[LSF/MM TOPIC] Software RAID Support for NV-DIMM

Johannes Thumshirn
2019-02-15T09:57:15Z

(This is a joint proposal with Hannes Reinecke)

Servers with NV-DIMM are slowly emerging in data centers but one key feature
for reliability of these systems hasn't been addressed up to now, data
redundancy.

While it would be best to solve this issue in the memory controller of the CPU
itself, I don't see this coming in the next few years. This puts us as the OS
in the burden to create the redundant copies of data for the users.

If we leave of the DAX support Linux' software RAID implementations (MD,
device-mapper and BTRFS RAID) do already work on top of pmem devices, but they
are incompatible with DAX.

In this session Hannes and I would like to discuss eventual ways how we as an
operating system can mitigate these issues for our users.

Byte,
Johannes

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Johannes Thumshirn SUSE Labs Filesystems
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