LINSTOR/DRBD updates for CloudStackers | Philipp Reisner

In this session, Philipp provides a concise introduction and overview of LINSTOR and DRBD, explaining how they offer highly available block storage to VMs in CloudStack clusters. From there, Philipp presents the recently introduced features and improvements of LINSTOR and DRBD, including a discussion of the rationale behind the changes and the next items on the project’s roadmap. On the LINSTOR side, this includes: satellite restart time with thousands of resources, general scalability improvements in the range of 1,000 to 10,000 virtual volumes, and storing the master passphrase using systemd credentials (TPM chip), as well as multipathing of DRBD replication links. On the DRBD side: resync without replication, higher bitmap granularity, performance optimizations, zero-copy receive, and more. On the LINSTOR driver in CloudStack: thoughts on online migrating storage volume between primary storage.

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