Sadly, backupset
does not contain failed backups, and I don't know of anywhere else in msdb
these may be stored, unless you can rely on sysjobhistory
, which doesn't contain all of time (depending on your retention settings), and which would ignore any backup attempts that were made outside the context of a job, and which - in the case of a job that backs up many databases - would not provide differentiation about which database actually failed, unless it happened to happen early on in the job - this is because the messaging is quite verbose but gets truncated.
If you absolutely know that Job n
only backs up the one database, and that every failure of that job means that the database wasn't backed up (since the job could also fail after the backup succeeded, e.g. trying to shrink or perform other maintenance), then you could use a query like this:
DECLARE @job sysname, @db sysname;
SELECT @job = N'Job 1', @db = N'db_name';
SELECT
bs.database_name,
bs.backup_start_date,
bs.backup_finish_date,
[Total Time] = CAST((DATEDIFF(SECOND, bs.backup_start_date,bs.backup_finish_date))
AS varchar(30))+ ' secs',
CAST(bs.backup_size/1024/1024 AS decimal(10,2)) AS 'Backup Size(MB)',
h.[message]
FROM msdb.dbo.sysjobhistory AS h
INNER JOIN msdb.dbo.sysjobs AS j
ON h.job_id = j.job_id
AND h.step_id = 0
LEFT OUTER JOIN msdb.dbo.backupset AS bs
ON bs.database_name = @db
AND
ABS(DATEDIFF(SECOND, bs.backup_start_date, CONVERT(DATETIME,convert(char(8),h.run_date)
+ ' ' + STUFF(STUFF(RIGHT('0'+CONVERT(char(6),h.run_time),6),3,0,':'),6,0,':')))) < 5
WHERE j.name = @job
ORDER BY bs.backup_start_date;
Yes, it's really ugly, because sysjobhistory
still, in SQL Server 2014 even, stores run_date
and run_time
as separate integers. I bet whoever made that decision is still on the background of dartboards all over building 35. It also assumes that the backup is the very first step in the job, hence the rather less than scientific date/time comparison to make sure we've properly correlated the right instance of the job to the right instance of the backup. Oh, how I wish I could redesign the schema for backups and jobs.
If you want broader scope outside of the job, you can look for failed backups in the SQL Server error log (if they haven't been cycled away):
EXEC sp_readerrorlog 0, 1, 'BACKUP failed'; -- current
EXEC sp_readerrorlog 1, 1, 'BACKUP failed'; -- .1 (previous)
EXEC sp_readerrorlog 2, 1, 'BACKUP failed'; -- .2 (the one before that)
....
(But I don't know of a nice and easy way to incorporate that output into your existing query.)
You can also correlate "missing" successful backups from the default trace, e.g.
DECLARE @path nvarchar(260);
SELECT
@path = REVERSE(SUBSTRING(REVERSE([path]),
CHARINDEX(CHAR(92), REVERSE([path])), 260)) + N'log.trc'
FROM sys.traces
WHERE is_default = 1;
SELECT dt.DatabaseName, dt.StartTime, bs.backup_start_date, bs.backup_finish_date,
[Status] = CASE WHEN bs.backup_start_date IS NULL
THEN 'Probably failed'
ELSE 'Seems like success'
END
FROM sys.fn_trace_gettable(@path, DEFAULT) AS dt
LEFT OUTER JOIN msdb.dbo.backupset AS bs
ON dt.DatabaseName = bs.database_name
AND ABS(DATEDIFF(SECOND, dt.StartTime, bs.backup_start_date)) < 5
WHERE dt.EventClass = 115 -- backup/restore events
AND UPPER(CONVERT(nvarchar(max),dt.TextData)) LIKE N'BACKUP%DATABASE%'
--AND dt.DatabaseName = N'db_name' -- to filter to a single database
--AND bs.database_name = N'db_name'
ORDER BY dt.StartTime;
Of course this also relies on the data from the default trace cycling away, the database name not having changed, etc. And unfortunately, the default trace doesn't differentiate between successful and failed backups, and the start time will not precisely match the MSDB data, but as long as you're not running backups in a loop, this should be okay for eyeballing. I've tried to incorporate these issues into the query.
Finally, you may want to use a FULL OUTER JOIN
there, in case backupset has longer history than the default trace. This changes the semantics of [Status]
slightly.
You also might want to give this nasty thing a try, though I didn't have much luck with it. I was only able to see the current or most recent status, so that only helped when the job failed the last time it ran, and - like sysjobhistory
- wasn't able to obtain information about any backups that were attempted but not through a job.
why it show most of the automatically backup taken in virtual device with
"NT AUTHORITY\SYSTEM" user name & by default it shows the backup with
virtual device & their some virtual location.
This is because some tool or windows server native backup feature is taking a Snapshot backup of SQL Server. Such backups normally use NT AUTHORITY\SYSTEM
and SQL Server VSS writer service
to connect to perform Snapshot backup.
Please note since you said there is no third party backup scheduled I have guessed here that it might be windows native backup. If you want to find more about such backup start the profiler and capture the events when backup is running. Or you can schedule the profiler. I must say profiler can create load so be aware about that so be selective in events when configuring the profiler.
Workaround:
If you are very much certain that you don't need this backup, which IMO is useless as compared to native TSQL backup, you can go ahead and disable SQL Server VSS writer service
. You can go to Services.msc and you would find this service there and then disable it.
If this backup will going on continuation manner. Is there any impact of my Audit Data?
No, such backup is not going to have any affect on your data but yes it would be utilizing system resource when running.
Best Answer
Does this StackOverflow answer point you in the right direction? Specifically if you look at the
device_type
column from thebackupmediafamily
table, what do you see? You can find the list of types in the API doc:I'm almost wondering if that's a CNAME or some sort of name reference to the actual path, but it may be dependent on the above.
This is likely the relevant part from the above answer to what you're seeing: