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Replication Link Faults in HyperMetro

Created: Sep 16, 2020 09:37:31Latest reply: Sep 17, 2020 13:10:47 506 9 0 0 0
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Hello, experts.


We have deployed two Data Centers, which are mainly used as active-active data centers to ensure service continuity.

What I know is that if one data center fails, another data center can take over services. 


But I have another question, If all replication links between two data center are down, what are the running Status and link Status of the HyperMetro pair?

hypermetro

Thank you in advance!


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stephen.xu
Admin Created Sep 16, 2020 09:49:48

Posted by stephen.xu at 2020-09-16 09:40 Hello, werido!Do you deploy the quorum server?

According to your description, if only the replication link between the storage systems fails, the quorum server determines which of the two data centers wins. 


The winner will continue to provide the server and the HyperMetro pair will be in the To be synchronized state from normal (before the replication link becomes down), and the link will be disconnected.

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  • x
  • convention：

Recommended answer

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Ihteshamraza
HCIE Created Sep 16, 2020 14:12:20

Hy
let's say there are two data centers A & B, in this case , if replication link is offline, which means the link between A & B, then Quorum will pick a winner, let's say if the winner is A, then Data center A will keep on providing services and Data center B will enter invalid state, In this time, any changes made in DC A will be stored in a log file, and when the link is back online, DC B will sync with DC A using those logs. Same will be the case if DC B is picked as a winner.
@Werido
View more
  • x
  • convention：

stephen.xu
stephen.xu Created Sep 16, 2020 14:14:10 (0) (0)
 
little_fish
little_fish Created Sep 17, 2020 00:50:50 (0) (0)
good  
Ihteshamraza
Ihteshamraza Reply little_fish  Created Sep 17, 2020 07:46:17 (0) (0)
Thank You  
All Answers
(0) (0)
2#
stephen.xu
stephen.xu Admin Created Sep 16, 2020 09:40:41

Hello, werido!


Do you deploy the quorum server?

View more
  • x
  • convention：

Werido
Werido Created Sep 16, 2020 09:41:10 (0) (0)
Sure. We have deplpyed two quorum servers. backup for each other.  
stephen.xu
stephen.xu Reply Werido  Created Sep 16, 2020 09:42:19 (0) (0)
That is very good.  
(2) (0)
3#
stephen.xu
stephen.xu Admin Created Sep 16, 2020 09:49:48

Posted by stephen.xu at 2020-09-16 09:40 Hello, werido!Do you deploy the quorum server?

According to your description, if only the replication link between the storage systems fails, the quorum server determines which of the two data centers wins. 


The winner will continue to provide the server and the HyperMetro pair will be in the To be synchronized state from normal (before the replication link becomes down), and the link will be disconnected.

View more
  • x
  • convention：
(1) (0)
4#
Ihteshamraza
Ihteshamraza HCIE Created Sep 16, 2020 14:12:20

Hy
let's say there are two data centers A & B, in this case , if replication link is offline, which means the link between A & B, then Quorum will pick a winner, let's say if the winner is A, then Data center A will keep on providing services and Data center B will enter invalid state, In this time, any changes made in DC A will be stored in a log file, and when the link is back online, DC B will sync with DC A using those logs. Same will be the case if DC B is picked as a winner.
@Werido
View more
  • x
  • convention：

stephen.xu
stephen.xu Created Sep 16, 2020 14:14:10 (0) (0)
 
little_fish
little_fish Created Sep 17, 2020 00:50:50 (0) (0)
good  
Ihteshamraza
Ihteshamraza Reply little_fish  Created Sep 17, 2020 07:46:17 (0) (0)
Thank You  
(1) (0)
5#
Werido
Werido Created Sep 17, 2020 13:10:47

Thank you both.

very useful answers
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  • x
  • convention：
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