Question

Daylight Saving Time (DST) triggers Full Files to Tape backup of complete repository?


Userlevel 1

Hi there in Virtual World :)

Running Veeam 11 - We experienced a complete full “Files to Tape” backup when the daily Tape job ran for the first time after entering Daylight Saving Time (DST) last weekend.

ALL files in our backup Disk repository (xx TB) - that means UNCHANGED Veeam backup files from the last 4 months - was all sent to Tape once again - taking several job-runtime days to finish - and filling up a lot of new Tapes, which we needed to supply into the Tape library.

Have anybody else experienced similar issues?

As far as I have read  - Veeam operates in the UCT format - which should not be sensitive due Server time changes or DST - except changes in the local job time schedule:

Daylight savings time - Veeam R&D Forums

Daylight saving switch changes job start time - Veeam R&D Forums

 

We didn`t have any other issues running the usual VM Machine jobs to disk.


This issue has been raised to the Veeam Support - and it has been escalated to their RnD engineers.
So hopefully they will soon find the root cause and the fix for it - so that we never run into the phenomenon again.
 


7 comments

Userlevel 7
Badge +6

Never seen this issue before myself but interested in what is found with this case.

Userlevel 7
Badge +6

I have never seen this behaviour in my environments, too.

Please keep us updated on this topic.

Userlevel 7
Badge +3

Same here, not experienced the issue. 

Userlevel 7
Badge +3

I have never seen this behaviour in my environments, too.

Please keep us updated on this topic.

Same as Joe :)

Userlevel 7
Badge +4

Never seen nor heard of. As with others...interested to see the resolution. @Leo A. ..have you opened a support case with Veeam? Wonder what they have to say.

Cheers!

Userlevel 1

Hi Guys - thanks for your patience

- Veeam support also keeps me updated every week - with thanks for my patience :)

It seems that Veeam RnD still struggles to solve the issue in the current version 11 - but from support I have just received this statement:

“This behavior will be fixed in one of our future versions of product (most likely UTC time will be used in database).
“Before implementation of the new logic we have to run the SQL script after Daylight Savings time switch to avoid full backup run.”

I have asked the support a few question about this  - and whether they will announce the bug - and how to handle with a “date-reset” script.
The send me a script - to use BEFORE the full backup runs after Daylight Saving Time change.….
I don`t know whether I can and are allowed to publice the script here?

I wonder why this issue only concern Files backup - and not VM Machine backups.
As I understand from other forums UTC is actually used in config. DB - to avoid international time issues - but maybe not for Files backup?? 

Cheers
Leo

Userlevel 7
Badge +6

Wonder if the new PostgresSQL for v12 will have the same issue.  Be interesting to test and see.

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