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| 5542d5 | MB Tech | 2025-08-07 19:08:42 | 1 | ### Proxmox VE 9.0: A Leap Forward in Virtualization |
| 2 | #### Proxmox VE 9.0 Overview |
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| c3dcc0 | mvbingham | 2025-08-07 15:06:16 | 3 | Proxmox Virtual Environment (VE) 9.0, released on August 5, 2025, marks a significant advancement for the open-source server management platform. This major update, celebrating Proxmox's 20th year of innovation, brings **enhanced storage, networking, and high availability capabilities**, all built upon a modernized core of **Debian 13 "Trixie"**. It aims to address critical enterprise demands by providing a more robust, scalable, and flexible virtualization solution. |
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| 5 | "Proxmox Virtual Environment (VE) 9.0 introduces advancements in both storage and networking capabilities, addressing critical enterprise demands". |
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| 7 | #### Key Themes and Most Important Ideas/Facts |
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| 8 | ##### 1. Modernized Core and Updated Components |
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| 9 | Proxmox VE 9.0 is fundamentally stronger due to its updated foundation and integrated technologies: |
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| 10 | * **Debian 13 "Trixie" Core**: The platform is now based on the latest Debian release, Debian 13 "Trixie". This provides "**newer packages, improved hardware support, and enhanced security**" and "security hardening, and broader device support". |
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| 11 | * **Linux Kernel 6.14.8-2**: A newer Linux kernel is the "**stable default enhancing hardware compatibility and performance**". |
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| 12 | * **Updated Open-Source Technologies**: Key virtualization and storage components have been bumped to their latest versions, including: |
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| 13 | * QEMU 10.0.2 |
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| 14 | * LXC 6.0.4 |
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| 15 | * Ceph Squid 19.2.3 |
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| 16 | * ZFS 2.3.3, which now notably "**supports adding new devices to existing RAIDZ pools with minimal downtime**". |
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| 18 | ##### 2. Enhanced Storage Management: Snapshots for LVM Shared Storage |
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| 19 | A highly anticipated feature, Proxmox VE 9.0 now offers robust snapshot functionality: |
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| 20 | * **Thick-provisioned LVM Shared Storage**: **VMs utilizing thick-provisioned LVM shared storages**, such as those backed by iSCSI or FC-based SANs, **now benefit from snapshot functionality out of the box**. This was a "long-awaited support for snapshots on thick-provisioned LVM shared storage". |
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| 21 | * **Volume Chains Implementation**: Snapshots are implemented as "**volume chains**, where a volume based on a snapshot only records differences to its parent snapshot volume". |
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| 22 | * **Storage-Independent Solution**: This feature provides "**a storage-independent solution for snapshots**", closing a gap for "customers with traditional SAN infrastructure who have historically relied on clustered file systems". The same model extends to "Directory, NFS, and CIFS storages". |
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| 24 | ##### 3. Advanced Networking with SDN Fabrics |
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| 25 | The release significantly improves Software-Defined Networking (SDN) capabilities: |
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| 26 | * **SDN Fabrics Feature**: This new feature "**simplifies the configuration and management of complex routed networks**". |
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| 27 | * **Reliability and Redundancy**: Engineered for reliability, **SDN Fabrics facilitates multiple paths between nodes and automatic failover across Network Interface Cards (NICs)**. This enables "**robust two-layer spine-leaf architectures for improved network redundancy and performance**". |
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| 28 | * **Dynamic Routing Protocol Support**: The SDN stack now supports "**two different routing protocols, OpenFabric and OSPF**", simplifying the management of "dynamically routed networks which can for example be used as Ethernet VPN (EVPN) underlay or full-mesh networks for Ceph". |
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| 30 | ##### 4. Fine-Grained Control with HA Resource Affinity Rules |
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| 31 | High Availability (HA) clusters gain more precise control over resource placement: |
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| 32 | * **Optimal Performance and Resiliency**: **HA resource affinity rules enable fine-grained control and flexibility over resource placement in HA clusters**, ensuring optimal performance, enhanced resiliency, and minimized latency for critical workloads. |
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| 33 | * **Strategic Resource Distribution**: Administrators can "**precisely define how virtual machines and other HA resources are distributed across a cluster**". |
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| 34 | * **Co-location**: "**Interdependent HA resources**, such as an application server and its associated database, **can be kept together on the same physical node to minimize network latency**". |
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| 35 | * **Separation**: For maximum redundancy, **rules can ensure these instances are kept on different nodes**, increasing fault tolerance and ensuring resiliency even during HA failovers. |
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| 37 | ##### 5. Revamped Mobile Interface |
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| 38 | Usability on the go has been significantly improved: |
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| 39 | * **Modern Framework**: The Proxmox VE mobile interface has been "**thoroughly reworked**, using the new Proxmox widget toolkit powered by the Rust-based Yew framework". |
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| 40 | * **Enhanced Functionality**: The redesigned interface provides "**quick access to service overviews and includes essential management functions, including starting and stopping virtual guests and basic configuration**". This makes it "**far easier to manage VMs on the go from any mobile browser**". |
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| 42 | #### Availability and Upgrade Path |
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| 43 | Proxmox VE 9.0 is available for download as an ISO image for bare-metal installation, containing the complete feature set. For existing users, "**Seamless upgrade instructions from Proxmox VE 8 to 9 are available**", with an "extensively tested and detailed upgrade path". It can also be installed on top of Debian. |
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| 20e774 | MB Tech | 2025-08-07 19:07:27 | 45 | Proxmox VE remains "**free and open-source software, published under the GNU Affero General Public License, v3**", with commercial subscription-based support available for enterprise users. The platform boasts a "**huge worldwide user base with more than 1.6 million hosts**" and "**more than 225,000 community members in the support forum**". |