Module garage_rpc::layout

Re-exports

• pub use manager::WriteLock;

Modules

• manager

Structs

• LayoutHelper
• LayoutHistory
  The history of cluster layouts, with trackers to keep a record of which nodes are up-to-date to current cluster data
• LayoutParameters
  This struct is used to set the parameters to be used in the assignment computation algorithm. It is stored as a Crdt.
• LayoutStaging
  The staged changes for the next layout version
• LayoutVersion
  A version of the layout of the cluster, i.e. the list of roles which are assigned to each cluster node
• NodeRole
  The user-assigned roles of cluster nodes
• NodeRoleV
• RpcLayoutDigest
• SyncLayoutDigest
• UpdateTracker
  Generic update tracker struct
• UpdateTrackers
  The tracker of acknowlegments and data syncs around the cluster

Enums

• ZoneRedundancy
  Zone redundancy: if set to AtLeast(x), the layout calculation will aim to store copies of each partition on at least that number of different zones. Otherwise, copies will be stored on the maximum possible number of zones.

Constants

• MAX_NODE_NUMBER
• OLD_VERSION_COUNT
  Number of old (non-live) versions to keep, see LayoutHistory::old_versions
• PARTITION_BITS
  How many bits from the hash are used to make partitions. Higher numbers means more fairness in presence of numerous nodes, but exponentially bigger ring. Max 16

Type Aliases

• CompactNodeType
• Message
• Partition
  A partition id, which is stored on 16 bits i.e. we have up to 216 partitions. (in practice we have exactly 2PARTITION_BITS partitions)