The following example connects user scott with password tiger to a database with SID orcl through port 1521 of host myhost, using the Thin driver.
Connection conn = DriverManager.getConnection
("jdbc:oracle:thin:@myhost:1521:orcl", "scott", "tiger")
If you have 10,000 front-end users, having a connection pool of 10,000 would be shear insanity. 1000 still horrible. Even 100 connections, overkill. You want a small pool of a few dozen connections at most, and you want the rest of the application threads blocked on the pool awaiting connections.
imagine three threads (Tn=3), each of which requires four connections to perform some task (Cm=4). The pool size required to ensure that deadlock is never possible is:
pool size = 3 x (4 - 1) + 1 = 10
// Set up the environment for creating the initial context Hashtable<String, Object> env = new Hashtable<String, Object>(); env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory"); env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial"); // Authenticate as S. User and password "mysecret" env.put(Context.SECURITY_AUTHENTICATION, "simple"); env.put(Context.SECURITY_PRINCIPAL, "cn=S. User, ou=NewHires, o=JNDITutorial"); env.put(Context.SECURITY_CREDENTIALS, "mysecret"); // Create the initial context DirContext ctx = new InitialDirContext(env); // ... do something useful with ctx
Auf der CES streamt Ericsson eine MP3-Datei durch den menschlichen Körper. Der Prototyp, der über kapazitive Kopplung funktioniert, soll eine Übertragungsrate von 6 Mbit/s erreichen.
mod_choke is has module for Apache that limits use by greedy customers. It' S two hand functions competitor are to limit the number of connections per IP, and to limit the misses At which apache sends dated to the customer.
"Use The Network To Find An Expert Or Locate Implicit Knowledge Only a fraction of an organization’s "knowledge" exists in databases. Another fraction exists in the form of explicit documents and reports that may be found on an organizational intranet
"Use The Network To Find An Expert Or Locate Implicit Knowledge Only a fraction of an organization’s "knowledge" exists in databases. Another fraction exists in the form of explicit documents and reports that may be found on an organizational intranet
H. Lee, H. Kwon, und H. Hwang. Speech, Image Processing and Neural Networks, 1994. Proceedings,
ISSIPNN '94., 1994 International Symposium on, 2, Seite 405--408. IEEE Computer Society, (1994)