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Knowledgebase:
Programmatically finding the last backup date
26 July 2016 02:47 PM

Introduction

Looking at the MarkLogic Admin UI, you may have noticed that the status page for a given database displays the last backup date and time for a given database. We have been asked in the past how this gets computed so the same check can be performed using your own code. This Knowledgebase article shows examples that utilise XQuery to get this information and explores the possibility of retrieving this using the MarkLogic ReST API

XQuery: How does the code work?

The simple answer is in the forest status for each of the forests in the database (note these values only appear if you have created a backup already).  For the sake of these examples, let's say I have a database (called "test") which contains 12 forests (test-1 to test-12).  I can get the backup status using a call to our ReST API:

http://localhost:8002/manage/LATEST/forests/test-1?view=status&format=html

In the results returned, you should see something like:

last-backup : 2016-02-12T12:30:39.916Z datetime
last-incr-backup : 2016-02-12T12:37:29.085Z datetime

In generating that status page in the MarkLogic Admin UI code, we create an aggregate - a database doesn't contain documents in MarkLogic, it contains forests and those forests contain documents.

Continuing the example above (with a database called "test" containing 12 forests) if I run the following: