This post is more than 5 years old
121 Posts
0
2175
NS20 code upgrade and Replication
We have two NS20 devices with replication Version 1. We will be upgrading the NAS code on primary NS20 device and before the upgrade, I need to abort the replication as the new NAS code supports Version 2 replication. After the code upgrade on both the devices do I need to redefine the replication from the scratch? Or is it just going to continue?
Appreciate some can mail me the link for the technical material for replication version 2 through Celerra Manager.
Thanks
BillStein-Dell
Moderator
Moderator
•
285 Posts
0
November 23rd, 2009 14:00
Yes, this is correct. The wizard will help you set up your interconnects, create the destination filesystem, run the full copy and start replication.
Remember that before you can begin replication, you will be doing a nas_copy, not a nas_replicate. You have to have a complete filesystem copy at the distant end before replication can begin. So you can monitor this initial copy using the nas_copy command, not nas_replicate.
BillStein-Dell
Moderator
Moderator
•
285 Posts
1
November 21st, 2009 18:00
Avilt1
121 Posts
0
November 21st, 2009 18:00
"Once they are there, you can schedule a convenient time to do a V1 to V2 upgrade."
Could you please elaborate. Does it mean I have to remove the replication completely and then redefine the replication from the scratch?
Appreciate some URL link for RIP V2 thru celerra manager. Whats is the primary difference between V1 and V2?
In the new NAS code, Under Replications (Celerra manager) I see 3 tabs, Replications, Celerra Network Servers and Data Mover Interconnects. I do not see the Availabel Destinations which was available in V1. How do I setup replication in V2 thru Celerra manager?
BillStein-Dell
Moderator
Moderator
•
285 Posts
1
November 21st, 2009 23:00
Not at all. Once you are ready, your local team will be able to help you run through a V1 to V2 upgrade. This will preserve all your existing replication sessions; there is no need to delete them at all.
While I don't have a manual specifically dedicated to Celerra Manager (the online help in Celerra Manager is very thorough), I do have a manual for Replication Version 2 which may help alleviate some of your concerns. You can find it here: http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-004-188.pdf
There are a tremendous number of improvements between version 1 and version 2. Specifically, there are improvements in the following areas:
When you are ready to perform the conversion from V1 to V2, your field support personnel or Authorised Service Representative will assist you with the transition. You should then be able to see everything on your Celerra Manager sessions. The manual above should help you understand how you will set up V2 sessions in the future, when your V2 conversion is complete.
Avilt1
121 Posts
0
November 22nd, 2009 21:00
Thank You for the information. We have decided to remove the existing V1 replication completely and establish V2 replication to a new server.
I am trying to set this is up thru Celerra Manager. In V1 the replication setup(defining file system) was done at remote server. But in V2, I think its on Source server. Am I correct?
Also what is the command to monitor the replication progress OR % of replication that is complete? The command nas_replicate -info only shows the status of the replication.
Avilt1
121 Posts
0
November 23rd, 2009 17:00
Thank You.
I am looking for more information on "Data Mover Interconnect"
Whats is the purpose of Name Service Interface Names? What happens when this is not resolved to IP address?
BillStein-Dell
Moderator
Moderator
•
285 Posts
1
November 23rd, 2009 20:00
Peter_EMC
674 Posts
0
November 23rd, 2009 22:00
Name Service Interface Names is like DNS for Interface Names.
If the interface name is not resolvable, the replication will not work, because the datamover does not know how to communicate with this interface.
To avoid resolving issues of interfaces use IP Addresses when configuring replication.
Avilt1
121 Posts
0
November 24th, 2009 16:00
1. If I have more than 2 file systems to be configured for replication, what is the recommendation? Shall I define multiple "Data Mover Interconnect"?
2. I have 100mbps WAN bandwidth available between the source and remote site. One file system (500GB) configured for replication with default values. The current transfer rate is 724KBPS and the router bandwidth utlization is around 10Mbps. Can I force the replication to use more available bandwidth for quick completion of initial replication?
Thank You for your response.