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EVA to HP 3PAR StoreServ online import

Headshot 100X100.jpgBy Calvin Zito, @HPStorageGuy  vexpert 2012 logo.gif

 

One of the videos I tried to have done before Discover but wasn't able to is a demo of new software capability - EVA to 3PAR Online Import.  Today, I have that video for you.  But let's start with some background information. 

 

What is it?

EVA to 3PAR Online Import manages the migration of data from a source EVA storage system to aOnline migration overview small.png destination 3PAR storage system. Using EVA to 3PAR Online Import, you can migrate EVA virtual disks and host configuration information to a 3PAR destination storage system without changing host configurations or interrupting data access.

 

EVA to 3PAR Online Import coordinates the movement of data from the source while servicing I/O requests from the hosts. During the data migration, host I/O is serviced from the destination 3PAR storage system. The host/virtual disk presentation implemented on the EVA is maintained on the 3PAR destination.

 

How does it work?

From the migration guide, here's a bit of a description on how the online data migration works.

 

  1. The host is connected (zoned) to the source EVA storage system where its volumes reside.
  2. A destination 3PAR storage system is connected (zoned) to the source EVA. The 3PAR storage system is configured as a new host on the source EVA. All of the volumes exported to the original host are exported to the 3PAR.
  3. The 3PAR storage system "admits" these volumes, which creates a set of peer volumes that are fully backed by the data on the EVA.
  4. The host is connected (zoned) to the destination 3PAR storage system. The admitted volumes on the 3PAR are now exported (presented) to the host.
  5. The host performs the appropriate SCSI rescan/multipathing reconfiguration to detect the exported volumes from the 3PAR storage system. The exported volumes are detected as additional paths to existing EVA LUNs.
  6. Once the host detects the paths to the 3PAR storage system, the host connections to the EVA can be unzoned. The host retains access to all its data through the 3PAR connections, which are now the only paths to the host data.
  7. The 3PAR storage system begins copying data from the EVA to local storage on the 3PAR storage system. During this process, the 3PAR continues to mirror writes to the EVA, so the EVA retains a consistent copy of the data on the volumes being migrated. Once the 3PAR storage system has copied all the data on a volume to local storage, it stops mirroring writes to the EVA for that volume. The volume is now a normal local volume on the 3PAR storage system.
  8. When all of the host volumes have been copied to the 3PAR storage system, the migration is complete. The exports from the EVA to the 3PAR storage system and the host can now be removed.
  9. If no additional migrations are to be performed, the zoning between the source EVA and the destination 3PAR storage system can now be removed.

I will note there are three types of imports the software manages:

  1. Online: I described the steps above and show in this in video.  This is for non-Windows host or a virtual disk presented to a non-Windows host. During online migration, all presentation relationships between hosts and virtual disks being migrated are maintained. Host I/O to the data is not disrupted during an online migration. When a VMware host is migrated, the Online procedure is always used.
  2. Offline: when migrating one or more unpresented virtual disks. During offline migration, only the selected virtual disks are migrated. No hosts are migrated in this situation.
  3. Minimally disruptive: Selected when migrating a Windows host or a virtual disk presented to a Windows host. The host DSM used to access the storage system must be reconfigured from the EVA DSM to a DSM that will communicate with the destination 3PAR storage system. Host I/O is interrupted only during the time it takes to reconfigure the host.

 

What are the requirements?

There are a few requirements that are listed in the migration guide (a link is at the end of the blog post) but let me call out a few of them:

 

  • Source EVA storage system must be running a supported firmware level. See the SPOCK website for supported firmware versions.
  • Source EVA storage systems must be managed by Command View 10.2.
  • The destination 3PAR storage system must have a Peer Motion license installed.
  • The destination 3PAR storage system must be at InForm OS level 3.1.2. or later.
  • Source EVA storage systems must have external, not internal, FC switches.

There are more so be sure to read the migration guide.

 

So without further ado, here's the demo video showing an online migration - it's about 10 minutes long and I recommend you watch it full screen in either 720 or 1080HD mode (or maybe you can get your local movie theatre so play it on the big screen because it's a very high quality recording!).

 

 

Want to learn more?

I have a few things where you can dive deeper on this. 

Comments
Philip(anon) | ‎12-12-2012 08:02 PM

Calvin - Thanks for the video demo of this functionality.  We've had our HP partner in and HP sales engineers try and explain this, but it makes a lot of sense when you see a demo.  I'd love to see something more in-depth about how HP achieves the online migration with zero downtime for VMware.

| ‎12-12-2012 10:49 PM

Thanks Philip - I'll see if the team can help me do a demo specific to VMware or at least explain what is happening under the covers.  Great idea!

Mark Skott(anon) | ‎12-13-2012 07:54 AM

Very good explanation and video! A video or demo saying more then 1000 words... ;-)

| ‎12-13-2012 03:05 PM

Thanks Mark - glad you found the video demo helpful.  So do you want more +1000 word videos?  :smileywink:

jgillespie | ‎01-08-2013 02:30 PM

 

If the source EVA is not being managed by Command View 10.2 and the client does not have a valid software support contract are they then forced to purchase an upgrade/new LTU before they can use Online Import, or does the 3PAR Software Suite  provide a temp licence of CV 10.2 for the duration of the data migration?

| ‎01-08-2013 05:16 PM

@jgillespie Technically, you should be under a service contract to get the software updates.  However, my understanding is that the software is available in the Software Depot and there's no enforcement to ensure you have a service contract.  But I didn't tell you.  :smileywink:

PabloR(anon) | ‎03-03-2013 10:07 PM

Hi Calvin... i know that now is still not supported, do you know when EVA4000/6000/8000/6100/4100/8100 will be supported?? I am specially interested in the 6100/8000 models since i have to migrate those EVAs to a 3PAR V400. It was supposed to be available 60 days after General Availability, but still nothing. There will be a new Command View version to support them??

