constants.go

package stf

const (
	// These are currently in need of reconsideration.
	STORAGE_MODE_CRASH_RECOVERED   = -4
	STORAGE_MODE_CRASH_RECOVER_NOW = -3
	STORAGE_MODE_CRASH             = -2

	/* Denotes that the storage is temporarily down. Use it to stop
	 * the dispatcher from accessing a storage for a short period
	 * of time while you do minor maintenance work. No GET/PUT/DELETE
	 * will be issued against this node while in this mode.
	 *
	 * Upon repair worker hitting this node, the entity is deemed
	 * alive, and no new entities are created to replace it.
	 * This is why you should only use this mode TEMPORARILY.
	 */
	STORAGE_MODE_TEMPORARILY_DOWN = -1

	/* Denotes that the storage is for read-only. No PUT/DELETE operations
	 * will be issued against this node while in this mode.
	 *
	 * An entity residing on this node is deemed alive.
	 */
	STORAGE_MODE_READ_ONLY = 0

	/* Denotes that the storage is for read-write.
	 * This is the default, and the most "normal" mode for a storage.
	 */
	STORAGE_MODE_READ_WRITE = 1

	/* Denotes that the storage has been retired. Marking a storage as
	 * retired means that the storage is not to be put back again.
	 *
	 * Entities residing on this node are deemed dead. Upon repair,
	 * the worker(s) will try to replace the missing entity with
	 */
	STORAGE_MODE_RETIRE = 2

	/* These are only used to denote that an automatic migration
	 * is happening (XXX Unused? Legacy from a long time ago...)
	 */
	STORAGE_MODE_MIGRATE_NOW = 3
	STORAGE_MODE_MIGRATED    = 4

	/* These storages are not crashed, they don't need to be
	 * emptied out, they just need to be checked for repairments
	 */
	STORAGE_MODE_REPAIR      = 5
	STORAGE_MODE_REPAIR_NOW  = 6
	STORAGE_MODE_REPAIR_DONE = 7

	/* Denotes that the storage is a spare for the registered cluster.
	 * Writes are performed, but reads do not happen. Upon a failure
	 * you can either replace the broken storage with this one, or
	 * use this to restore the broken storage.
	 */
	STORAGE_MODE_SPARE = 10

	STORAGE_CLUSTER_MODE_READ_ONLY = 0

	STORAGE_CLUSTER_MODE_READ_WRITE = 1
	STORAGE_CLUSTER_MODE_RETIRE     = 2
)

var WRITABLE_MODES = []int{
	STORAGE_MODE_READ_WRITE,
	STORAGE_MODE_SPARE,
}

var WRITABLE_MODES_ON_REPAIR = []int{
	STORAGE_MODE_READ_WRITE,
	STORAGE_MODE_SPARE,
	STORAGE_MODE_REPAIR,
	STORAGE_MODE_REPAIR_NOW,
	STORAGE_MODE_REPAIR_DONE,
}

var READABLE_MODES = []int{
	STORAGE_MODE_READ_ONLY,
	STORAGE_MODE_READ_WRITE,
}

var READABLE_MODES_ON_REPAIR = []int{
	STORAGE_MODE_READ_ONLY,
	STORAGE_MODE_READ_WRITE,
	STORAGE_MODE_REPAIR,
	STORAGE_MODE_REPAIR_NOW,
	STORAGE_MODE_REPAIR_DONE,
}