Posts Tagged ssd
SSD users debate hybrid versus all-flash arrays at SNW
Posted by Marc Malotke in Uncategorized on October 17, 2012
Snippet from article
….Amit Patel, IT manager at semiconductor manufacturer Linear Technology, and Brad Taylor, director of technology operations for financial services firm Calypso Technology, said they needed more performance than they could get from spinning disk arrays, but found all-flash arrays too expensive. They both chose Nimble Storage systems that include four shelves for SSDs and 12 for spinning drives, and use the SSDs for cache….
More here….
http://goo.gl/gmhUD
Nimble Storage Bits: What is SSD good at?
Posted by Marc Malotke in Uncategorized on October 15, 2012
SSD drives, though faster than hard drives, are much better at reading data than writing data. When writing data to SSD drives, the one concern is that SSD drives have a specific write life, feel free to google “Write Amplification” for more information.
When reading data
SSD Drives offer better performance
When writing data
Hard Drives offer better performance versus the cost of SSD
There are (2) different ways that data is Read or Written which is (1) Random and (2) Sequential.
Sequential Workloads
Hard drives offer a better combination of capacity and performance versus the cost of SSD.
Random Workloads
SSD drives offer huge performance gains over hard drives with random workloads. Remember that if the random workload is write intensive then the concern with SSD drives are their rated write life.
Here are some examples of applications and how they behave.
Sequential Apps
- Backup
- SQL Server Logs
- Exchange Logs
- Media Streaming
Random Apps
- Database
- Exchange
- File Server
- Server Virtualization
- Desktop Virtualization
