[gpfsug-discuss] Migrate/syncronize data from Isilon to Scale over NFS?

[Uwe Falke]

Hi Andi, 

what about leaving NFS completeley out and using rsync  (multiple rsyncs 
in parallel, of course) directly between your source and target servers? 
I am not sure how many TCP connections (suppose it is NFS4) in parallel 
are opened between client and server, using a 2x bonded interface well 
requires at least two.  That combined with the DB approach suggested by 
Jonathan to control the activity of the rsync streams would be my best 
guess.
If you have many small files, the overhead might still kill you. Tarring 
them up into larger aggregates for transfer would help a lot, but then you 
must be sure they won't change or you need to implement your own version 
control for that class of files.

Mit freundlichen Grüßen / Kind regards

Dr. Uwe Falke
IT Specialist
Hybrid Cloud Infrastructure / Technology Consulting & Implementation 
Services
+49 175 575 2877 Mobile
Rathausstr. 7, 09111 Chemnitz, Germany
uwefalke at de.ibm.com

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From:   Andi Christiansen <andi at christiansen.xxx>
To:     "gpfsug-discuss at spectrumscale.org" 
<gpfsug-discuss at spectrumscale.org>
Date:   16/11/2020 20:44
Subject:        [EXTERNAL] [gpfsug-discuss] Migrate/syncronize data from 
Isilon to Scale over    NFS?
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hi all, 

i have got a case where a customer wants 700TB migrated from isilon to 
Scale and the only way for him is exporting the same directory on NFS from 
two different nodes... 

as of now we are using multiple rsync processes on different parts of 
folders within the main directory. this is really slow and will take 
forever.. right now 14 rsync processes spread across 3 nodes fetching from 
2.. 

does anyone know of a way to speed it up? right now we see from 1Gbit to 
3Gbit if we are lucky(total bandwidth) and there is a total of 30Gbit from 
scale nodes and 20Gbits from isilon so we should be able to reach just 
under 20Gbit... 


if anyone have any ideas they are welcome! 


Thanks in advance 
Andi Christiansen _______________________________________________
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