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January 29th, 2008 07:00

Virtual provisioning with replication

Probably a stupid question - but I can't find the answer anywhere so perhaps someone here knows.

I want to use virtual provisioning with a file system so I've given it an initial size of 50 GB which can expand up to 100GB with virtual provisioning.

I have replicated this file system to a remote celerra, but this file system doesn't have virtual provisioning enabled and the checkbox to do so is greyed out.

So my question is, what happens at the remote end when the local file system is expanded because the virtual provisioning high watermark is reached?

Thanks,
Sheppie

6 Operator

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8.6K Posts

January 29th, 2008 07:00

thats normal. the manual "Using Celerra Replicator P/N 300-002-725" says:

Automatically extending the file system size
File systems in a replication relationship can be extended automatically. For
replication, the Automatic File System Extension policy can be set on the source file
system only
. When it is applied, the destination file system is extended, then the
source file system, just as with a manual extension. This feature is used on file
systems created using AVM only.


Basically it is only set on the source system since the source system will drive the expansion.

Both with manual and automatic file system expansion what happens when you expand a replicated file system is that in the background it first tries to expand the destination fs. Only if that suceeeds it will expand the source fs.

This is to prevent you from being stuck with a fs that cant be replicated in case the destination doesnt have free space

1 Rookie

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108 Posts

January 29th, 2008 07:00

OK, thanks for clearing that up for me.

Sheppie.
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