Storage & Clustering Community Blog

Doreet | 09 Jan 2013 | 0 comments

Hosting some 1.3 billion website visits each month, LivePerson understands how to scale big. The CSO for the largest provider of realtime customer engagement solutions explains how the firm is leveraging Veritas Cluster Server to meet business-critical requirements around cloud services availability and deliver on its SLAs for customers.

http://www.symantec.com/resources/customer_success/detail.jsp?cid=liveperson

Flexibility added to PanicSystemOnDGLoss

Pooja Sarda | 02 Nov 2012 | 0 comments

The VCS DiskGroup agent has a configurable option PanicSystemOnDGLoss. It enables fast failover of application on loss of storage connectivity or when disk group commands are not responding. On extremely busy systems, it can cause halting of the system due to consecutive monitor timeouts. Prior to VCS 5.1, it was set to on (1) by default. Based on feedback, we changed the default from on (1) to off (0). However, we could still only turn on/off the behavior. With VCS 6.0, we have added flexibility to set it to a value based on the use case.

0: Do not halt the system.

1: Halt the system if either disk group goes into disabled state or the disk group resource faults due to monitor timeout.

2: Halt the system if disk group goes into disabled state.

3: Halt the system if disk group resource faults due to monitor timeout.

Applying Oracle patches on SF Oracle RAC nodes

Priya 2 | 02 Nov 2012 | 0 comments

Before installing any Oracle RAC patch or patchset software:

■ Review the latest information on supported Oracle RAC patches and patchsets:
http://www.symantec.com/business/support/index?page=content&id=DOC5081

To apply Oracle patches

1 Freeze the service group that contains the Oracle resource and the cssd
resource:
# hagrp -freeze grp_name

2 Install the patches or patchsets required for your Oracle RAC installation.
See the Oracle documentation that accompanies the patch or patchset.
If the patch is for Oracle database software, after applying the patch, before
starting the database or database instance, relink the SF Oracle RAC libraries
with Oracle libraries.

3 Unfreeze the service group that contains the Oracle resource and the cssd
...

Simplify management and high availability of application in LPARs and LPARs themselves!

Pooja Sarda | 02 Nov 2012 | 0 comments

Would you like to simplify management and high availability of LPARs (AIX logical partitions) and application running inside it? Are you moving to the private cloud?

Try our ApplicationHA for LPARs and make your application in the LPAR and the LPAR itself highly available. You can achieve this with Veritas Cluster Server in just one LPAR per physical server and light weight ApplicationHA in rest of the LPARs.

The ApplicationHA LPARs will auto-register, auto-restart and auto-failover! And that‘s not all. We support across platforms - VMWare, Solaris LDOMs and Linux KVM. More information can be found at https://www.symantec.com/application-ha.

Customer Success: Yapi Kredi Bank Transforms IT with Symantec Solutions

Kimberley | 02 Nov 2012 | 0 comments

During his tenure at Yapi Kredi Bank, Cahit Erdogan has overseen rapid growth and expansion. Dealing with growth is never easy, especially in IT, but with the help of a number of Symantec solutions Erdogan has been able to tackle the challenge head on. Since partnering with Symantec the bank has realized a number of benefits including improved security, lower storage costs, and high availability of business critical data and applications. Check out this case study in CIO Digest to read more about Yapi Kredi Bank’s success. http://bit.ly/V2E7uA

Forsythe Helps Customers Embrace The Cloud

ttron | 01 Nov 2012 | 0 comments

Great testimonial from one of our top SAMG partner discussing Storage Foundation and Cluster File System.

http://www.symantec.com/tv/products/details.jsp?vid=1932583047001

Symantec Goes to NetApp Insight

c3lsius | 09 Jan 2013 | 0 comments

Will you be attending any of the NetApp Insight conferences? Symantec will be there on:

Nov 5-8, Las Vegas, Nevada
Nov 13-16, Dublin, Ireland
Dec 11-13, Macau PRC

Stop by the Symantec booth and attend our breakout presentation to learn more about our on-going partnership with NetApp and data protection and storage availability solutions. Hope to see you there!

Checking SCSI3 compatibility for fencing coordinator disks

Hema V | 01 Nov 2012 | 0 comments

Based on the common escalations that I had handled for the fencing module in Veritas Cluster Server Product in the SAMG Division, one frequently visited aspect is to check the SCSI3 comaptibility the coordinator disks used for fencing.

As a best practice, it is always better to run the vxfentsthdw utility to check if the intended coordinator disks are infact, SCSI3 compatible. This step is a pre-requisite before installing/configuring fencing module in 'enabled' state for SCSI3 mode or 'customized' mode provided atleast one SCSI3 disk is involved.

However in some cases especially scenarios for array qualification, we have noticed that vxfentsthdw returns success because the underlying VxVM-DMP module returns success even if the intended operation did not succeed. Hence to make sure such scenarios are not applicable in your environment, it is better to run the following commands, in addition to running vxfentsthdw utility on the coordinator disks:

...

Configuring LLT on windows servers - Ethernet vs UDP/IP

deepak rawal | 27 Oct 2012 | 0 comments

Configuration wizard for creating a cluster provides option to setup LLT with Ethernet or UDP/IP protocol. This post provides some details on which option to choose.

Cluster configuration wizard (VCW) detects NIC cards available for configuring LLT network links on each windows server. Selecting NIC(s) for each server configures LLT to use Ethernet protocol. If is important to make sure that each NIC is connected (either directly OR via a layer 2 switch) via separate network hardware for increased fault tolerance. This is relatively easy to ascertain for Ethernet, since connection traverses a few network components. All windows servers connected to same Ethernet are able to discover each other (ARP) dynamically. This makes changing network configuration for cluster relatively simple. LLT traffic network overhead is low. For large number of virtual machines hosted on a hypervisor in a datacenter, this type of...

Troubleshooting Fast Failover Configuration

Kushal Shah | 01 Nov 2012 | 0 comments

If failover is slow even after setting FastFailover attribute, check the following on all the nodes under cluster.

– Fast failover feature is installed.

– Fast failover license is present.

– Check SCSI-3 settings.

• Can be verified from VEA GUI under Control Panel>System Settings, SCSI support tab.

• During VMDG resource online, following error message is displayed in VEA GUI if SCSI-2 is set and Fast failover is enabled.

“Fast failover is supported only with SCSI-3.”

– Dissimilarity in number of disks on active and passive nodes.

• Check for the number of missing disks under the diskgroup on both...

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