RE: [PoC] Non-volatile WAL buffer

Hello Fabien,

Thank you for your +1 :)

> Is it possible to emulate somthing without the actual hardware, at least
> for testing purposes?

Yes, you can emulate PMEM using DRAM on Linux, via "memmap=nnG!ssG" kernel
parameter. Please see [1] and [2] for emulation details. If your emulation
does not work well, please check if the kernel configuration options (like
CONFIG_ FOOBAR) for PMEM and DAX (in [1] and [3]) are set up properly.

Best regards,
Takashi

[1] How to Emulate Persistent Memory Using Dynamic Random-access Memory (DRAM)
https://software.intel.com/en-us/articles/how-to-emulate-persistent-memory-on-an-intel-architecture-server
[2] how_to_choose_the_correct_memmap_kernel_parameter_for_pmem_on_your_system
https://nvdimm.wiki.kernel.org/how_to_choose_the_correct_memmap_kernel_parameter_for_pmem_on_your_system
[3] Persistent Memory Wiki
https://nvdimm.wiki.kernel.org/

--
Takashi Menjo <takashi(dot)menjou(dot)vg(at)hco(dot)ntt(dot)co(dot)jp>
NTT Software Innovation Center