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  • stormiS

    XCP-ng 8.3 updates announcements and testing

    Pinned News
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    734 Posts
    867k Views
    acebmxerA
    I have been doing more testing and if it is not known yet I belive this issue happens when the VDIs are in QCOW2 format. When using VHD I have no issues with backup jobs runing and completing when using NBD and CBT while the jobs hang previously when backing up a QCOW2 vdi. 2026-10-24T22_35_02.931Z - backup NG.txt
  • TeddyAstieT

    Enabling Intel APICv for better performance

    Development
    2
    3 Votes
    2 Posts
    222 Views
    T
    Sharing some results. I enabled this on my homelab server, a Dell R630 with Intel Xeon E5-2630 v4 (Broadwell). No adverse impact noticed. The CDM results on Windows is higher than previous runs however, I do not go in depth with I/O benchmarking. (I am using the latest win-pv-drivers on Windows and the rust-based guest tools on Linux) Controller is in HBA mode. VM SR is using SMAPIv3 (ZFS, RAID-0, noop scheduler) [image: R630_XCP-ng_APICv.png] CDM results. Windows Server 2019 4 vCPU/8GB RAM/single VHD: [image: 2610_WIN2019_ZFS.png] I installed ScyllaDB on Alma Linux 10.2 (4 vCPU/8GB RAM & two VHDs, ScyllaDB uses a dedicated drive for data) with io_uring enabled and noop scheduler set on VM. Here are the IOTune results from the ScyllaDB installation: Measuring sequential write bandwidth: 826 MiB/s (deviation 13%) Measuring sequential read bandwidth: 1061 MiB/s (deviation 6%) Measuring random write IOPS: 50791 IOPS (deviation 11%) Measuring random read IOPS: 62977 IOPS (deviation 16%)