News
6/22/2010
02:56 PM
George Crump
George Crump
Commentary
50%
50%

The Cache Value of SSD

When I speak with IT Managers about Solid State Disk (SSD) one of the most common questions is how and where should it be implemented? There are many options but an extremely simple risk free way to get started is using SSD as a large cache in front of a disk array.

When I speak with IT Managers about Solid State Disk (SSD) one of the most common questions is how and where should it be implemented? There are many options but an extremely simple risk free way to get started is using SSD as a large cache in front of a disk array.Most disk arrays or RAID controllers have some cache on them already to help with performance, but in comparison to SSD these are relatively small. With SSD the memory available to cache can expand to 64GB or more. This makes the likelihood of a cache miss significantly lower. Also Flash SSD, which now dominates the market, is best suited for read heavy operations which in most cases a cache is. Using SSD as a cache first is also ideal for the risk adverse. Since all the data eventually lands back on the mechanical drive based array there is limited concern over what to do if the SSD fails.

The big advantage to using SSD as cache is that there is limited if any changes that need to be made to the application or the processes that protect that application. When SSD is used as a stand alone tier, care must be taken to make sure the application knows how to use that tier and changes or additions need to be made to the data protection process so that data on the SSD tier is protected. SSD cache is managed by the controller or caching device, the application and associated protection processes function normally.

SSD cache implementations can come in several forms. There are array controllers that have changed their controller software to support an SSD device and there are stand alone caching appliances designed to sit in front of NAS or SAN based mechanical drive based arrays. All have their role to play and we will explore them in more detail in our next entry. For more information on SSD, please see our SSD resources page.

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 December Tech Digest
Experts weigh in on the pros and cons of end-user security training.
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-2014-8551
Published: 2014-11-26
The WinCC server in Siemens SIMATIC WinCC 7.0 through SP3, 7.2 before Update 9, and 7.3 before Update 2; SIMATIC PCS 7 7.1 through SP4, 8.0 through SP2, and 8.1; and TIA Portal 13 before Update 6 allows remote attackers to execute arbitrary code via crafted packets.

CVE-2014-8552
Published: 2014-11-26
The WinCC server in Siemens SIMATIC WinCC 7.0 through SP3, 7.2 before Update 9, and 7.3 before Update 2; SIMATIC PCS 7 7.1 through SP4, 8.0 through SP2, and 8.1; and TIA Portal 13 before Update 6 allows remote attackers to read arbitrary files via crafted packets.

CVE-2014-1421
Published: 2014-11-25
mountall 1.54, as used in Ubuntu 14.10, does not properly handle the umask when using the mount utility, which allows local users to bypass intended access restrictions via unspecified vectors.

CVE-2014-3605
Published: 2014-11-25
** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2014-6407. Reason: This candidate is a reservation duplicate of CVE-2014-6407. Notes: All CVE users should reference CVE-2014-6407 instead of this candidate. All references and descriptions in this candidate have been removed to pre...

CVE-2014-6093
Published: 2014-11-25
Cross-site scripting (XSS) vulnerability in IBM WebSphere Portal 7.0.x before 7.0.0.2 CF29, 8.0.x through 8.0.0.1 CF14, and 8.5.x before 8.5.0 CF02 allows remote authenticated users to inject arbitrary web script or HTML via a crafted URL.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Now that the holiday season is about to begin both online and in stores, will this be yet another season of nonstop gifting to cybercriminals?