Mayastor

Mayastor is a cloud-native declarative data plan, targeting performance requirements for IO-intensive workloads. It currently is an Alpha feature, intended for early adopters and advanced users to experiment with the new features before those features are production-ready.

NOTE: Mayastor isn't recommended for production workloads, as you may encounter some breaking changes when the product moves from alpha to stable version.

Prerequisites:

• 2 x86-64 CPU cores with SSE4.2 instruction support:
  Intel Nehalem processor (march=nehalem) and newer
  AMD Bulldozer processor and newer
• 4GB memory
• Mayastor Daemonset must have privileged mode enabled.
• Mayastor DaemonSet (MDS) requires:
  2MB hugepages support

  
  
  2MB Huge Pages must be supported and enabled on a storage node. A minimum number of 512 such pages must be available on each node.
  To verify HugePage availability, execute:

  grep HugePages /proc/meminfo

  Sample Output:

  AnonHugePages: 0 kB
  ShmemHugePages: 0 kB
  HugePages_Total: 1024
  HugePages_Free: 671
  HugePages_Rsvd: 0
  HugePages_Surp: 0

  If the number of available pages are less than 512, the page count should be configured based on the requirements of other co-resident workloads. For example,

  echo 512 | sudo tee /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

  
  To make the change persistent across reboots you need to add the value in /etc/sysctl.conf.
  
  

  After modification of huge page configuration, you need to either restart the kubelet or reboot the node.

  
  
  

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Supported features:

• Creation of a Mayastor pool using block device attached to the node.
• Mayastor Volume management using CSI drivers.
• Support for accessing the Mayastor Volumes using iSCSI and NBD
• Kubernetes Custom Resources for Mayastor Pool and Volumes, and Mayastor Storage Volume (MSV) showing the status of the Volume.
• Support for Prometheus metrics and sample Grafana dashboard
• Workload protection via n-way synchronous replication