Dima hp(anon) | ‎05-23-2013 11:24 AM

PabloR, added suport for fw 6.250, so any eva runing it is supported for online inport

carl friedberg(anon) | ‎06-24-2013 07:53 PM

Calvin,

 

Is there a way to migrate a vdisk (in use by Hyper-V) in an semi-online way?

I can't have the host (running Hyper-V) attached to both controllers, because

it is not supported on the 3Par 7200 StoreServe. Can I have the EVA copy

the vdisk, and when the data is migrated, and it is ready to be unzoned, I

shutdown the Virtual Machine? I then go to a new host, attached only to

the 3Par, and create the VM (in Hyper-V) from the vdisks (and internal

.vhd files)? This could be a quick way to migrate the data, since the data

would be migrated under the covers?

 

I have a visio sketch which might help to clarify my need for the data migration.

Thanks,

Carl Friedberg

‎06-25-2013 10:26 PM - edited ‎07-20-2013 04:01 PM

Hi Carl -

 

A couple of suggestions:

I'll ask my 3PAR architects and see what I hear from them but I'd suggest you ask in the HP Storage Group on LinkedIn.

UPDATE: Wrong URL for the best practices white paper was fixed

| ‎06-26-2013 09:52 PM

Hi Carl - have a few options from some of my Hyper-V experts:

 

Scenario 1: OS is Windows Server 2012.

You don’t need to use EVA to 3PAR online migration tool. Assuming that HV-Source is connected to EVA and HV-Dest is connected to 3PAR.  Use Windows Server 2012 Hyper-V replica feature to create a copy of your VM from Source to Dest. The replica operation can be done while the VM is running. Once replica is created , perform a simple ‘failover’ of VM from HV-Source to HV-Dest.

 

Scenario 1a: OS is Windows Server 2012 - using Live Migration.

Possibly a “simpler” option would be to us Windows Server 2012 Storage LIVE migration.  With this option the VM’s configuration and data files can be moved to the target LUN while the VM is running and again would not require the EVA to 3PAR online migration tool.

 

Scenario 2: OS is Windows 2008 R2.

From HV-Source:

  • Export VM to an EVA LUN. The LUN will then contain VM definition file, OS VHD and data VHD
  • Perform EVA to 3PAR LUN migration
  • Shutdown VM on Source

From HV-Dest

  • Mount the 3PAR LUN
  • Import the VM from data migrated

Good luck and hope this helps!

Jandel_B(anon) | ‎07-15-2013 03:44 AM

Hi Calvin,

 

Is that so that both EVA and 3PAR should be connected on same FC switch pysically?

 

 

Thanks,

 

Jandel_B

| ‎07-20-2013 04:07 PM

Check the HP EVA P6000 to HP 3PAR StoreServ Online Import Best Practices tech white paper, section titled Technical prerequisites.

Emil(anon) | ‎11-12-2013 10:41 AM

Great article but I have a question.

In the article you state that a Peer Motion license is  required to move data from the EVA storage to 3PAR.

Is this correct? I thought the Peer Motion license enabled you to move storage between 2 different 3PAR in for example a cloud.

 

I thought only "online import" licence is required wich is included for 120 days free?

 

| ‎11-13-2013 07:03 PM

Emil - Peer Motion is required because under the covers, Online Import is basically a "flavor" of Peer Motion.   Page 8 of the EVA to 3PAR Online Import Migration Guide lists the requirements.  And the Online Migration license is valid for 180 days.

kjbagg 3 weeks ago

We just purchased a new 7400 and want to use the Online Import tool to migrate from our current EVA. 


When we try to add the 3PAr as a destination it does not connect.

 

On the 7400 under the Systems tab and then Software tab it shows that the InFrom Suite and Peer Motion are enabled yet when I click on the Peer Motion tab none of the Common Actions is available and all are grayed out.

 

Could this be my connection issue or do I need to be looking elsewhere?

3 weeks ago - last edited 3 weeks ago

@kjbagg - I'm not smart enough to be your first line resource so I highly recommend you contact HP Support.  If you haven't already read the the HP EVA P6000 to HP 3PAR StoreServ Online Import Best Practices, you should.  A couple of other things to check:

 

  1. You need the latest version of Command View - it is what configures and manages the migration.  You should have Command View 10.3.  You'll also need patch 10.3.1 if your 3PAR OS has patch P16.
  2. The Peer Motion tab on your 3PAR Management Console is only for 3PAR to 3PAR migrations - so unless you already have multiple 3PAR StoreServe Systems, you won't see anything here.

These are only a couple things I can tell you.  Do contact support.  There are two other places where you can get help from community experts:

  • Check out the independent support community, 3parug.com.  There are some very helpful 3PAR StoreServ end-users there as well as some HP folks that know way more than me. 
  • There's also an HP Community Support for HP 3PAR StoreServ.  It's growing in popularity and lots of experts helping each other there too. 

Hope that helps!

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