Hi Mahesh,

 

Could you please help to push it? I don’t have authority to push.

Thanks.

 

Best regards,

Nhat Pham

 

From: A V Mahesh [mailto:[email protected]] 
Sent: Monday, April 4, 2016 1:24 PM
To: Nhat Pham <[email protected]>; [email protected]
Subject: Re: [opensaf:tickets] #1621 cpsv: add support for 'cloud resilience' 
feature

 



We can commit now .
Hi Nhat Pham,

We can commit now.

-AVM

On 4/4/2016 11:36 AM, Nhat Pham wrote:

Hi Mahesh,

 

The document was updated as your comments. Please have a look.

 

Best regards,

Nhat Pham

 

From: A V Mahesh [mailto:[email protected]] 
Sent: Monday, April 4, 2016 11:33 AM
To: Nhat Pham  <mailto:[email protected]> <[email protected]>; 
[email protected] 
<mailto:[email protected]> 
Subject: Re: [opensaf:tickets] #1621 cpsv: add support for 'cloud resilience' 
feature

 

Hi  Nhat Pham.





Please do update the about the limitation of no-collocated case replicas 
UN-recoverable  specific case
and to mention that ticket `#1700 cpsv: re-create the checkpoint without any 
sections in case the all replicas is lost`
will address the issue in future.

Replica is user data, any loss of user data to be cautioned in PR

-AVM




On 3/23/2016 7:47 AM, Nhat Pham wrote: 

Hi Mahesh, 

Would you have any comment about the document? If so can you please 
help to push it. Thanks. 

Best regards, 
Nhat Pham 

-----Original Message----- 
From: Nhat Pham [mailto:[email protected]] 
Sent: Monday, March 14, 2016 2:30 PM 
To: 'A V Mahesh'  <mailto:[email protected]> <[email protected]> 
Subject: RE: [opensaf:tickets] #1621 cpsv: add support for 'cloud 
resilience' 
feature 

Hi Mahesh, 

The PR was updated. Please have a look at the attachment. Thanks. 

Best regards, 
Nhat Pham 

-----Original Message----- 
From: A V Mahesh [mailto:[email protected]] 
Sent: Monday, March 14, 2016 11:52 AM 
To: Nhat Pham  <mailto:[email protected]> <[email protected]> 
Subject: Re: [opensaf:tickets] #1621 cpsv: add support for 'cloud 
resilience' 
feature 

Ok , then we will also do it. 

-AVM 

On 3/14/2016 10:17 AM, Nhat Pham wrote: 

Hi Anders, 

I see that Log service will update the PR for 'cloud resilience'. Is 
it same for the other services? 

Best regards, 
Nhat Pham-----Original Message----- 
From: A V Mahesh [mailto:[email protected]] 
Sent: Monday, March 14, 2016 11:17 AM 
To: Nhat Pham  <mailto:[email protected]> <[email protected]> 
Subject: Re: [opensaf:tickets] #1621 cpsv: add support for 'cloud 
resilience' 
feature 

It dependence : 
Is other services updating PR for  'cloud resilience' feature or just 
ok with README.HEADLESS ? 

-AVM 

On 3/14/2016 9:36 AM, Nhat Pham wrote: 

Hi Mahesh, 

Should I create a ticket to update the CPSV PR document for this feature? 

Best regards, 
Nhat Pham 

-----Original Message----- 
From: A V Mahesh (AVM) [mailto:[email protected]] 
Sent: Friday, March 11, 2016 11:09 AM 
To: [opensaf:tickets]  <mailto:[email protected]> 
<[email protected]> 
Subject: [opensaf:tickets] #1621 cpsv: add support for 'cloud resilience' 
feature 

- **status**: review --> fixed 
- **Comment**: 

changeset:   7319:6ddbce46d3e6 
tag:         tip 
user:        Nhat Pham  <mailto:[email protected]> 
<[email protected]> 
date:        Fri Mar 11 09:07:35 2016 +0530 
summary:     cpsv: Support preserving and recovering checkpoint replicas 
during headless state [#1621] 



--- 

** [tickets:#1621] cpsv: add support for 'cloud resilience' 
feature** 

**Status:** fixed 
**Milestone:** 5.0.FC 
**Created:** Mon Dec 07, 2015 08:03 AM UTC by Pham Hoang Nhat **Last 
Updated:** Wed Jan 06, 2016 08:44 AM UTC 
**Owner:** Pham Hoang Nhat 


This enhance supports to preseve checkpoint replicas in case both 
SCs down (headless state) and recover replicas in case one of SCs up 
again. If both SCs goes down, checkpoint replicas on surviving nodes 
still remain. When a SC is available again, surviving replicas are 
automatically registered to the SC checkpoint database. Content in 
surviving replicas are intact and synchronized to new replicas. When 
no SC is available, client API calls changing checkpoint 
configuration which requires SC communication, are rejected. 
Client API calls reading and writing existing checkpoint replicas 
still work. 

Limitation: 
The CKPT service doesn't support recovering checkpoints in following 
cases: 
.    The checkpoint which is unlinked before headless. 
.    The non-collocated checkpoint has active replica locating on SC. 
.    The non-collocated checkpoint has active replica locating on a PL and 
this 
PL restarts during headless. 
In these cases, the checkpoint replica is destroyed. The fault code 
SA_AIS_ERR_BAD_HANDLE is returned when the client accesses the 
checkpoint. The client must re-open the checkpoint. 
While in headless condition, accessing checkpoint replicas doesn't 
working if the node which hosts the active replica goes down. It 
will back working when a SC available again. 


--- 

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