Posts Tagged ‘File Archiving’

Registry settings for CommVault support with ExtremeZ-IP and ArchiveConnect

Monday, October 3rd, 2011

When configuring ExtremeZ-IP and ArchiveConnect to work with CommVault archives, there are 2 specific registry configurations that need to be made.

1) In the ExtremeZ-IP registry: “ServerUsesRelativeHandles” should be set to 0.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\ExtremeZ-IP\Parameters4\Refreshable\ServerUsesRelativeHandles

After making this registry change, go to the ExtremeZ-IP Administrator, click the Settings button, and click the “Refresh Registry” button to have this change take effect.

2) In the CommVault registry: “GXHSM_IGNORE_ALT_STREAM_RECALLS” needs to be set to ‘Y’.
HKEY_LOCAL_MACHINE\SOFTWARE\CommVault Systems\Galaxy\Instance001\WinFSDataMigrator\ GXHSM_IGNORE_ALT_STREAM_RECALLS

This change requires that you restart the CommVault services to take effect.

Mac OS X 10.4 (Tiger) limitations with ArchiveConnect on StorNext volumes

Tuesday, March 29th, 2011

There are two use-cases that can cause inadvertent recall of files archived via StorNext when using Mac OS X 10.4 clients.

The first is the use of Get Info to view file details.

The second is the use of Column View in Finder.

Both of the above read metadata utilizing methods that are unblockable by the ArchiveConnect software. The workaround for these two issues is to not use them; Get Info is an action that is user-initiated, and Column View is one of several options for viewing file lists in Finder. A better solution is to upgrade to a later version of Mac OS X.

How Is File Archiving (Or HSM) Different Than Backup?

Tuesday, August 18th, 2009

The differences between file archiving and backup are easy to understand.

Backup is a process of making a copy of a file in a safe place in case the original is lost due to deletion, over-writing, file corruption, disk or other hardware failure or disaster. If a user wants to retrieve a file from a backup, they need to make a request to their IT staff who can search for it and retrieve a copy. The need to involve IT makes the retrieval process slow and expensive.

File archiving is the process of moving infrequently used files to a cheaper storage medium while providing a self-service function that allows end users to search for and retrieve the files. There are several ways to provide this self-service function and a popular approach is to leave a small “stub file” or “placeholder file” in the original location and move a complete copy of the original file to the archive . This stub file is very small, usually a few kilobytes, but it allows the user to easily find the file in its original location. To retrieve a file from the archive, the user simply opens the file and the archiving software retrieves and returns it to its original location. File archiving solutions often provide other functions such as indexed search, data de-duplication and non-repudiation.

Since IT is not involved in the retrieval process, retrieval from a file archiving system is much cheaper and faster than retrieval from a backup system.

ArchiveConnect targets customers using the stub file or placeholder file approach to file archiving.

Learn More
You can learn more about the differences between file archiving and backup by reading these two articles on Wikipedia:

Backup
http://en.wikipedia.org/wiki/Backup

File Archiving (also known as HSM)
http://en.wikipedia.org/wiki/Hierarchical_storage_management