PMEM Allocator for standard template library???

[Minseon Ahn]

Hello, experts.

Is there any class or variable of pmem allocator for standard template library?

I would like to create a vector in DRAM, but store the contents of the vector in the pmem.

Since std::vector has a constructor with an allocator, I think there could be a pmem allocator.

std::vector<T,Allocator>::vector

explicit vector( const Allocator& alloc );

If there was a similar question previously, would you let me know a link to the answer?

Thanks in advance.

Best Regards,

Minseon Ahn

[Igor Chorążewicz]

Hello,

The answer depends on whether you want to use PMEM as volatile memory pool or persistent storage. If it's the first case you can use pmem_allocator from memkind library (https://github.com/memkind/memkind).
If you want to make elements in your vector persistent then having vector in DRAM would be dangerous (possible persistent memory leak). In that case I would suggest using pmem::obj::vector ( http://pmem.io/2019/02/20/cpp-vector.html  ). This vector have the same interface as std::vector but stores data in PMEM and takes care of data consistency.

Igor

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