discourse.group/u/KleinenberG)\ **Replies:** 2\ **Last updated:** [September 4, 2025, 6:52am UTC](https://dragonfly.discourse.group/t/is-it-possible-to-change-maxmemory-policy/313 "2025-09-04T06:52:20Z")
Hello! I see in the output INFO MEMORY: maxmemory\_policy:noeviction can i change this policy? 127.0.0.1:6379\> info server redis\_version:7.4.0 dragonfly\_version:df-v1.28.1 as far as I understand - no!? --- ## [Arguements are getting passed but not overriding](https://dragonfly.discourse.group/t/arguements-are-getting-passed-but-not-overriding/312)
**Author:** [@Ben](https://dragonfly.discourse.group/u/Ben)\ **Replies:** 3\ **Last updated:** [August 29, 2025, 3:15pm UTC](https://dragonfly.discourse.group/t/arguements-are-getting-passed-but-not-overriding/312 "2025-08-29T15:15:54Z")
Hello, I have installed the Dragonfly operator in my cluster (via Helm) chart v1.33.1. I have been testing how I can pass configuration arguments using a manifest. For example: apiVersion: dragonflydb.io/v1alpha1 kind… --- ## [DragonflyDB Active-Active (Multi-Master) Support in 2025?](https://dragonfly.discourse.group/t/dragonflydb-active-active-multi-master-support-in-2025/304)
**Author:** [@BelroDe](https://dragonfly.discourse.group/u/BelroDe)\ **Replies:** 4\ **Last updated:** [August 19, 2025, 10:27pm UTC](https://dragonfly.discourse.group/t/dragonflydb-active-active-multi-master-support-in-2025/304 "2025-08-19T22:27:06Z")
Hi everyone, I’m trying to clarify the current state of active-active / multi-master support in DragonflyDB as of 2025. Information online seems a bit confusing, especially with the introduction of DragonflyDB Swarm. S… --- ## [ASYNC flushes possible?](https://dragonfly.discourse.group/t/async-flushes-possible/297)
**Author:** [@bergfreund](https://dragonfly.discourse.group/u/bergfreund)\ **Replies:** 4\ **Last updated:** [August 11, 2025, 3:23pm UTC](https://dragonfly.discourse.group/t/async-flushes-possible/297 "2025-08-11T15:23:33Z")
We have previously emptied our databases in Redis using “flushDB ASYNC”. Dragonfly does not accept parameters for flushDB. However, “flushALL ASYNC” is accepted. The documentation does not mention this, however. So my … --- ## [Unable to restore from .dfs unless --force\_epoll=true](https://dragonfly.discourse.group/t/unable-to-restore-from-dfs-unless-force-epoll-true/295)
**Author:** [@hgorni](https://dragonfly.discourse.group/u/hgorni)\ **Replies:** 1\ **Last updated:** [July 17, 2025, 6:44pm UTC](https://dragonfly.discourse.group/t/unable-to-restore-from-dfs-unless-force-epoll-true/295 "2025-07-17T18:44:09Z")
My Dragonfly instance is configured with --cache\_mode and --maxmemory=160G , running on a GCP Compute Engine VM with 22 vCPUs and 176 GB of RAM (c3-highmem-22 , Intel Sapphire Rapids, x86\_64, Debian 6.1.140-1). I’ve not… --- ## [Memory usage keeps increasing after reaching --maxmemory limit](https://dragonfly.discourse.group/t/memory-usage-keeps-increasing-after-reaching-maxmemory-limit/294)
**Author:** [@hgorni](https://dragonfly.discourse.group/u/hgorni)\ **Replies:** 1\ **Last updated:** [July 17, 2025, 2:29pm UTC](https://dragonfly.discourse.group/t/memory-usage-keeps-increasing-after-reaching-maxmemory-limit/294 "2025-07-17T14:29:09Z")
I recently migrated from Redis to Dragonfly in my production environment, setting an instance with --cache\_mode and --maxmemory=160G . Everything works as expected at first, but as the memory usage approaches the limit, … --- ## [Are snapshots working using Docker compose?](https://dragonfly.discourse.group/t/are-snapshots-working-using-docker-compose/290)
**Author:** [@windmeup](https://dragonfly.discourse.group/u/windmeup)\ **Replies:** 5\ **Last updated:** [June 26, 2025, 7:34pm UTC](https://dragonfly.discourse.group/t/are-snapshots-working-using-docker-compose/290 "2025-06-26T19:34:50Z")
I’ve been running Dragonflydb on a single node using Docker compose for about 8 months now. I am using the following docker compose yaml to attempt to take snapshots every 5 minutes: # This version persists data. servi… --- ## [Operator version compatibility with DragonflyDB](https://dragonfly.discourse.group/t/operator-version-compatibility-with-dragonflydb/288)
