unix linux data storage using the ext2 file system

... select File Manager from the main menu The next section briefly explains the operation of the file manager 6.5.4 Using the File Manager Like the Microsoft Windows Explorer, the file manager window ... that the Xsession file doesn't exist, simply ignore the error Next, using ae or another text editor of your choice, edit your Xsession file to contain these lines at the beginning of the file: ... double clicking the icon with the left mouse button launches the file manager, which displays the contents of the user's home directory 6.5.3.2 Desktop The desktop is the empty area of the display,...

Ngày tải lên: 07/11/2013, 10:15

... opened, and the ExecuteReader method is called After the list has been cleared, the DataReader is iterated through, and the ListBox control is loaded Comments The DataReader object is one of the most ... object in the single statement This is new to NET and is extremely useful How It Works When the user clicks the btnLoadList button, the Command object is assigned the necessary properties, the connection ... TextBox Notice that the list box does not have the DataBindings properties set That is because you will be using the ListBox control unbound Look at Figure 3.3 to see what the form should look...

Ngày tải lên: 14/12/2013, 20:16

... Mounts, and File Systems The /proc file system also contains information about the disk drives present in the system and the file systems mounted from them 7.5.1 File Systems The /proc/filesystems ... special file systems such as the /proc file system, this is none The second element is the mount point, the place in the root file system at which the file system contents appear For the root file system ... contents of /proc/filesystems list only file system types that either are statically linked into the kernel or are currently loaded Other file system types may be available on the system as modules...

Ngày tải lên: 26/01/2014, 07:20

... identifying entity type  Entities are identified by the combination of: – A partial key of the weak entity type – The particular entity they are related to in the identifying entity type Example: Suppose ... their name, sex, birthdate, and relationship to employee ER Model Concepts  Entities and Attributes – Entities are specific objects or things in the mini-world that are represented in the database ... Smith works on the ProductX PROJECT or EMPLOYEE Franklin Wong manages the Research DEPARTMENT  Relationships of the same type are grouped or typed into a relationship type For example, the WORKS_ON...

Ngày tải lên: 12/05/2014, 11:55

... provides data integrity By signing the certificate, it is later possible to authenticate the data contained in the certificate (i.e., the public key) To authentiate a certificate, the knowledge of the ... know the address to the “root” servers The “root” servers are the servers located at the top of the DNS tree.2 The client sends a query for www.nada.kth.se to the root server, and usually the ... stored in DNS The digital signature is sent together with the data, and the remote system retrieves the public key from DNS and verifies the signature This specification is as part of the Secure DNS...

Ngày tải lên: 14/02/2014, 08:20

... is given The section first presents an overview of the model system, and then a description of the individual modules in the system 2.1 Overview of the EVA model The concept of the EVA system is ... verification of the EVA system 3.2 Results from the individual scenarios using the EVA model system In this section, the results from the individual scenarios defined in the previous section using the EVA ... externalities at the national level The essential idea behind the EVA system is that state-of -the- art methods are used in all the individual parts of the impact-pathway chain Other comparable systems...

Ngày tải lên: 29/03/2014, 14:20

... Awareness Is The Solution A group at Berkeley decided to build a better, faster file system, which they cleverly called the Fast File System (FFS) The idea was to design the file system structures ... what they did FFS thus ushered in a new era of file system research; by keeping the same interface to the file system (the same APIs, including open(), read(), write(), close(), and other file system ... access the file system by using one of the others) Within each group, we need to track whether the inodes and data blocks of the group are allocated A per-group inode bitmap (ib) and data bitmap...

Ngày tải lên: 16/08/2016, 18:50

... Vice), which would then traverse the pathname, find the desired file, and ship the entire file back to the client The client-side code would then cache the file on the local disk of the client (by ... the entire file on the server last and thus will be the “winning” file, i.e., the file that remains on the server for others to see The result is a file that was generated in its entirety either ... TestAuth GetFileStat Fetch Store SetFileStat ListDir Test whether a file has changed (used to validate cached entries) Get the stat info for a file Fetch the contents of file Store this file on the server...

Ngày tải lên: 16/08/2016, 19:11

... loaded, then the odaRegions DataAdapter fills the data table called dtRegions dtRegions is set as the data source for repRegions, and DataBind method is called, binding the Repeater to the data ... DataBinder.Eval(Container, "DataItem.RegionURL") %>' ID="HyperLink1"/> As the name implies, the DataBinder supplies data from the data source that is specified for the Repeater object You will see how to bind the Repeater ... code takes the Text property of the button, which is the RegionID, and uses it in the SQL string to supply the odaTer data adapter Next, odaTer fills dtTer, which is then used as the data source...

Ngày tải lên: 14/12/2013, 20:16

Ngày tải lên: 14/12/2013, 20:16

... used with Linux UNIX and Linux both rely on the X Window system to display the GUI The X Window system is software that works with the system hardware and graphical applications including the window ... with other window managers There are many aspects of the window manager that can be configured here For now, click on the Theme Manager icon under the Look and Feel menu and then select the Eclipse ... corner of the screen A menu will open Find the system menu, and drag the mouse up to it Once the mouse has been left there for a moment, a submenu will open up Move the mouse up to the KDE Control...

