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Using CAM6 to run the same experiment with different cores, the results vary greatly
What compset are you using (i.e is it a CAM-only F compset or a fully coupled compset like a B compset?) CAM F compsets are intended to give identical results independent of the PE layout. If you are experiencing this with a F compset, please give us the details requested in:https://bb.cgd.ucar.edu/cesm/threads/information-to-include-in-help-requests.4974/
If this is a B compset, changing PE layout is expected to change answers. If you want to control this behavior, there is a bfbflag documented at: 3.5. Bit-for-bit flag — CIME master documentation
If this is a B compset, changing PE layout is expected to change answers. If you want to control this behavior, there is a bfbflag documented at: 3.5. Bit-for-bit flag — CIME master documentation
I am very glad and honored to receive your reply.This is the first time I've posted a question. I am sorry that some of the content is not very clear.
I use the compset F2000climo(CAM-only F compset) to run a case.I changed nothing and ran the same case with different numbers of nodes(each node has 28 cores).Their results vary widely. For example, temperatures can vary by five degrees or more in winter.The version is CESM2.1.3.
I don't know what to do about it.Looking forward to your reply.THANK U,sir.
I use the compset F2000climo(CAM-only F compset) to run a case.I changed nothing and ran the same case with different numbers of nodes(each node has 28 cores).Their results vary widely. For example, temperatures can vary by five degrees or more in winter.The version is CESM2.1.3.
I don't know what to do about it.Looking forward to your reply.THANK U,sir.
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am very glad and honored to receive your reply.This is the first time I've posted a question. I am sorry that some of the content is not very clear.What compset are you using (i.e is it a CAM-only F compset or a fully coupled compset like a B compset?) CAM F compsets are intended to give identical results independent of the PE layout. If you are experiencing this with a F compset, please give us the details requested in:https://bb.cgd.ucar.edu/cesm/threads/information-to-include-in-help-requests.4974/
If this is a B compset, changing PE layout is expected to change answers. If you want to control this behavior, there is a bfbflag documented at: 3.5. Bit-for-bit flag — CIME master documentation
I use the compset F2000climo(CAM-only F compset) to run a case.I changed nothing and ran the same case with different numbers of nodes(each node has 28 cores).Their results vary widely. For example, temperatures can vary by five degrees or more in winter.The version is CESM2.1.3.
I don't know what to do about it.Looking forward to your reply.THANK U,sir.