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Storage and Availability Management
Showing posts tagged with Dynamic Multi-Pathing and Dynamic Multi-Pathing for VMware
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Raissa_T | 14 Sep 2011 | 0 comments

Storage Decisions - "Where IT pros go to solve the storage challenges you face NOW" is coming to New York City on Sept 19th - Sept 20th, 2011.  The event will be held at the Hilton Americas 1335 Avenue of the Americas New York, NY 10019.   Come and join your fellow IT pros and stop by booth # 39 to learn how Symantec continues to be your trusted Storage partner. 

In particular, Symantec can help you address the challenges of business-critical virtualization and how you can achieve end-to-end visibility of your heterogeneous storage and host infrastructure, while increasing efficiency at each level of the storage supply chain.

  • Learn how you can report on wasted storage hosted on native or Symantec Storage Foundation systems, perform optimized thick to thin migrations, reclaim wasted storage allocations in thin provisioned arrays, and plan for...
Raissa_T | 06 Jul 2011 | 0 comments

For some organizations, the idea of virtualizing their mission critical applications is perceived to be more riskier and its advantages are not yet compelling to make the switch.  In fact, according to Symantec's latest Virtualization and Evolution to the Cloud Survey, 40% of CEOs and 42% of CFOs are reluctant to make the leap to virtualization.  Some of the cited reservations are around downtime and the lack of visibility into virtualized environments.  However, IT users can get around these challenges by making sure that they deploy virtualization tools that are suited for their particular needs. A foolproof virtualization plan can deliver cost savings, efficiency, increased productivity, high availability, disaster recovery, etc.  Recently, Dan Lamorena, Product Marketing Director within Symantec's Storage and Availability Management Group authored an article in the ...

c3lsius | 28 Feb 2011 | 0 comments

Join us at Symantec's biggest annual user conference at Vision 2011, which will be at Caesars Palace in Las Vegas between May 2nd and 5th. The Storage and Availability Management team will bring you new information about our latest products including:

  • Veritas Operations Manager 4.0 or VOM, which enables administrators to manage heterogeneous applications, server and storage environments with a single pane of glass. VOM is a free comprehensive management platform for Storage Foundation and Cluster Server environments enabling customers to maximize their investments while automating operations and therefore minimizing IT costs.  
  • Our virtualization offerings, such as VirtualStore and ApplicationHA, help companies protect applications in virtual machines and reduce the storage costs that come with going virtual.
  • FileStore, one of Symantec's hardware products, and learn more about our appliances strategy.

Don't miss our...

jmartin | 20 Jan 2011 | 1 comment

Late last year, we changed the name of Veritas Operations Services (VOS) to Symantec Operations Readiness Tools (SORT) [http://sort.symantec.com]  and we enhanced the site to help new users understand more about the available features. 

As you’ve likely seen, the main SORT webpage is geared toward educating new users about SORT features and functions. 

For previous VOS users, we suggest going directly to the MySORT page (http://mysort.symantec.com).  MySORT is the old VOS home page with a few minor changes.  You’ll see a color template difference but the old VOS functionality is still there including enhancements based on previously received feedback.

If you just want to use the tools and services, go to the MySORT page and get started (http://mysort.symantec.com).  You can generate reports for...

bgoodyear | 31 Aug 2010 | 0 comments

Blogger Jerome Wendt recently posted an entry about Veritas Dynamic Multi-Pathing (DMP) on his site.  You can read what he has to say about DMP and the fact that it is now available as a standalone product.  Check out his entry at:

http://symantec.dciginc.com/2010/08/symantecs-dmp-no-strings-attached.html

Now DMP is available as a standalone product to support file systems other than VxFS.  It is available now on Solaris, AIX, and Linux.  Coming in November, DMP as a standalone product will be available on HP-UX and Windows.  DMP is still included with Storage Foundation and will be in the future.  The advantage with DMP as a separate product is that now DMP can be added to an existing server without having to convert any file systems to VxFS. 
 

Ameya | 03 Aug 2007 | 1 comment
Array Policy Module (APM)

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The APM framework was introduced in Volume Manager 4.0 release. The 4.0 release brought about a major change in DMP architecture - the introduction of APM. As the name suggests, the Array Policy Module (APM) is specific to an array type and defines the policies for an array type. Analogous to its Array Support Library (ASL) counterpart in user space which enables the DDL to identify the array completely, the APM enables DMP kernel to perform array specific operations such as failover, NDU (Non-Disruptive Upgrade), STPG (Set Target Port Groups) and even an I/O policy.

The APM makes it possible for DMP to dynamically add kernel support for an array. The support for enabling an APM is completely online and does not require a reboot. An APM is essentially a dynamically loadable kernel module that is validated and loaded by DMP whenever DMP detects the array type support exported by that APM. In other words, the DDL...

Ameya | 13 Apr 2007 | 1 comment

The first basic function for a multi path (MP) driver is to identify the set of block devices that can be supported. The device discovery is generally triggered when the MP driver is loaded into the operating system (OS) as part of boot process. During early boot, not all devices connected to the system may be available. For example, the devices connected using the fibre channel (FC) cables may not be available during early boot time unless there is special support from the bootstrap, which is usually from NVRAM or EEPROM, to identify the fibre channel devices. In any case, it may be required for a MP driver to rescan the OS device tree at a later stage of boot process.

One of the biggest challenges in device discovery is the ability and skill of MP driver to discover disk devices and their attributes in a non-intrusive fashion such that the disk media is not touched. In other words, the device discovery has to be purely read-only operations to identify the disk and disk...

Ameya | 02 Apr 2007 | 0 comments

The Dynamic Multi Path (DMP) capability was first introduced in Volume Manager 2.5.7 release primarily to support A/A multi path arrays from Sun Microsystems. In those days, the early version of arrays had SCSI connections with fat and thick cables running from host to the array directly. Unlike the present day modern arrays, there was no concept of fabric switches, and no fiber channel (FC) technology enabled on the arrays. The first DMP could do only multi path operations such as load balancing using balanced path I/O policy, path failures and restoration by using SCSI inquiry commands. Since the number of devices were handful, the error processing and restore processing were all single threaded tasks. Further, as the number of supported arrays was small, the entire device discovery and reconfiguration was closely tied to the parent operating system.

The next major enhancements of DMP were introduced in Volume Manager 3.1.1 release that had support to co-exist with...