PPT-Disk storage Index structures for files

Lecture 12 Disk Storage Devices Basic unit of data stored in disks is a single bit to represent data in 01 form Bits are grouped into Byte The capacity of disk the amount of bytes it can store. Extra . Slides. BeStMan. Features. Multiple disk partition support. Default space management for files with lifetime. Allocation of space, garbage collection. Dynamic space reservation. Support for multiple file transfer servers. Anjo. . Vahldiek-Oberwagner. 1. , . Eslam. . Elnikety. 1. , . Aastha. Mehta. 1. , . Deepak . Garg. 1. , Peter Druschel. 1. , . Rodrigo Rodrigues. 2. , . Johannes . Gehrke. 3,4. , . Ansley . Post. 5. Prof. Steven A. Demurjian, Sr. . Computer Science & Engineering Department. The University of Connecticut. 191 Auditorium Road, Box U-155. Storrs, CT 06269-3155. steve@engr.uconn.edu. http://www.engr.uconn.edu/~steve. Luca Canali, CERN IT. A Closer Look inside Oracle ASM. Outline. Oracle ASM for DBAs. Introduction and motivations . ASM is not a black box . Investigation of ASM internals. Focus on practical methods and troubleshooting. Index structures for files. Lecture 12. Disk Storage Devices. Basic unit of data stored in disks is a single . bit . to represent data in 0/1 form.. Bits . are grouped into . Byte.. The capacity of disk: the amount of bytes it can store.. Main Points. File systems. Useful abstractions on top of physical devices. Storage hardware characteristics. Disks and flash memory. File system usage patterns. File Systems. Abstraction on top of persistent storage. Chris Wood. Director of Product Management, Axiom LOB. A simplified History of Sun/Oracle Storage. In 1999 Sun acquired . MaxStrat. (and me in the process) to get it’s first real RAID array. The famous (infamous) T3. (Project Purple). Index structures for files. Lecture 12. Disk Storage Devices. Basic unit of data stored in disks is a single . bit . to represent data in 0/1 form.. Bits . are grouped into . Byte.. The capacity of disk: the amount of bytes it can store.. 16.1 Introduction. Databases typically stored on magnetic disks. Accessed using physical database file structures. Storage hierarchy. Primary storage. CPU main memory, cache memory. Secondary storage. Storage systems outside of “primary memory”. Cannot access data using load/store instructions. Characteristics. Large: Terabytes. Cheap: few cents / GB. Persistent: data survives power loss. Slow: 100us – 10ms to access . 1. Section 6: . SQL Server on IaaS . Best Practices. Different Considerations for SQL Server on Azure VM. Sizing considerations. Storage and IO considerations. Network considerations. Application considerations. Storage. The zeros and ones in the input devices, output devices and process devices are in electronic form and are lost when the computer is turned off.. To preserve the zeros and ones when the computer is turned off they must be sent to storage devices. Storage. The zeros and ones in the input devices, output devices and process devices are in electronic form and are lost when the computer is turned off.. To preserve the zeros and ones when the computer is turned off they must be sent to storage devices. Features. Multiple disk partition support. Default space management for files with lifetime. Allocation of space, garbage collection. Dynamic space reservation. Support for multiple file transfer servers.