PMDK v1.12.0 Release

  • Date: 25 May, 2022

We’ve just released a new version of PMDK. I’d like to thank everyone who contributed.

In this release, we are deprecating the librpmem library and rpmemd tool. Using the librpmem library API will result in warnings and is no longer recommended. Those libraries and remote replication in libpmemobj were our experiments to try out ideas on combining persistent memory with RDMA. We learned from this experiment that this approach is not a good way to combine those technologies. Based on these learnings, we implemented the librpma, which is currently developed by our team and can be accessed on the github repository. The old approach has become a considerable maintenance cost for the team, blocking some potential PMDK optimizations. This is the final warning, before removing librpmem, along with remote replication in libpmemobj, in the next PMDK release, so please let us know if you have any concerns with this decision.

In this release, we also introduce asynchronous data movement operations in the libpmem2. This API is marked as experimental, and to enable it, you have to #define PMEM2_USE_MINIASYNC before #include <libpmem2.h>. Additionally, this API requires that you also have the miniasync library installed. To learn more about this feature, miniasync library, and our overall approach to the asynchronous programming with persistent memory, please read our blog posts

Other changes and notable bug fixes:

  • pmem2: Add new API to machine safe read/write operations
  • common: Adds experimental support for RISC-V
  • common: supress false positve of ‘-Wunused-parameter’
  • examples: remove unnecessary persists in pminvaders
  • obj: fix invalid type when setting cache size ctl (pmem/issues#5291)
  • pmem: fix eADR memmove and memset (pmem/issues#5364)
  • pmem2: add addr alignment prediction to vm reservation
  • pmreorder: update docs with required last arg - file_name
  • pmreorder: add more debug/info logs

This release introduces no changes to the on-media layout and is fully compatible with the previous version of PMDK.

As always, this release is available on GitHub: