Moore’s Law:
The number of transistors on a chip will double about every two years.
What is the law for the Hard disk performance?
How far you trust your hard disk in the server, desktop or laptop? Why do Hard Disks crash and dies? (Not Hard enough) What about the noise which you hear with fear? Droom Broom Vroom ?Is the hard disk searching some data or riding an auto rickshaw on Chennai streets? Why the database pro’s break their heads for tuning the perfect queries.
In the last twenty years, processor speeds have increased at a geometric rate. However, conventional storage access times have only improved marginally. The result is a massive performance gap, felt most painfully by database servers, which typically carry out far more I/O transactions than other systems. Super fast processors and massive amounts of bandwidth are often wasted, as storage devices take several milliseconds just to access the requested data. When servers wait on storage, users wait on servers. This is I/O wait time.
This is a problem which we are living with ………..More than a problem………..
The solution is SSD - Solid State Disk
Solid state disk (or SSD) is any storage device that does not rely on mechanical parts to input and output data. SSD refers to storage devices that use memory (DDR or Flash) as the primary storage media. The difference is that the storage medium is not magnetic This provides faster access time than a hard disk, because the SSD data can be randomly accessed in the same time whatever the storage location. The SSD access time does not depend on a read/write interface head synchronizing with a data sector on a rotating disk. The SSD also provides greater physical resilience to physical vibration, shock and extreme temperature fluctuations. The SSDs also consume less power and saves the data and earth at the same time.
Solid state disks are designed to solve the problem of I/O wait time by offering 250x faster access times (.02 milliseconds instead of 5) and 80x more I/O transactions per second (400,000 instead of 5000) than RAID.1
The only downside is a higher cost per megabyte of storage - although in some applications the higher reliability of SSDs makes them cheaper to own than replacing multiple failing hard disks. The steep price is a factor, which has made the SSD not able to enter easily into many markets. In 1983 over 90% of corporate didn't have a budget for buying IBM PCs.Similarly RAID systems did not appear in most 1990 corporate IT budgets - but are now everywhere .The price of SSDs are coming down fast. This year Toshiba, Fujitsu, Samsung and HP have released laptops with SSD. There are lots of Oracle, SQL Server, and Sybase system running already with SSDs.
Check out these HOT laptops with SSD
Appli Air BOOK - http://www.apple.com/macbookair/features.html
INSIDE APPLE AIR Toshiba Laptops - http://laptops.toshiba.com/research-center/technology-guides/ssd
