[gpfsug-discuss] Best way to migrate data

[Dwayne.Hart at med.mun.ca]

Hi JAB,

We do not have either ILM or HSM. Thankfully, we have at minimum IBM Spectrum Protect (I recently updated the system to version 8.1.5). 

It would be an interesting exercise to see how long it would take IBM SP to restore a user's content fully to a different target. I have done some smaller recoveries so I know that the system is in a usable state ;)

Best,
Dwayne

-----Original Message-----
From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Jonathan Buzzard
Sent: Friday, October 19, 2018 6:39 AM
To: gpfsug-discuss at spectrumscale.org
Subject: Re: [gpfsug-discuss] Best way to migrate data

On 18/10/2018 18:19, Dwayne.Hart at med.mun.ca wrote:
> Hi,
> 
> Just wondering what the best recipe for migrating a user’s home 
> directory content from one GFPS file system to another which hosts a 
> larger research GPFS file system? I’m currently using rsync and it has 
> maxed out the client system’s IB interface.
> 

Be careful with rsync, it resets all your atimes which screws up any hope of doing ILM or HSM.

My personal favourite is to do something along the lines of

   dsmc restore /gpfs/<username>

Minimal impact on the user facing services, and seems to preserve atimes last time I checked. Sure it tanks your backup server a bit, but that is not user facing. What do users care if the backup takes longer than normal.

Of course this presumes you have a backup :-)


JAB.

-- 
Jonathan A. Buzzard                         Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG _______________________________________________
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