Monotonically increasing integers

To get unique monotonically increasing integers with strong durability, you can use the DB.GetSequence method. This method returns a Sequence object, which is thread-safe and can be used concurrently via various goroutines.

Badger would lease a range of integers to hand out from memory, with the bandwidth provided to DB.GetSequence. The frequency at which disk writes are done is determined by this lease bandwidth and the frequency of Next invocations. Setting a bandwidth too low would do more disk writes, setting it too high would result in wasted integers if Badger is closed or crashes. To avoid wasted integers, call Release before closing Badger.

  1. seq, err := db.GetSequence(key, 1000)
  2. defer seq.Release()
  3. for {
  4.   num, err := seq.Next()
  5. }