Revision 2a50e2e8 doc/walkthrough.rst
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- initrd_path: default () |
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Hardware: |
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- VCPUs: 1 |
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- memory: 128MiB |
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- maxmem: 256MiB |
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- minmem: 512MiB |
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- NICs: |
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- nic/0: MAC: aa:00:00:78:da:63, IP: None, mode: bridged, link: xen-br0 |
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Disks: |
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node1# gnt-instance modify -B memory=4G instance1 |
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Modified instance instance1 |
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- be/memory -> 4096 |
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- be/maxmem -> 4096 |
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- be/minmem -> 4096 |
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Please don't forget that these parameters take effect only at the next start of the instance. |
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node1# gnt-instance modify … |
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- try to manually move instances around (but this can become complicated |
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for any non-trivial cluster) |
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- try to reduce memory of some instances to accommodate the available |
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node memory |
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- try to reduce the minimum memory of some instances on the source node |
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of the N+1 failure (in the example above ``node1``): this will allow |
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it to start and be failed over/migrated with less than its maximum |
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memory |
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- try to reduce the runtime/maximum memory of some instances on the |
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destination node of the N+1 failure (in the example above ``node2``) |
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to create additional available node memory (check the :doc:`admin` |
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guide for what Ganeti will and won't automatically do in regards to |
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instance runtime memory modification) |
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- if Ganeti has been built with the htools package enabled, you can run |
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the ``hbal`` tool which will try to compute an automated cluster |
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solution that complies with the N+1 rule |
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