Is it possible to dump memory from one VM to another?

ROODAY 6

I'm trying to find a way to transfer process state between spots VMs, i.e. when a Spot VM gets the eviction notice, spin up another one and dump the full memory state into the new vm so it can continue working when the first one gets deleted. Does there exist a built in azure way to do this, or does Ubuntu/linux have any tools for RDMA?

Sumarigo-MSFT 46,441 Reputation points Microsoft Employee

2020-11-23T14:42:08.727+00:00

@ROODAY Even if we dump memory, and by the time we transfer to another system, there would be a delay in time, and not sure how we will start from the dump.
I think these (Spot VMs) will be useful in case of HPC workloads, Where the master server distributes the load to worker servers, if one of them fails, the master server would know which one failed.
https://azure.microsoft.com/en-us/blog/azure-linux-rdma-hpc-available/

However, let check once with the internal team for more info
ROODAY 6 Reputation points

2020-11-25T14:51:13.613+00:00

Ok thanks! Is there at least a way to dump the entirety of memory to a file, and then restore memory from that file? Like lets say I had a gameserver running and I wanted to stop the server, I'd want to do a memory dump before stopping so when I restart I can have the server running immediately (e.g. solving the cold start problem of rebooting the desired program).

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Is it possible to dump memory from one VM to another?

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