Snapmirror will continue to work until Jochen moves to a . release (ie, 7.0 vs 7.1). He is currently running two releases in the 7.0 family. This is similar to using 6.4.1 vs 6.4.2 for comparison purposes.

FWIW, QSM would not really care at all unless you had a file type that only existed on one release (ie, if you wanted to, QSM would work between 6.2 and 6.4 - but it wouldn't be able to move LUNs to the 6.2 system). Even though it should work, I wouldn't recommend it.

As for the performance problem, I'd start with some questions:

WHAT is slow (CIFS? NFS?) WHEN is it slow (Morning? Afternoon?) WHO is it slow for (all clients? Only some?)

Then I'd communicate with NetApp Global Services (the support center in particular) to gather a perfstat and continue troubleshooting this issue.

For example - if the CPU is never beyond 40% to 60%, the '-P flat' flag will probably not be of much use.

FYI - Perfstat only automates command execution for things that already exist in ONTAP (many are in 'advanced' or 'diag' modes. If you wanted to, you could probably start with statit to see what is going on... but I'd definitely recommend speaking with NGS first, and they'll likely recommend perfstat as well.

Glenn

-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Philip Boyle Sent: Thursday, June 01, 2006 6:33 AM To: Willeke, Jochen Cc: toasters@mathworks.com Subject: Re: performance problems with filer and snapmirror

Hi Jochen,

I would have thought the snapmirror relationship would be now broken given the release differentiation? Should the R200 not require a minimum of ONTAP 7.0.4 in order to continue mirroring data from the source ( FAS3050 )?

I found ONTAP 7.0.1R1 to be quite buggy and has numerous snapmirroring bugs fixed in ONTAP 7.0.4. In particular BURT 157883 which allowed me to oversubscribe my containing aggregate.

http://now.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=157883

In order to debug your existing problem, I'd advise running 'perfstat' on FAS3050 and asking Netapp Support to review the output.

perfstat.sh -f 'filername' -t 5 -i 3,0 -P flat >> 'logfile'

Regards, Philip

On Thursday 01 June 2006 09:17, Willeke, Jochen wrote:

Hello toasters,

today we have a few problems with a FAS3050 (Ontap 7.0.4) which is

very

slow, as the users tell me. When i do a sysstat i see the CPU always between 40 and 60% which is not too much.

I also had a look at the ocupied space in the aggregates and it should be ok, too. According to this we have a snapmirror-relation to a Nearstore R200 (Ontap 7.0.1R1) which is very slow. The network is not the bottleneck as we have an own storagenet (1Gb Ethernet) for these systems.

I now wonder where is shall look for deeper analysis. I am a little confused right now. Perhaps anybody can help with some kind of

commands

different to sysstat :-)

Best Regards

Jochen