[gpfsug-discuss] Underlying LUN mirroring NSD impact

Yaron Daniel YARD at il.ibm.com
Fri Mar 16 08:46:37 GMT 2018


Hi

You can have few options:

1) Active/Active GPFS sites - with sync replication of the storage - take 
into account the latency you have.
2) Active/StandBy Gpfs sites- with a-sync replication of the storage.

All info can be found at :

https://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.1/com.ibm.spectrum.scale.v4r21.doc/bl1adv_continous_replication_SSdata.htm
Synchronous mirroring with GPFS replication
In a configuration utilizing GPFS? replication, a single GPFS cluster is 
defined over three geographically-separate sites consisting of two 
production sites and a third tiebreaker site. One or more file systems are 
created, mounted, and accessed concurrently from the two active production 
sites. 
Synchronous mirroring utilizing storage based replication
This topic describes synchronous mirroring utilizing storage-based 
replication.
Point In Time Copy of IBM Spectrum Scale data
Most storage systems provides functionality to make a point-in-time copy 
of data as an online backup mechanism. This function provides an 
instantaneous copy of the original data on the target disk, while the 
actual copy of data takes place asynchronously and is fully transparent to 
the user. 


 
Regards
 


 
 
Yaron Daniel
 94 Em Ha'Moshavot Rd

Storage Architect
 Petach Tiqva, 49527
IBM Global Markets, Systems HW Sales
 Israel
 
 
 
Phone:
+972-3-916-5672
 
 
Fax:
+972-3-916-5672
 
 
Mobile:
+972-52-8395593
 
 
e-mail:
yard at il.ibm.com
 
 
IBM Israel
 
 
 
 

       



From:   Mark Bush <Mark.Bush at siriuscom.com>
To:     "gpfsug-discuss at spectrumscale.org" 
<gpfsug-discuss at spectrumscale.org>
Date:   03/14/2018 10:10 PM
Subject:        [gpfsug-discuss] Underlying LUN mirroring NSD impact
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Is it possible (albeit not advisable) to mirror LUNs that are NSD?s to 
another storage array in another site basically for DR purposes?  Once 
it?s mirrored to a new cluster elsewhere what would be the step to get the 
filesystem back up and running.  I know that AFM-DR is meant for this but 
in this case my client only has Standard edition and has mirroring 
software purchased with the underlying disk array.
 
Is this even doable? 
 
 
Mark
 
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