Ngày tải lên: 21/12/2013, 19:15

... troubleshooting tasks using the vi Editor The availability and operation of vi Editor is consistent across all UNIX/ Linux platforms Use the diagram of the sample Class File System directory tree ... _ The new file should be saved in the practice directory on the hard disk Display a long listing of this directory to verify that the file is there How many bytes are in the file? ... vi Editor The vi Editor is started from the command line Whenever invoking vi Editor, the user is opening a file The name of the file to be created or edited can be specified when the user starts...

Ngày tải lên: 21/12/2013, 19:15

... on the right, enter the Name of the form as MyDataForm.cs, and click Open (see Figure 6.18) You'll then see the welcome page for the Data Form Wizard Figure 6.18: Adding a data form using the Data ... Choosing the data connection Click the Next button to continue You now log in to the database by specifying the password for the database user You used the sa user when creating the database ... creating a new DataSet Enter myDataSet as the name for your DataSet, as shown in Figure 6.19 Figure 6.19: Entering the name of the new DataSet Click the Next button to go to the next step You...

Ngày tải lên: 24/12/2013, 01:17

... set the data binding for a control, you select the control in the form designer and expand the DataBindings properties in the Properties window You'll see these properties in the Data area of the ... column in a DataSet object, the value for that column is displayed in the control through the Text property in the DataBindings group The Text property in the DataBindings group sets the text displayed ... that the top part of the form shows the details for the row from the Customers table where the CustomerID is ALFKI; the bottom part of the form contains a DataGrid control that displays the rows...

Ngày tải lên: 24/12/2013, 01:17

... SQL Server using the OLE DB NET data provider The chapter is returned as a field in the data reader with a data type of Object that is a DataReader Hierarchical result sets combine the results ... can use to access parent/child data and associated summary data The connection string using data shaping is shown here: Provider=MSDataShape ;Data Provider=SQLOLEDB ;Data Source=(local); Initial ... DataReader for the Order Detail from the // IDataReader interface column OleDbDataReader orderDetailDR = (OleDbDataReader)orderDR.GetValue(colOrder); // Iterate over records in the Order Detail DataReader...

Ngày tải lên: 24/12/2013, 05:15

... object The Session variables are then updated, with the IsAdding item set to True Lastly, the EditItemIndex of dgLookupData is then set, and the DataGrid bound to the data table using the BindTheGrid ... exists, then this is a round trip, and you don't need to reload the data from the server If it doesn't exist, then the Region table Schema is supplied using the FillSchema method, and then the DataTable ... Returns the number of rows that are currently in the DataTable object DataTable Creates a new DataRow object NewRow DataTable.Rows Add Adds the DataRow object to the DataTable object DataTable...

Ngày tải lên: 21/01/2014, 12:20

... interop can open a Data Link Properties dialog box allowing a user to select an OLE DB provider and set its properties You can use the results programmatically to construct the connection string...

Ngày tải lên: 26/01/2014, 10:20

... After completing this lesson, you should be able to the following: • Compare and evaluate the different storage structures • Examine different data access methods • Implement different partitioning ... statements Using parallel queries to load or for SELECT statements Copyright © Oracle Corporation, 2002 All rights reserved Data Access Methods To enhance performance, you can use the following data ... (PARTITION P1 VALUES LESS THAN (4) TABLESPACE data0 , PARTITION P2 VALUES LESS THAN (8) TABLESPACE data1 , … PARTITION P13 VALUES LESS THAN (53)TABLESPACE data1 2 ); The partition key is week_no VALUES LESS...

Ngày tải lên: 06/03/2014, 17:20

... điều hành Unix/ Linux • Ví dụ – Bàn phím file đầu vào (input file) – Màn hình file đầu (output file) – Máy in file đầu Bộ môn Mạng & Truyền Hệ điều hành Unix/ Linux CÂY THƯ MỤC TRONG UNIX Bộ môn ... • • • • • • File bình thường File thư mục (directory file) File đặc biệt File socket File liên kết Khối thiết bị ngoại vi File dạng ống dẫn Bộ môn Mạng & Truyền CÁC KIỂU FILE TRONG UNIX (tiếp) ... hành Unix/ Linux CÁC KIỂU FILE TRONG UNIX • Để hiển thị kiểu file ta sử dụng lệnh $ls –l sau sử dụng ký tự dòng để nhận biết Bộ môn Mạng & Truyền Hệ điều hành Unix/ Linux CÁC KIỂU FILE TRONG UNIX...

Ngày tải lên: 08/05/2014, 14:53

... the US is paying to generate all these data - probably the majority of genomics data is coming from the US at Page of present - but where it’s not prepared to meet the cost of archiving the data ... format, then moved to back-up storage, before finally being deleted RK: If there is a good chance that the data are going to be used by others, then yes, there is a good case for storing them Just ... storing the raw data for the sake of it, however, is probably not worth it Higher-level data can sometimes be more useful MG: I strongly feel that the data should be archived A lot of the genomics...

Ngày tải lên: 09/08/2014, 22:23