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June 18th, 2008 05:00
Migrating from NS700 DART 5.5
Hi,
We are about to replace NS700 with NS80, the problem is replication.
We replicate the NS700 to remote NS500 all running DART 5.5.
The new systems running DART 5.6.
We can't afford stopping the replication to DR for more than few days.
The main issue is if there is a way to replicate from DART 5.5 to 5.6 (back to back).
Is there an option to upgrate the IP Replicator ver 1 to ver 2 with no downtime?
10x!!!
We are about to replace NS700 with NS80, the problem is replication.
We replicate the NS700 to remote NS500 all running DART 5.5.
The new systems running DART 5.6.
We can't afford stopping the replication to DR for more than few days.
The main issue is if there is a way to replicate from DART 5.5 to 5.6 (back to back).
Is there an option to upgrate the IP Replicator ver 1 to ver 2 with no downtime?
10x!!!
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Rainer_EMC
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June 18th, 2008 06:00
Is it remote - i.e. is network performance an issue ?
Since Replicator is only supported between systems running the same major release, your options are:
1) Install the new NS80 with 5.5 and continue using Replicator 5.5
2) upgrade the NS500 to 5.6 (special permission required since we're still in the 90 day period).
Then there is an upgrade skript that will convert RepV1 sessions to RepV2 without downtime.
Basically this will first create the new framework for RepV2, stop RepV1 and create a common checkpoint on both systems and then start RepV2 doing an incremental update between the live file system and that checkpoint
You will need a downtime for upgrading from 5.5 to 5.6 though. But you'll also need a downtime to migrate from the NS700 to the NS80
qq11
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June 19th, 2008 13:00
When was DART 5.6 released - I actually mean when will the upgrade process will not require special permission?
We didn't get the systems yet, so maybe it would be best to wait for the upgrade to be approved with no special permissions.
We are going to replace both systems.
Is there a way to install replicator v2 without upgrading the DART? If not - I guess we will have to upgrade both old systems to 5.6.
We plan to bring the new systems (NS84 and NS41) to the primary site, replicate from the old production (NS704g) to new (NS84), stop replication between the 2 old systems, move to production with the NS84, re-establish replication between the 2 new systems (back to back), and then send the NS41 to DR site (2 hours drive).
We only allowed to stop replication to DR site for no more than a week.
Any suggestions?
Rainer_EMC
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June 19th, 2008 14:00
When was DART 5.6 released - I actually mean when will the upgrade process will not require special permission?
5.6 was released arond March 26
As to when to upgrade is generally available you need to ask your local EMC contact
My guess its going to be with the next maintenance release
Any new systems are shipping with 5.6 by default from the factory (unless you specifically order them with 5.5)
upgrade both old systems to 5.6.
No
either that or downgrade the new systems to 5.5
(NS704g) to new (NS84), stop replication between the 2 old systems, move to production with the NS84,
re-establish replication between the 2 new systems (back to back), and then send the NS41 to DR site (2 > hours drive).
sounds like a good plan.
that shouldnt be a problem at all
read up on the RepV2 documentation
There are some new concepts like time-based bandwidth control and cascading and 1-2 replication
qq11
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June 22nd, 2008 00:00