Defragmentation on the Domino server

Does anyone have any experiences of defragging databases on the Domino server. I have two mail servers on which the backups take twice as long as the others and now believe this is down to fragmentation. While volume level fragmentaton is the same on these as other servers the average fragments per file (as reported by contig.exe) is way higher.

On a test server I have defragged individual databases using contig.exe with Domino up and running and saw no problems - even names.nsf while I was intentionally using it from a Notes client.

However I’d be nervous about doing this on a live server so thought I’d ask on here.

I have read about the two products defrag.nsf (Defrag.NSF+ ) and the free DominoDefrag on openntf (which actually seems to use contig.exe anyway) and both of these purport to work with Domino up.

All though/experiences appreciated.

Subject: Defragmentation on the Domino server

We’ve been using DefragNSF from Preemptive for several years. In runs perfectly on our Domino servers. Over the years we have moved from Domino 8.0.2 up to 8.5.3 and from physical to VMS servers, and from W2k3 to W2k8 and DefragNSF still works the same. It has never affetced any other Domino process or our backups. It runs in ‘stealth’ mode and does the job…

Subject: thanks - stealth mode means with Domino server up I presume?