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Latest revisions

# Date Author Comment
827ac163 01/27/2012 04:56 pm Guido Trotter

N+1: verify using minimum memory

Since instances can be started, failed over and migrated with less than
their maximum memory N+1 will use the minimum memory for verification.

Note that this accounts only for the instances being moved being
resized, and not for the ones already on the node, as ganeti will not...
d4fcd298 01/27/2012 04:56 pm Guido Trotter

admin.rst: add information about maxmem/minmem

- Specify how maxmem and minmem are used at startup, failover and
migrate
- Add a paragraph about how to manually change the runtime memory, and
what Ganeti will and won't do automatically as of version 2.6...
2a50e2e8 01/27/2012 04:56 pm Guido Trotter

walkthrough.rst: updates for maxmem/minmem

- Fix two example outputs
- Improve N+1 resolution section specifying how different memories
affect N+1 calculation depending on the node

Signed-off-by: Guido Trotter <>
Reviewed-by: Iustin Pop <>
3c1e4af0 01/26/2012 08:45 pm Iustin Pop

Fix integer overflow in Node unittest

When using a really random "extra cpus" variable, this can overflow
(especially on 32 bit) and thus the final value can be < 0, thus the
test will fail to fail.

It doesn't make sense to test with huge values, so let's just generate...
e14ddb6e 01/26/2012 06:33 pm Guido Trotter

Use allow_runtime_chgs in cmdlib

- Report the attribute value in the hooks runtime variable.
- Use it to abort migration if not enough memory is available on the
target node.

Signed-off-by: Guido Trotter <>
Reviewed-by: Michael Hanselmann <>
8c0b16f6 01/26/2012 06:33 pm Guido Trotter

cli/opcodes: add a --no-runtime-changes migrate opt

This will be used for now to avoid ballooning memory at live migration time.

Signed-off-by: Guido Trotter <>
Reviewed-by: Michael Hanselmann <>
e57602c2 01/26/2012 06:33 pm Guido Trotter

Migrate/Failover: allow less-than-max-mem op

Failover works magically after we relax the check: the start operation
will just use less memory, if less memory is available.

For migrate we need to balloon down the source memory before the
migration, if the target node doesn't have enough capacity....
c113a9ab 01/26/2012 06:33 pm Guido Trotter

Failover and Migrate: acquire node resource locks

Signed-off-by: Guido Trotter <>
Reviewed-by: Michael Hanselmann <>
081d8528 01/26/2012 06:33 pm Guido Trotter

cmdlib._CheckNodeFreeMemory: return free memory

Signed-off-by: Guido Trotter <>
Reviewed-by: Michael Hanselmann <>
1b01390b 01/26/2012 04:30 pm René Nussbaumer

doc/rapi.rst: Document ipolicy parameter

Signed-off-by: René Nussbaumer <>
Reviewed-by: Michael Hanselmann <>

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