Disk Tiering Capability
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Jerome_Lulu
September 29th, 2009
Hi Can someone direct me to information on how to install and support Disk tiering ? What are the some benefits that the disk tiering can offer?
Thanks,
Jerome
Filed under: Storage Foundation, Storage and Clustering
How to install: if you have
How to install: if you have Storage Foundation 5.0 installed, you probably have Dynamic Storage Tiering (DST)installed (unless you do a custom install that does not install VRTSvxfs and VRTSfspro). It's not a separate component. If you have Storage Foundation 4.0 or 4.1 installed, you have an older version of DST installed, which is called Quality of Storage Service (QoSS). I recommend 5.0, if you have any control.
Here are a couple of info resources. I used Linux for these examples, but they are available on AIX, HP-UX, and Solaris as well.
Foundational technologies: The first url is for multi-volume file systems, the second for volume sets; the two are the VxFS & VxVM objects, respectively used to implement DST.
http://sfdoccentral.symantec.com/sf/5.0MP3/linux/h...
http://sfdoccentral.symantec.com/sf/5.0MP3/linux/h...
DST (policies, management, etc.):
http://sfdoccentral.symantec.com/sf/5.0MP3/linux/h...
In terms of benefits -- depends on your circumstances and what kind of storage you make your different tiers out of. Reduced costs (cheap Tier 2) and improved performance (Enterprise or SSD for Tier 1) are the two most people report, but some creative customers have tied the tiers to their business objectives. One service provider discussed a design where its paying customers would get Tier 1 storage, and its non-paying customers would get Tier 2 storage.
Thanks for the information
Thanks for the information given.
I have few queries .
if a create placement policies, where can see the xml files?
Let's see not quite sure of
Let's see not quite sure of the question --
If the question is, where does VxFS store the xml file --
there is no specified location. You create the file and point VxFS to that file. VxFS then stores that XML internally. To see the XML of such a policy, you use the fsppadm (FileSystem Placement Policy ADMinistrate)
#fsppadm dump mount_point file
The file argument is the name of the new file you'd like created and populated with the policy's XML.
If you're looking for the XML Document Type Definition, it is here:
http://sfdoccentral.symantec.com/sf/5.0MP3/solaris...
And then more explanation is available on this page (and click "next" for subsequent topics):
http://sfdoccentral.symantec.com/sf/5.0MP3/solaris...
A simple sample policy
Jerome,
I thought you might find a simple example useful, so I posted a very simple DST policy in XML:
https://www-secure.symantec.com/connect/downloads/...
Storage Foundation also ships with sample XML DST policies.
In version 5.0, they are located in
In version 5.1, they will be located in
Regards,
Scott
Thanks Scott, I appreciate
Thanks Scott, I appreciate you're help.
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