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HC_GA Absent Member.
Absent Member.
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“Performing Exchange consistency check of logs” takes a longer time

I’ve been going through all the logs in Data Protector to try and sort out its problems..

 

Do you know what this means with regard to the Exchange backup: “Performing Exchange consistency check of logs”?

It’s taking an addition 1.5 hours to complete compared to previous backups.

 

I installed 4 updates a few weeks ago per HP support's request, not sure if that caused this.

 

Thanks!

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5 Replies
HC_GA Absent Member.
Absent Member.

Re: “Performing Exchange consistency check of logs” takes a longer time

I'm assuming this is related to missing backups and the Exchange logs are larger so take longer to complete the consistency check. Since the Exchange backup finally completed last night I'm assuming the backup tonight should resume normal timeframes for the checks..

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Matevz Mrak_1 Absent Member.
Absent Member.

Re: “Performing Exchange consistency check of logs” takes a longer time

Consistency check is impacted by log size. For VSS backups you can also disable it, see Consistency check in VSS integration manual.

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Mass2 Absent Member.
Absent Member.

Re: “Performing Exchange consistency check of logs” takes a longer time

Ask for a fix @ support.  It was made some time ago, it will reduce consistency check to few seconds. It's possible that the fix was not included in patch. What DP version is it ?

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HC_GA Absent Member.
Absent Member.

Re: “Performing Exchange consistency check of logs” takes a longer time

Thanks guys, this returned to normal after Exchange completed a full backup.

Sorry about the delay responding, I thought the forum would email me when replies were received.

 

A few seconds would be amazing, it takes about 1.5 hours currently.

The version we're running is A.08.10, build 201.

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Bob_Clark Absent Member.
Absent Member.

Re: “Performing Exchange consistency check of logs” takes a longer time

The Consistency check is purely an Exchage function. The DP improvement spoken of previously was to have teh process started just one as opposed to having it start many hundreds of times

 

This is explained in the Exchange Integration Guide

 

 

Perform consistency check

 

 

If this option is selected, Microsoft Exchange Server checks the consistency of a database's backup data. If this option is not selected, the check is performed on the backup media after the backup data is created. If the data is found corrupt, it is discarded and the database backup fails.

 

 

If the Check log files only option is selected, only the backup data of the log files is checked, which is enough for Microsoft Exchange Server to guarantee data consistency.

 

Default: selected

 

By default, the consistency check is I/O intensive, which can negatively affect disk performance. The Throttle check for 1 second option throttles down the consistency check of the database file .edb to lessen impact

on the disk performance. Specify after how many input/output operations the check should stop for one second.

 

This option is not available if only the log files are checked.

 

Default: not selected

 

In my Exchange Integration Guide, Figure 62 shows a screenshof this to show how and where Consistency Check is set

 

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