DataCore Software Community Forum

RE: Force Partner Removal

2/2/2010 3:47:44 PM

I would strongly recommend talking with Datacore support first as they will help you through the process in the best way.

However, the correct procedure would be to unmap the LUNs from the app servers then split the mirrors. Then map linear volume back to the app server.

Make sure you split from the Datacore server you want to keep at the original location.

Then you can unpartner and it will not affect your data.

if you unpartner without first doing this, you stand a good chance of loosing both sides of the mirror.

Force Partner Removal

2/2/2010 1:58:43 PM

My company has two production SANMelody servers in front of Xiotech Emprise 5000 arrays. The DataCore servers are in a primary/secondary mirror partnership. I need break the partnership to move one of the SANs to a new location.

I've read through the help file on Partner Removal and I have a pretty good handle on the process. However, I was curious if their are any caveats that I should be concerned with?

RE: MS iSCSI Initiator on Application Server with Datacore MPIO

1/31/2010 5:38:07 PM

Have you thought about presenting the iSCSI LUNs to the DataCore server and from there presenting it out to the app servers? That way you get around that and you are managing the storage to your apps server from the same location

RE: Accelerate AIM TransferRate

1/28/2010 5:55:54 PM

It has been a while since i completed the trial.

Hardware acceleration was 6-8 times base rate compared to OpenVPN which is pretty consistently 3 times.

Since the trial i have been happily running w/ OpenVPN and even an upgrade to W2K8 x64 didn't cause issues.

However, with the steady increase in data being replicated i have scheduled the installation of Juniper WAN accelerator next month.

MS iSCSI Initiator on Application Server with Datacore MPIO

1/28/2010 2:09:48 PM

Hi,

we have a W2K3R2 SP2 Server, 32 bit as an application server. This server has Datacore MPIO installed to access four LUNs on a SANMelody 2.0 via Fibre Channel.
These LUNs are combined as one big dynamic volume.

Now we would like to attach a iSCSI device from a different vendor. For that we need MS iSCSI Initiator.
We do not want to use Microsoft MPIO.

Do you think there will be an problems when installing MS iSCSI Initiator an that system already running Datacore MPIO (using FC)?

Any hints are really appreciated!

regards
/noodles

Testing upload - please ignore

1/28/2010 12:33:37 PM

testing

RE: Accelerate AIM TransferRate

1/25/2010 3:06:56 AM

Hi
How did you OpenVPN transfer rates compare to the hardware WAN Accelerator.

Kind Regards

Perfmon, Datacore Mirroring - KB out of Sync

1/22/2010 10:20:17 AM

Hi all,

We're running a synchronous HA mirror and I've noticed that the perf counter 'KB out of sync' under Datacore mirroring is around 10GB - 16GB on the primary, and around 1.5GB on the secondary. However, all our volumes are healthy and the mirror is 100% in sync.

What is this counter? If write operations aren't acknowledged until it's finished on both SDS's then surely the KB out of sync will be 0, unless one of the volumes is in recovery?

RE: NMV Pool SAU Size for HyperV

1/18/2010 6:18:16 PM

Thanks much for the quick response.

RE: NMV Pool SAU Size for HyperV

1/18/2010 2:10:09 PM

Hyper-V may be considered in the same way as any other Windows application server, so if you are mapping the resulting virtual volumes to Hyper-V directly, then as you say, you can accept the 128MB default SAU size and everything will be fine.

If instead you are using pass-through LUNs (Vvols mapped to the guest OS directly over iSCSI) then you should follow the suggested SAU sizes for the relevant guest OS.

H.