//lcawley Verified example output 2017-04-11
[[ml-snapshot-resource]]
==== Model Snapshot Resources

////
Model snapshots are saved to disk periodically.
By default, this is occurs approximately every 3 hours.
//TBD: Can you change this setting?

By default, model snapshots are retained for one day. You can change this
behavior with by updating the `model_snapshot_retention_days` for the job.
When choosing a new value, consider the following:

* Persistence enables resilience in the event of a system failure.
* Persistence allows for snapshots to be reverted.
* The time taken to persist a job is proportional to the size of the model in memory.
//* The smallest allowed value is 3600 (1 hour).
////

A model snapshot resource has the following properties:

`description`::
  (+string+) An optional description of the job.

`job_id`::
  (+string+) A numerical character string that uniquely identifies the job.

`latest_record_time_stamp`::
  (++) TBD. For example: 1455232663000.

`latest_result_time_stamp`::
  (++) TBD. For example: 1455229800000.

`model_size_stats`::
  (+object+) TBD. See <<ml-snapshot-stats,Model Size Statistics>>.

`retain`::
  (+boolean+) TBD. For example: false.

`snapshot_id`::
  (+string+) A numerical character string that uniquely identifies the model
  snapshot. For example: "1491852978".

`snapshot_doc_count`::
  (++) TBD. For example: 1.

`timestamp`::
  (+date+) The creation timestamp for the snapshot, specified in ISO 8601 format.
  For example: 1491852978000.

[float]
[[ml-snapshot-stats]]
===== Model Size Statistics

The `model_size_stats` object has the following properties:

`bucket_allocation_failures_count`::
  (++) TBD. For example: 0.

`job_id`::
  (+string+) A numerical character string that uniquely identifies the job.

`log_time`::
  (++) TBD. For example: 1491852978000.

`memory_status`::
  (++) TBD. For example: "ok".

`model_bytes`::
  (++) TBD. For example: 100393.

`result_type`::
  (++) TBD. For example: "model_size_stats".

`timestamp`::
  (++) TBD. For example: 1455229800000.

`total_by_field_count`::
  (++) TBD. For example: 13.

`total_over_field_count`::
  (++) TBD. For example: 0.

`total_partition_field_count`::
  (++) TBD. For example: 2.