Re: seeding my georeplication

[Aravinda <avishwan@xxxxxxxxxx>]

Answers inline,

@Kotresh, please add if I missed anything.

regards
Aravinda VK
http://aravindavk.in

On 06/23/2017 06:29 PM, Stephen Remde wrote:

I have a ~600tb distributed gluster volume that I want to start using geo replication on.

The current volume is on 6 100tb bricks on 2 servers 

My plan is:

1) copy each of the bricks to a new arrays on the servers locally

Before start copying,
- Enable changelog in Master volume, using `gluster volume set <volname> changelog.changelog on`
- Record the Timestamp. This is required to set the marking once Geo-rep session is created.
- Gluster Geo-replication replicates the data with same GFID in target, so if we are copying data manually we should ensure that GFIDs remains same and properly linked as hardlinks in the .glusterfs directory.

2) move the new arrays to the new servers

3) create the volume on the new servers using the arrays 

4) fix the layout on the new volume

5) start georeplication (which should be relatively small as most of the data should be already there?)

After creating the Geo-replication session it will try to start from the beginning, to avoid that set the marking in each bricks before starting Geo-replication saying till this time data is synced to Slave. Once started, it will start from this timestamp.(I can provide script for the same)

Is this likely to succeed?

Any advice welcomed.

--

Dr Stephen Remde
Director, Innovation and Research

T: 01535 280066
M: 07764 740920
E: stephen.remde@xxxxxxxxxxx
W: www.gaist.co.uk

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