Posts

• RE: Rolling pool update

  @john.c Note that a two-host pool running HA can run into the split-brain issue if one of the hosts fails; it's highly recommended to have at least three hosts in an HA pool (or look into HA-Lizard if running a pool with two hosts and HA).

  posted in Xen Orchestra

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  tjkreidl
  
• RE: XO RBAC Granularity?

  @coolsport00 Hi !

  RBAC/ACLv2 should be on XO6 UI before the end of the year

  posted in Management

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  AtaxyaNetwork
  
• RE: Slow SR Creation

  @irtaza9 What do you see if you run top or xtop, or "xe task-list" when you start the process?

  posted in Management

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  tjkreidl
  
• RE: Slow SR Creation

  @irtaza9
  Why iDRAC and XCP-ng Backups Are Slow (I hope this is helpful, assuming I understand your topology and configuration correctly):
  • iDRAC Virtual Media / HTML5 Limits: iDRAC virtual media or browser-based streaming sessions are heavily throttled by encryption overhead and are not designed for bulk high-speed data exports. Furthermore, if the iDRAC dedicated network port is negotiated at 100 Mbps instead of 1 Gbps (check for an orange link light), transfer speeds will crawl.
  • Xen Orchestra (XOA) / XAPI Bottlenecks: XCP-ng exports VM data through the XAPI stack by generating compressed .xva streams or full backups, which can heavily tax CPU cores on the XOA/dom0 appliance and cap throughput around 50–80 MiB/s even on fast networks. So, check with top or xentop what your dom0 load is when you have an active backup to see if the CPU and/ or memory are overburdened.
  • CPU Starvation on XOA: Backup worker processes (backupWorker.mjs) can saturate available vCPUs on the Xen Orchestra appliance if it is only allocated 2 vCPUs. Again, check with top or xentop whetgher your vCPUS are saturated.

  posted in Management

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  tjkreidl
  
• RE: Slow SR Creation

  @irtaza9 This is an iSCSI-based storage device? If so, is it on a totally separate network than the VMs and primary management interface?

  posted in Management

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  tjkreidl
  
• RE: Slow SR Creation

  @irtaza9 Is this on a single host or a pool? Are all hosts properly time-synchronized? It it related to just one specific storage device or on any, e.g., is the behavior the same on a locally-created SR? Are there any hung tasks causing unnecessary I/O on that storage device?

  posted in Management

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  tjkreidl