[IQUG] Restore of IQ snapshot

Ron Watkins rwatkins at dssolutions.com
Thu Aug 24 07:21:55 MST 2017


I don't have an exact value, but it's not very high.

 

From: Baker, Chris [mailto:c.baker at sap.com] 
Sent: Thursday, August 24, 2017 6:53 AM
To: Ron Watkins; iqug at iqug.org
Subject: RE: [IQUG] Restore of IQ snapshot

 

Out of curiosity, how busy is the CPU of the host at that time?  I'm
wondering if the IQ server is not able to make an OS call to get the
datetime, or nothing returns from the host.

 

Probably worth a look by engineering.

 

Chris

 

Chris Baker | Database Engineering Evangelist | CERT | PI HANA Platform Data
Management | SAP

T +1 416-226-7033 <tel:+1%20416-226-7033>  | M +1 647-224-2033
<tel:+1%20647-224-2033>  | TF +1 866-716-8860 <tel:+1%20866-716-8860> 

SAP Canada Inc. 445 Wes Graham Way, Waterloo, N2L 6R2
<x-apple-data-detectors://17/1> 

c.baker at sap.com | www.sap.com <http://www.sap.com/> 

 

https://sap.na.pgiconnect.com/I826572

Conference tel: 1-866-312-7353,,9648565377#
<tel:1-866-312-7353,,9648565377%23> 

 

From: Ron Watkins [mailto:rwatkins at dssolutions.com] 
Sent: Thursday, August 24, 2017 9:48 AM
To: Baker, Chris <c.baker at sap.com>; iqug at iqug.org
Subject: RE: [IQUG] Restore of IQ snapshot

 

Im actually restoring on the same host using a set of soft-linked snapshot
luns, so server time doesn't come into play here.

Specifically, it sais the datetime is "0", which is an odd value. As is
normal, a re-run of exactly the same steps resolved the issue.

This is a periodic issue, happens only sometimes. Im thinking something in
the virtual backup is not being set correctly and the restore is picking up
that invalid value.

I cannot reproduce on demand, but it does happen fairly frequently, probably
once a week or so.

 

From: Baker, Chris [mailto:c.baker at sap.com] 
Sent: Thursday, August 24, 2017 6:39 AM
To: Ron Watkins; iqug at iqug.org
Subject: RE: [IQUG] Restore of IQ snapshot

 

I haven't seen this before, but does the time of the restore node match the
time of the backed up node or is the IQ restore trying to restore on what is
effectively an earlier time?  Are they the same timezone (and is it a valid
definition of a timezone).  Also make sure your client (if not running on
the node) also has its time set correctly.

 

I generally set all nodes to use the same NTP server to ensure they are all
in sync and there is no drifting.

 

If the times are the same, then you may need to open a support ticket.
Perhaps we are missing something to do with timezones, etc.

 

Also make sure all nodes are up-to-date with OS patches.  I always see a
timezone patch when I run an update.

 

Chris

 

Chris Baker | Database Engineering Evangelist | CERT | PI HANA Platform Data
Management | SAP

T +1 416-226-7033 <tel:+1%20416-226-7033>  | M +1 647-224-2033
<tel:+1%20647-224-2033>  | TF +1 866-716-8860 <tel:+1%20866-716-8860> 

SAP Canada Inc. 445 Wes Graham Way, Waterloo, N2L 6R2
<x-apple-data-detectors://17/1> 

c.baker at sap.com | www.sap.com <http://www.sap.com/> 

 

https://sap.na.pgiconnect.com/I826572

Conference tel: 1-866-312-7353,,9648565377#
<tel:1-866-312-7353,,9648565377%23> 

 

From: iqug-bounces at iqug.org [mailto:iqug-bounces at iqug.org] On Behalf Of Ron
Watkins
Sent: Thursday, August 24, 2017 9:29 AM
To: iqug at iqug.org
Subject: [IQUG] Restore of IQ snapshot

 

When performing a restore of IQ virtual backup to snapshot luns, I sometimes
get this error. Does anyone recognize the error? It doesn't happen all the
time, just sometimes.

 



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