Wannacry Ransomware Alert
... It has been reported that a new ransomware named as "Wannacry" is spreading widely. Wannacry encrypts the files on infected Windows systems. This ransomware spreads by using a vulnerability in implementations of Server Message Block (SMB) in Windows systems. This exploit is named as ETERNALBLUE. The ...
... It has been reported that a new ransomware named as "Wannacry" is spreading widely. Wannacry encrypts the files on infected Windows systems. This ransomware spreads by using a vulnerability in implementations of Server Message Block (SMB) in Windows systems. This exploit is named as ETERNALBLUE. The ...
Networking and the Internet – Glossary
... In Windows, a disk drive or equivalent that is physically attached to a different system to the one requiring to perform I/O operations on it. Network drives can be accessed by the same application programming that is used to access local drives, even when the local system does not contain support f ...
... In Windows, a disk drive or equivalent that is physically attached to a different system to the one requiring to perform I/O operations on it. Network drives can be accessed by the same application programming that is used to access local drives, even when the local system does not contain support f ...
Chapter 10 PowerPoint
... • Consistency semantics specify how multiple users are to access a shared file simultaneously. • Similar to process synchronization algorithms from Chapter 6, but less complex due to slow speed of disk I/O and network latency (for remote file systems). • Unix file system (UFS) implements: – Writes t ...
... • Consistency semantics specify how multiple users are to access a shared file simultaneously. • Similar to process synchronization algorithms from Chapter 6, but less complex due to slow speed of disk I/O and network latency (for remote file systems). • Unix file system (UFS) implements: – Writes t ...
Computer Backup Demo
... After a saveset is made (e.g. to D:), make a copy of it on media that is not physically in the computer (e.g. move it to a networked computer or a USB hard drive). You could write it to a DVD (not recommended) – or to many CDs. Wherever you place it, be sure that a crippled computer (booted from a f ...
... After a saveset is made (e.g. to D:), make a copy of it on media that is not physically in the computer (e.g. move it to a networked computer or a USB hard drive). You could write it to a DVD (not recommended) – or to many CDs. Wherever you place it, be sure that a crippled computer (booted from a f ...
What is moonOS?
... and build top of Free and Open Sources software. moonOS works well on its own without the need for any other operating systems but it also cohabitant well, auto-detects and communicates well with other operating systems. moonOS is available in freedom, that mean people can use it, copy, redistribute ...
... and build top of Free and Open Sources software. moonOS works well on its own without the need for any other operating systems but it also cohabitant well, auto-detects and communicates well with other operating systems. moonOS is available in freedom, that mean people can use it, copy, redistribute ...
A File System for Storage Class Memory
... class memory (SCM). With traditional persistent storage devices, the overhead brought by I/O latency is much higher than that of file system layer itself. So the storage system performance usually depends on the devices’ characteristics and the performance of I/O scheduler. However, if the access la ...
... class memory (SCM). With traditional persistent storage devices, the overhead brought by I/O latency is much higher than that of file system layer itself. So the storage system performance usually depends on the devices’ characteristics and the performance of I/O scheduler. However, if the access la ...
File System in Win In a computer, a file system (sometimes written
... are case-insensitive (i.e., filenames such as FOO and foo refer to the same file); in others, filenames are case-sensitive (i.e., the names FOO and foo refer to two separate files). Most modern file systems allow filenames to contain a wide range of characters from the Unicode character set. Most f ...
... are case-insensitive (i.e., filenames such as FOO and foo refer to the same file); in others, filenames are case-sensitive (i.e., the names FOO and foo refer to two separate files). Most modern file systems allow filenames to contain a wide range of characters from the Unicode character set. Most f ...
File Systems
... – If a disk block was written every time a process executed a write statement the number of writes would increase greatly. ...
... – If a disk block was written every time a process executed a write statement the number of writes would increase greatly. ...
File Systems - The University of Alabama in Huntsville
... • Multiple concurrent accesses are possible. If two I/O operations start at about the same time, serial access is enforced to make sure data is consistent. That is, one operation is performed in its entirety before the next one begins. • However, a read from user 1, followed by a write from user 2, ...
... • Multiple concurrent accesses are possible. If two I/O operations start at about the same time, serial access is enforced to make sure data is consistent. That is, one operation is performed in its entirety before the next one begins. • However, a read from user 1, followed by a write from user 2, ...
Lecture 6 File Systems
... • the number of blocks in the partition • the size of the blocks • a free-block count • free-block pointers ...
... • the number of blocks in the partition • the size of the blocks • a free-block count • free-block pointers ...
File System in Win File system allows users and programs to
... File System Formulas (Types) Below some types of file system: Hierarchical File System (HFS) HFS is a file system type developed by Apple Inc. for use on computers running Mac OS. Two main variants of HFS exist: Mac OS Standard (“HFS Standard” or “HFS”) and Mac OS extended (“HFS extended” or “HFS+” ...
