Hi All,
Need some information regarding Full and Differential backup on 2 node SQL AAG. My doubt is, if full and diff backups are done on different nodes would we be able to apply the diff backups to full backup (from different nodes).
We are planning to have below setup:
- 2 Node SQL 2016 AAG- Lets says Node A & Node B
- Full & Differential backups to a network share on primary (sys.fn_hadr_is_primary_replica)
- Full Backup - Sunday
- Differential Backup - Monday to Saturday
- Transactional Log Backup - Hourly
Let's say if full and diff backups are done as below
Node A - Primary - Sunday - Full backup on Node A
- Monday - Diff backup on Node A
- Failover on Tuesday
Node B - Primary - Tuesday - Diff backup on Node B
- Wednesday - Diff backup on Node B
Can we restore ...
Full backup from Sunday (taken on Node A when it was primary)
with the Diff backup from Tuesday (taken on Node B - which was <g class="gr_ gr_1380 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar only-ins replaceWithoutSep" data-gr-id="1380" id="1380">primary</g> node on Tuesday)?
i.e. are we able to restore Sunday's full backup with Monday's diff backup as they are done on different nodes?
Could you please point to any link (if there is) to documentation with this information?
Thanks for the information.