All Content tagged with Amazon OpenSearch Service
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**Background**
We are building a small internal autoscaler that increases the per-node EBS volume size automatically when storage usage gets high.
On 2026-05-11 a routine EBS volume size increase re...
N_AgarwalEXPERT
published 5 days ago1 votes76 views
This article provides a detailed, step-by-step guide for AWS customers who have very large indices (>1 TB) in their OpenSearch cluster and want to reduce shard size for better performance and stabilit...
Domain Name: imdelastic-staging
Change ID: 40104c79-01a1-4a06-81ef-0b3190ee4bdf
Modification Type: EBS volume type change from gp2 to gp3
Start Time: April 30th, 2026 at 17:45 Bangkok time (10:45 UTC)...
N_AgarwalEXPERT
published 8 days ago0 votes102 views
Amazon OpenSearch Service now supports OpenSearch 3.x, which introduces significant performance improvements through Apache Lucene 10, JVM 21, and enhanced vector search capabilities. Upgrading from 2...
We are facing an issue with our Amazon OpenSearch Service domain.
Details:
Domain Name: ghn-anon-elasticsearch
Region: Ireland (eu-west-1)
Update Trigger Time: Yesterday, 5th May - around 11:30 AM In...
We are observing inconsistent result counts for identical k-NN vector search queries in Amazon OpenSearch Service.
### Issue
The same k-NN query, executed against the same index with the same query v...
Case ID: ****************
I submitted a case for a billing dispute that has been "Unassigned" for 8 days with no response, and my bill is due. Urgently needs a resolution before too much more time pa...
Jeongho KimSUPPORT ENGINEER
published 21 days ago0 votes83 views
The Amazon EBS documentation states that volume size can only be increased, not decreased. This article explains whether the same constraint applies to Amazon OpenSearch Service domains, why the answe...
I have created the OpenSearch UI (Dashboards). While creating I haven't selected the **Single sign-on authentication** and Granted administrator's permission only for me. While Launching the Applicati...
N_AgarwalEXPERT
published a month ago0 votes134 views
This article provides clear guidance on how to choose the sharding strategy for an Amazon OpenSearch Service cluster with 3 data nodes. The purpose of this article is to explain, in simple and practic...
Jatinder SinghEXPERT
published a month ago2 votes84 views
A detailed performance analysis between Amazon OpenSearch's specialized OM2 and general-purpose M7g instances to help you optimize performance and cost.