[Translated from mos] Using index quick full scan (index ffs) to avoid full table scan, mosffs
Using index quick full scan (index ffs) to avoid full table Scan
Reference Original:Index Fast Full Scan Usage To Avoid Full Table Scans (Doc ID 70135.1)
Applicable:Oracle Database
Index full scan and index fast full scan look similar to each other. They are both common and personalized. The commonality between the two is that scanning is not required.You can directly return all the required data through the index. This is undoubtedly one of the rare data access methods to improve query performance, because the data stored in the index is usuallyIs much smaller than the original table
How to configure Nessus and Nessus vulnerability scan in the nessus vulnerability scan tutorialHow to configure Nessus In the Nessus vulnerability scan tutorial
After the Nessus tool is successfully installed, you can use it to perform vulnerability scanning. To better use the tool, we will introduce the related settings of the tool, such as service start, softwa
[Translated from mos] SYS_OP_ C2C full table scan (fts)/full index scan, sys_op_c2cfts
SYS_OP_ C2C full table scan (fts)/full index Scan
Reference Original:SYS_OP_ C2C Causing Full Table/Index Scans (Doc ID 732666.1)
Applicable:Oracle Database-Enterprise Edition-Version 10.1.0.2 to 12.1.0.1 [Release 10.1 to 12.1]Inform
Port Scan path:What is a scanner?A scanner automatically detects remote or local host security vulnerabilities.ProgramBy using a scanner, you can discover the distribution of various TCP ports on the remote server and the services provided and their software versions! This allows us to indirectly or intuitively understand the security problems of remote hosts.
Working PrincipleThe scanner collects a lot of useful information about the target host (f
The earlier interview was asked what the scanning use of the Zbar, and then asked why not the original, more efficient ah, saying that just started to achieve, do not seek efficiency, also do not know how to answer. Now in retrospect, the best answer is: Need to scan the album, the original implementation is not AH.Zbar Advantages: You can achieve photo scanning of albums But the efficiency is a little low.Native: High efficiency, but unable to do pho
When we are in the zxing framework to scan the QR code, we will find that now the mobile phone with the resolution of the addition. The scanning box will be smaller, the 1920*1280 and 1280*720 are relatively normal. But Samsung's several mobile phone note4,5. S6, such as several mobile phone resolution up to 2560*1440, even some phones up to 3660 of the bar can't remember.When these phones scan, pop-up
ID scan recognition, mobile ID card OCR scan recognitionFirst, Product descriptionWen Tong ID card scanning recognition system is a platform-based ID scan recognition application developed by our company, which supports Android,iOS, Linux,windows And many other mainstream mobile operating systems. This product uses the mobile phone, the tablet computer camera to
The index unique scan, which is a scan of a unique index, applies only to the target SQL that is the equivalent query in the WHERE condition. Because the scanned object is a unique index, the results of the index uniqueness scan will return at most one record. Empno is primary key in the EMP table, corresponding to a unique index [Email protected]> SELECT * from
The mac uses the masscan scan port. I think the scan effect is between nmap and zmap, And the masscannmap
Address: https://github.com/robertdavidgraham/masscan
Download, decompress, cd, and make. Then, copy the executable file masscan in the bin to/usr/local/bin for convenient calling.
Root permission execution
Masscan-p 80 8/16 ..-oX mas. log
The scan
Use ZBar in iOS to scan the QR code and customize the scan interfaceZXing has been used in Android to identify QR codes. ZXing also has the corresponding iOS version. After understanding it, ZBar is also a common QR code recognition software, the sdks for iOS and Android are provided for use. Finally, I chose ZBar for QR code identification. The annotations are clear and easy to use.ZBar provides two usage
oracle| Index
In oracle9i we know that we can use the Jump Index Scan (index Skip Scan). However, there are some limitations to the use of jumping index scans.
From Oracle's documentation we can find this:
Index Skip Scans
Index skip scans improve index scans by Nonprefix columns.
Often, scanning index blocks is faster than scanning table data blocks.
Skip scanning lets a composite index is split logical
JAVA-Mobile scan two-dimensional code, page response (not scan code login)
I have just been a few months of Meng New, these months, encountered a lot of no contact with the function, although the code is very simple, but also for a while let me worry, thinking impassability.
In order not to let oneself learn a little new things forget, so, began to write my first blog. I hope that the people who help to the
In front, you Xia introduced some knowledge about database vulnerability scanning and launched an "Authorization scan" for Oracle databases. Now we perform a "weak password scan ", because weak passwords are almost the biggest threat to databases, we listed "weak password scanning" in database vulnerability scanning ". The target of this project is still the Oracle database.
As mentioned in the previous art
1. install yuminstall-ylibpcaplibpcap-devel before installation. if The yum tool is not installed, install the following package with rpm [root@oradbaarp-scan-1.8] # yumlist | greplibpcaplibpcap. i386 nbsp 1, which must be installed before installation
Yum install-y libpcap-devel
If the yum tool is not installed
Install the following software package with rpm
[Root @ oradba arp-scan-1.8] # yum list | grep
1, need to install before installationYum install-y libpcap libpcap-develIf the Yum tool is not installedYou need to use RPM to install the following packages[Email protected] arp-scan-1.8]#Yum List|grep libpcapLibpcap.i386 14:0.9.4-15.el5 Installedlibpcap.x86_64 14:0.9.4-15.el5 InstalledLibpcap-devel.i386 14:0.9.4-15.el5 Installedlibpcap-devel.x86_64 14:0.9.4-15.el5 installed2, download packagewget http://www.nta-monitor.com/tools/arp-
Intranet hosts are automatically assigned IP address, sometimes need to look under the IP in use, wrote a simple script.
Linux and Windows can be used, multi-threaded to ping1-255 all addresses, inefficient, about 2 minutes. Just make it and use it.
#-*-coding:utf-8-*-#author: Orangleliu date:2014-11-12 #python2.7.x ip_scaner.py "" different platforms, to achieve IP scanning on the intranet side sometimes need to know where The effective IP of the LAN, but do not want to find specific tools to
Example of the multi-threaded Port Scan function implemented by python: python Port Scan
This example describes the multi-threaded port scanning function implemented by python. We will share this with you for your reference. The details are as follows:
The following program provides Python code for multi-thread scanning of a given ip host.
#!/usr/bin/env python#encoding: utf-8import socket, sys, thread, tim
Scan the QR code to register and scan the logon register.
Scan-code logon is the most popular and convenient logon method. Here I use the public number to demonstrate the QR code logon process.
Required information:
1. AppId and AppSecret of the Public Account
2. Get access_toke with the Public Account
Public function getToken (){$ Access_token = S ("gzh_access_
Concise Port Scan script and concise Port Scan script
Script Name: monitor_port.pl
Purpose: scan for a specific port.
Script:
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#!/usr/bin/envperl($sec,$min,$hour,$mday,$mon,$year)=(localtime)[0..5];($sec,$min,$hour,$mday,$mon,$year)=(sprintf("%02d",$sec),sprintf("%02d",$m
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