News
2/8/2010
04:14 PM
George Crump
George Crump
Commentary
50%
50%

The Importance Of QoS In Automated Tiering

In a conversation I had a few weeks ago with Pillar Data's CEO, Mike Workman, we discussed his recent blog entry on the "Auto Tiering of Data". In this blog he brings up several important considerations as vendors and users begin to examine automated tiering. One I'd like to elaborate on is QoS in Automated Tiering.

In a conversation I had a few weeks ago with Pillar Data's CEO, Mike Workman, we discussed his recent blog entry on the "Auto Tiering of Data". In this blog he brings up several important considerations as vendors and users begin to examine automated tiering. One I'd like to elaborate on is QoS in Automated Tiering.Quality of Service (QoS) of course has been with us in networks for a while. We have it enabled in IP routers, we are beginning to see it in network interface cards and now we are even seeing it in fibre channel networks with NPIV. Automate tiering now brings this to storage, where active data is automatically migrated up to faster storage, like SSD or even DRAM and inactive data is gradually migrated down to slower SATA based storage. This is a great start and compared to the alternative should provide a performance boost in almost every situation.

Merely identifying active data and moving it to a high performance tier is a brute force method that should eventually give way to a more intelligent method where possible. Just because data is active does not mean that it should go on the fastest and most expensive tier of storage. In most automated tiering environments the fast tier is going to be a finite repository and it may be impractical to keep all the active data on that tier. Really active but non-important data could prohibit slightly less active but important when accessed data from ever making it to the high speed tier.

What is needed is a more granular QoS capability in automated tiering systems. The ability to exclude or include data by type or location for example. Eventually these systems need to learn who the requester is. If it is from a small number of users on a relatively slow network connection, leave the data on mechanical storage. If the requester is an application or a high number of users then move the data up to the performance tier.

For the time being Solid State Disk and DRAM are finite resources. You want to make sure that you are not only putting active data on these tiers but data that can actually take advantage of the tier.

Track us on Twitter: http://twitter.com/storageswiss

Subscribe to our RSS feed.

George Crump is lead analyst of Storage Switzerland, an IT analyst firm focused on the storage and virtualization segments. Find Storage Switzerland's disclosure statement here.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
10 Recommendations for Outsourcing Security
10 Recommendations for Outsourcing Security
Enterprises today have a wide range of third-party options to help improve their defenses, including MSSPs, auditing and penetration testing, and DDoS protection. But are there situations in which a service provider might actually increase risk?
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-8893
Published: 2015-01-28
Multiple cross-site scripting (XSS) vulnerabilities in (1) mainpage.jsp and (2) GetImageServlet.img in IBM TRIRIGA Application Platform 3.2.1.x, 3.3.2 before 3.3.2.3, and 3.4.1 before 3.4.1.1 allow remote authenticated users to inject arbitrary web script or HTML via a crafted URL.

CVE-2014-8894
Published: 2015-01-28
Open redirect vulnerability in IBM TRIRIGA Application Platform 3.2.1.x, 3.3.2 before 3.3.2.3, and 3.4.1 before 3.4.1.1 allows remote authenticated users to redirect users to arbitrary web sites and conduct phishing attacks via the out parameter.

CVE-2014-8895
Published: 2015-01-28
IBM TRIRIGA Application Platform 3.2.1.x, 3.3.2 before 3.3.2.3, and 3.4.1 before 3.4.1.1 allows remote attackers to bypass intended access restrictions and read the image files of arbitrary users via a crafted URL.

CVE-2014-8917
Published: 2015-01-28
Multiple cross-site scripting (XSS) vulnerabilities in (1) dojox/form/resources/uploader.swf (aka upload.swf), (2) dojox/form/resources/fileuploader.swf (aka fileupload.swf), (3) dojox/av/resources/audio.swf, and (4) dojox/av/resources/video.swf in the IBM Dojo Toolkit, as used in IBM Social Media A...

CVE-2014-8920
Published: 2015-01-28
Buffer overflow in the Data Transfer Program in IBM i Access 5770-XE1 5R4, 6.1, and 7.1 on Windows allows local users to gain privileges via unspecified vectors.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
If youíre a security professional, youíve probably been asked many questions about the December attack on Sony. On Jan. 21 at 1pm eastern, you can join a special, one-hour Dark Reading Radio discussion devoted to the Sony hack and the issues that may arise from it.