# MinIO RELEASE.2020-05-28T23-29-21Z — Release & Upgrade Intelligence
- **Product:** MinIO (https://min.io)
- **Version:** RELEASE.2020-05-28T23-29-21Z
- **Released:** May 29, 2020
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/minio/updates/RELEASE.2020-05-28T23-29-21Z/

## Executive Summary (TL;DR)
MinIO RELEASE.2020-05-28T23-29-21Z. Source highlight: **Breaking Change** related to changes in readiness check. So, rolling upgrade is not supported.

## Breaking Changes & Deprecations
- - **Breaking Change** related to changes in readiness check. So, rolling upgrade is not supported.

## New Features
- Add object tagging support in s3 gateway. See (#9124) for more details.
- Introduce simpler GetMultipartInfo call for performance. See (#9722) for more details.
- Introduce simpler GetMultipartInfo call for performance (#9722) (05/28/20) (Harshavardhana)
- add docs for caching drives with docker (#9712) (05/27/20) (poornas)
- add copyobject tagging replace directive for gateway (#9711) (05/26/20) (P R)
- Add Docker development workflow for browser (#9664) (05/25/20) (darkdragon-001)

## Improvements
- Cache some values between Read to improve S3 select performance. See (#9645) for more details.
- CI improvements. See (#9663, #9664) for more details. Thanks to darkdragon-001.
- Improvements in fetching data blocks and disk info. See (#9563, #9682) for more details.
- Improvements in handling errors related to disks. See (#9703, #9727) for more details.
- Web UI: Improve "..." menu (#9631) (05/25/20) (darkdragon-001)
- sql, csv: Cache some values between Read() calls to gain performance (#9645) (05/22/20) (Anis Elleuch)

## Bug Fixes
- Bucket policy related fixes in NAS Gateway. See (#9706) for more details.
- Improvements and fixes in lifecycle. See( #9667, #9612, #9725) for more details.
- Object lock related bug fixes. See (#9677, #9684) for more details.
- Fix object size accounting for encrypted/compressed objects. See (#9690) for more details.
- Fix cache metadata update for range GET. See (#9636, #9698) for more details.
- Fix copyObject behavior on expanded zones. See (#9729) for more details.