**Author:** [@larntz](https://dragonfly.discourse.group/u/larntz)\ **Replies:** 2\ **Last updated:** [June 24, 2025, 11:00am UTC](https://dragonfly.discourse.group/t/operator-version-compatibility-with-dragonflydb/288 "2025-06-24T11:00:35Z")
Hello, I would like to understand how to know which DragonflyDB versions are compatible with specific operator versions. I do not see a version compatibility matrix in the readme or other documentation I’ve read. What’… --- ## [What are on Demand Units per month ? (GCP marketplace)](https://dragonfly.discourse.group/t/what-are-on-demand-units-per-month-gcp-marketplace/285)
**Author:** [@Simon1](https://dragonfly.discourse.group/u/Simon1)\ **Replies:** 2\ **Last updated:** [June 5, 2025, 6:17pm UTC](https://dragonfly.discourse.group/t/what-are-on-demand-units-per-month-gcp-marketplace/285 "2025-06-05T18:17:36Z")
When adding Dragonfly via GCP Marketplace, this looks to be an on demand usage subscription, with a price of xx per ‘Units per month’. I tried to find what is meant by these ‘On Demand Dragonfly Cloud Usage units/month’… --- ## [Changing the default port using the Kubernetes Operator](https://dragonfly.discourse.group/t/changing-the-default-port-using-the-kubernetes-operator/278)
**Author:** [@mkizer](https://dragonfly.discourse.group/u/mkizer)\ **Replies:** 6\ **Last updated:** [June 3, 2025, 3:47pm UTC](https://dragonfly.discourse.group/t/changing-the-default-port-using-the-kubernetes-operator/278 "2025-06-03T15:47:46Z")
What is the correct method for specifying the default Dragonfly port when installing via the Kubernetes Operator? I tried adding an arg to the spec as seen here: apiVersion: dragonflydb.io/v1alpha1 kind: Dragonfly meta… --- ## [Strange behavior with ZRANGEBYSCORE](https://dragonfly.discourse.group/t/strange-behavior-with-zrangebyscore/247)
**Author:** [@Claire](https://dragonfly.discourse.group/u/Claire)\ **Replies:** 19\ **Last updated:** [February 9, 2025, 11:43am UTC](https://dragonfly.discourse.group/t/strange-behavior-with-zrangebyscore/247 "2025-02-09T11:43:41Z")
Hi! We have recently migrated from Redis to DragonflyDB, and we are experiencing some weird behavior with ZRANGEBYSCORE. Indeed, for one of our functionalities, we have sorted sets holding numeric identifiers that are … --- ## [Enabling Data Persistence](https://dragonfly.discourse.group/t/enabling-data-persistence/240)
**Author:** [@thedukedk](https://dragonfly.discourse.group/u/thedukedk)\ **Replies:** 7\ **Last updated:** [February 4, 2025, 9:18am UTC](https://dragonfly.discourse.group/t/enabling-data-persistence/240 "2025-02-04T09:18:00Z")
Hi folks, What is the best way to enable data persistence when deploying a 3 replic setup of dragonfly onto a Kuberenetes cluster? Today we have deployed a dragonfly with the operator with the below resource. apiVersi… --- ## [Redis/Dragonfly stream does not deliver chunks, unreliable behaviour, or anything I am missing](https://dragonfly.discourse.group/t/redis-dragonfly-stream-does-not-deliver-chunks-unreliable-behaviour-or-anything-i-am-missing/243)
**Author:** [@aahnik](https://dragonfly.discourse.group/u/aahnik)\ **Replies:** 1\ **Last updated:** [February 4, 2025, 9:00am UTC](https://dragonfly.discourse.group/t/redis-dragonfly-stream-does-not-deliver-chunks-unreliable-behaviour-or-anything-i-am-missing/243 "2025-02-04T09:00:15Z")
Thank you so much! Context Basically, let me start with a bit of context. I have a python microservice, that streams message chunks (llm output), and a nestjs service that consumes those. The producer uses XADD, while … --- ## [Error message when loading session file](https://dragonfly.discourse.group/t/error-message-when-loading-session-file/250)
**Author:** [@Jenny](https://dragonfly.discourse.group/u/Jenny)\ **Replies:** 1\ **Last updated:** [February 4, 2025, 2:35am UTC](https://dragonfly.discourse.group/t/error-message-when-loading-session-file/250 "2025-02-04T02:35:24Z")
Every time I try to load the session file, I receive an error message stating that the session cannot be loaded. However, after clicking “Ok”, both Dragonfly and Wizard function normally despite the error. Why is this ha… [Next page](https://dragonfly.discourse.group/latest.md?page=1)