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This situation is covered by [ticket 33785](https://bugs.torproject.org/33785). If this problem
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occurs, it might be worth [rebalancing the cluster](#rebalancing-a-cluster).
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The following dashboards can help you choose the less busy nodes to use:
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- CPU usage: [gnt-dal](https://grafana.torproject.org/d/gex9eLcWz/cpu-usage?orgId=1&refresh=1m&var-class=role::ganeti::dal&var-node=All&var-show_cpu_count=or), [gnt-fsn](https://grafana.torproject.org/d/gex9eLcWz/cpu-usage?orgId=1&refresh=1m&var-class=role::ganeti::fsn&var-node=All&var-show_cpu_count=or)
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- Memory usage: [gnt-dal](https://grafana.torproject.org/d/amgrk2Qnk/memory-usage?from=now-24h&to=now&var-class=role::ganeti::dal&var-node=All&var-show_cpu_count=or&orgId=1&refresh=1m), [gnt-fsn](https://grafana.torproject.org/d/amgrk2Qnk/memory-usage?from=now-24h&to=now&var-class=role::ganeti::fsn&var-node=All&var-show_cpu_count=or&orgId=1&refresh=1m)
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- LVM Disk usage: [gnt-dal](https://grafana.torproject.org/d/f7887271-1a77-4138-ad16-28be8b0ad0ab/lvm-disk-usage?orgId=1&var-class=role::ganeti::dal&var-vg_name=All&var-instance=All), [gnt-fsn](https://grafana.torproject.org/d/f7887271-1a77-4138-ad16-28be8b0ad0ab/lvm-disk-usage?orgId=1&var-class=role%3A%3Aganeti%3A%3Afsn&var-vg_name=All&var-instance=All)
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* **ping failure**: there is a bug in `ganeti-instance-debootstrap`
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which misconfigures `ping` (among other things), see [bug
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31781](https://bugs.torproject.org/31781). It's currently patched in our version of the Debian
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