[librpmem] is 'rpmemd daemon' a must when running demo test with single machine loopback?

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Yong Yang

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Jan 9, 2020, 5:10:55 AM1/9/20
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Running the demo code : https://software.intel.com/articles/persistent-memory-replication-over-traditional-rdma-part-2-remote-persistent-memory-101
Is rpmemd a must for this demo? I see it 's just required for remote access, up on remote target.

Tomasz Gromadzki

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Jan 9, 2020, 5:35:00 AM1/9/20
to pm...@googlegroups.com, Yong Yang
Yes,
rpmemd is a crucial element of PMDK based replication.

The simplest version of configuration - one node with a virtual loopback interface is for demonstration purposes to be able to run/experiment/taste replication procedure without the need to install any RDMA HW.
Here we use so-called fi_socket provider of libfabric (RPMEM_ENABLE_SOCKETS=1).

Tomasz


Dnia 9 stycznia 2020 11:10 Yong Yang <yong.s...@gmail.com> napisał(a):
Is rpmemd a must for this demo? I see it 's just required for remote access, up on remote target.


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Janek Mi

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Jan 9, 2020, 8:34:03 AM1/9/20
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In case you are using local replication only, libpmemobj allows using local replicas without librpmem.
e.g.:

PMEMPOOLSET
100G /mountpoint0/myfile.part0
200G /mountpoint1/myfile.part1
400G /mountpoint2/myfile.part2

# local replica
REPLICA
500G /mountpoint3/mymirror.part0
200G /mountpoint4/mymirror.part1

For details please see poolset.5.
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