Netbackup 7.6.0.2 master/media server and client.
In order to use synthetic backups I have turned on True Image Restore, but am finding the TIR data is being pruned too soon.
Initially I found my differentials were running as fulls and Synthetic Fulls were only partially complete because of missing TIR data.
I was seeing warning messages about "old TIR file /usr/openv/netbackup/tir_info/.../NetBackup_file_info is missing. Backing up everything in <path>".
I found the configuration section in the master server properties where this TIR data pruning time interval can be adjusted (default is 1 day). I have adjusted this up to 120 days but am finding the data is still being pruned at about 10 days.
My backups (~100TB) take about 2 weeks to complete over our dedicated WAN link and I am finding that by the time the next incremental attemts to run, the missing TIR data causes the incremental to effectively be a full. This becomes a viscious circle and I can never seem to get ahead.
Does anyone know if TIR data pruning can go past 10 days? I couldnt find any upper limit in the docs.
Am I missing some other fundamantal issue?
Thanks for any help
Robert
