[gpfsug-discuss] Experiences with Synchronous Replication, Stretch Clusters, and Spectrum Scale <= 4.2

[Yaron Daniel]

HI

We have few customers than have 2 Sites (Active/Active using SS 
replication) + 3rd site as Quorum Tie Breaker node.

1) Spectrum Scale 4.2.3.x
2) Lenovo x3650 -M4 connect via FC to SVC (Flash900 as external storage)
3) We run all tests before deliver the system to customer Production.

Main items to take into account :
1) What is the latecny you have between the 2 main sites ? 
2) What network bandwidth between the 2 sites ?
3) What is the latency to the 3rd site from each site ?
4) Which protocols plan to be used ? Do you have layer2 between the 2 
sites , or layer 3 ?
5) Do you plan to use dedicated network for GPFS daemon ? 
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:   "Howard, Stewart Jameson" <sjhoward at iu.edu>
To:     "gpfsug-discuss at spectrumscale.org" 
<gpfsug-discuss at spectrumscale.org>
Date:   04/06/2018 06:24 PM
Subject:        [gpfsug-discuss] Experiences with Synchronous Replication, 
Stretch Clusters, and Spectrum Scale <= 4.2
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hi All,



I was wondering what experiences the user group has had with stretch

4.x clusters.  Specifically, we're interested in:



1)  What SS version are you running?



2)  What hardware are you running it on?



3)  What has been your experience with testing of site-failover

scenarios (e.g., full power loss at one site, interruption of inter-

site link).



Thanks so much for your help!



Stewart
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