... File System Formulas (Types) Below some types of file system: Hierarchical File System (HFS) HFS is a file system type developed by Apple Inc. for use on computers running Mac OS. Two main variants of HFS exist: Mac OS Standard (“HFS Standard” or “HFS”) and Mac OS extended (“HFS extended” or “HFS+” ...
Locks and Concurrency
... Escalation occurs when SQL Server locks more and more resources to conserve overhead – e.g., you might think you are locking a few rows, but they turn out to be so numerous that SQL Server may lock the page, extent, or even table holding them. Lock Modes – i.e., ways to lock resources o Shared Locks ...
... Escalation occurs when SQL Server locks more and more resources to conserve overhead – e.g., you might think you are locking a few rows, but they turn out to be so numerous that SQL Server may lock the page, extent, or even table holding them. Lock Modes – i.e., ways to lock resources o Shared Locks ...
files
... • The information in files must be persistent – that is not affected by creation/destruction of processes • These files must be managed by the OS • The part of the OS that handles this is called the file system ...
... • The information in files must be persistent – that is not affected by creation/destruction of processes • These files must be managed by the OS • The part of the OS that handles this is called the file system ...
File I/O
... Study Java's I/O with text and binary files Examine role of exceptions in I/O Observe use of files in GUI programs in context of an information retrieval problem Learn about the role of files in database ...
... Study Java's I/O with text and binary files Examine role of exceptions in I/O Observe use of files in GUI programs in context of an information retrieval problem Learn about the role of files in database ...
File-Management
... • OS abstracts from the physical properties of its storage devices to define a logical storage unit called the file • File is a named collection of related information which is recorded on secondary storage. For a user it is the smallest allotment of logical secondary storage ...
... • OS abstracts from the physical properties of its storage devices to define a logical storage unit called the file • File is a named collection of related information which is recorded on secondary storage. For a user it is the smallest allotment of logical secondary storage ...
Document
... How to keep locally cached data up to date / consistent? Client-initiated approach check validity on every access: too much overhead first access to a file (e.g., file open) every fixed time interval Server-initiated approach server records, for each client, the (parts of) files it caches ...
... How to keep locally cached data up to date / consistent? Client-initiated approach check validity on every access: too much overhead first access to a file (e.g., file open) every fixed time interval Server-initiated approach server records, for each client, the (parts of) files it caches ...
The New Data Pump - NOCOUG - Northern California Oracle
... Re-attaching and monitoring a big job The PL/SQL API SQL File import External Table access driver www.caleb.com/dba [email protected] ...
... Re-attaching and monitoring a big job The PL/SQL API SQL File import External Table access driver www.caleb.com/dba [email protected] ...
MODUL 11 Designing Databases(2)
... – A restricted database updates or deletes a key only if there are no matching child records – A cascaded database will delete or update all child records when a parent record is deleted or changed ...
... – A restricted database updates or deletes a key only if there are no matching child records – A cascaded database will delete or update all child records when a parent record is deleted or changed ...
Week_12 - Computing Sciences
... Explain basic UNIX security issues. Describe disk and file system structure. Use backup and restore archival operations on a system. Establish network services. Investigate the structure of the LDAP directory using LDAP commands. ...
... Explain basic UNIX security issues. Describe disk and file system structure. Use backup and restore archival operations on a system. Establish network services. Investigate the structure of the LDAP directory using LDAP commands. ...
ppt - Purdue University :: Computer Science
... By having the programmers being the users themselves of the OS (eat your own food), UNIX became the robust, practical system that we know today. UNIX was written in “C” (95%) and assembly language (5%). This allowed UNIX to be ported to other machines besides Digital Equipment (DEC)’s PDP11. ...
... By having the programmers being the users themselves of the OS (eat your own food), UNIX became the robust, practical system that we know today. UNIX was written in “C” (95%) and assembly language (5%). This allowed UNIX to be ported to other machines besides Digital Equipment (DEC)’s PDP11. ...
File-System Implementation
... procedures support the following operations: searching for a file within a directory reading a set of directory entries ...
... procedures support the following operations: searching for a file within a directory reading a set of directory entries ...
Slides
... % chmod go-rwx biglist This will leave the other permissions unaffected. To give read and write permissions on the file biglist to all, % chmod a+rw biglist ...
... % chmod go-rwx biglist This will leave the other permissions unaffected. To give read and write permissions on the file biglist to all, % chmod a+rw biglist ...
Diapositive 1
... •Saved queries (stored procedures) - organizing and/or manipulating data •Forms – gui interaction with data, event programming •Reports – customized results for printing (~ static forms) •Macros and VB programs for extending functionality ...
... •Saved queries (stored procedures) - organizing and/or manipulating data •Forms – gui interaction with data, event programming •Reports – customized results for printing (~ static forms) •Macros and VB programs for extending functionality ...
SimpleDB Overview - Massachusetts Institute of Technology
... • Because you haven’t implemented insertTuple, you have no way to create data files ...
... • Because you haven’t implemented insertTuple, you have no way to create data files ...