Home > SP2010 > Take control of your log files

Take control of your log files

Everyone knows about SharePoint’s ULS logs, these are written by the SharePoint tracing service.

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To the location set in Central Admin –> Monitoring –> Configure Diagnostic logging 

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You also have a couple of options to control the number of logs created and /or the amount of space used making SharePoint log space friendly, you should be writing the logs to a non-system drive.

But what about IIS ?  In IIS logging can either be on or off, and you can change their location, but that’s about it.

From the IIS console select Logging and open the feature

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From here you can set the location for the IIS logs, a location set here will be used for all the sites on the server, and it should be on a non-system drive.

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The IIS log location will look something like this, with a number of sub-folders, one for each web application.

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the folder names (after the W3SVC) will tally with web site id shown in IIS

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each folder will contain a number if log files, normally one created per day.

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This folder names will be the same on all your servers as the site ids are replicated, the only problem with this is that the IIS logs never get cleaned-up. To help address this I have written a quick PowerShell script, that will delete log files over 30 days old.

 

# PS script used to delete IIS logs from sub folders
# set the location to start from
# $location = "D:\logs\iis" use the lines below to read in a location from the command line
$location = $args[0]
if (! $location)
{$location= Read-Host "Enter location to cleanup"}
# get a reference to each file from each subfolder by using the -recursive switch.
foreach ($File in get-childitem $location -Recurse -Include *.log)
# check the lastwrite time and delete if necessary
{if ($File.LastWriteTime -lt (Get-Date).AddDays(-30))
     {del $File}}

The location can either be set in the script or read in when you run it, the –Recuse argument causes Get-Child item to walk through nested folders, with the –Include argument putting a filter on log files, with the –30 value specifying how old a file has to be in days to be deleted.

This can wrapped in a simple batch file and called from a weekly scheduled task to keep your IIS files under control.

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Categories: SP2010 Tags: , ,

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