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Networked storage technology: HYPERSCSI vs ISCSI

Data Transfer Protocol iSCSI has become one of the industry's recognized Low-cost storage network solutions, but it is not the only solution, another transport protocol: HYPERSCSI can also provide Low-cost, Ethernet based SAN Solutions. The HYPERSCSI protocol, first developed by the Singapore Data Storage Institute (DSI) in 2000, was designed to transmit SCSI data and instructions via raw Ethernet. It allows users to remotely use SCSI or SCSI based d

NVIDIA Jetson Tx1 (1)

Dedicated programmable audio processor (ARM Cortex A9 with neon, operating frequency up to 844MHz), digital audio Reverb: 10-in/5-out (up to 8 channels per stream), 3 x I2S stereo I/O;PDM receiver: 3x (stereo) or 6x single channel. Display Controller Subsystem Two independent display controllers support DSi VESA Connection compression (VESA, DSC), HDMI, EDP Mipi-

Implementing a database connection pool using dynamic proxies in Java

bound and throws the exception * @throws ClassNotFoundException cannot find the driver class in the connection pool configuration @throws Illegalaccessexception driver class in connection pool configuration * @throws instantiationexception Unable to instantiate driver class * @throws SqlException cannot connect to the specified database properly */ public static DataSource rebind (String name, Connectionparam param) throws Namealreadyboundexception, Classnotfoundexception,illegalaccessexception

K-means algorithm in my eyes

data samples). Random initialization will meet the following scenarios1 Good things.    This is best because the three cluster centers are well spread over three main sample classes, and the following algorithms can be used to form the classification we want.2    This situation is not very good, the red dot and green Point are allocated in the beginning, so the opening will have a confrontation, for bad initialization may produce the following clustering results    This situation is very bad, d

Raspberry Pie Development Series Tutorials 1--Raspberry Pie Introduction __ Boutique articles Reproduced

, the type of raspberry pie Type A: 1 USB, no wired network interface, Power 2.5w,500ma, 256MB RAM (basically not seen) Type B: 2 USB, support wired network, Power 3.5w,700ma, 512MB RAM, 26 gpio (there are a lot of market). B + Type: 4 USB ports, support wired network, power consumption 1w,512m RAM 40 Gpio (2014 new, recommended) Purchase please search on Taobao, very much: 200 to-300 yuan (bare board, excluding SD card, power) 3, Raspberry pie parameters: Type B: Processor Bro

C + + function call procedure--function stack (i) __jquery

(Counter) registers, commonly used as a counter in string and loop operations EDX: Data registers, Commonly used in multiplication and division and I/O pointers ESI: source Change Register DSI: Destination register ESP: stack pointer register, pointing to Stack top EBP: base pointer register, pointing to the bottom of the current stack EIP: instruction register, pointing to the address of the next instruction function call Process Press Stack example

The use of JS closures

external cannot reference the variable inside it,So it will be released soon after execution, and the key is that this mechanism will not pollute the global object.2 Cache To take another example, imagine that we have a function object that is time-consuming to process, and each call takes a long time,Then we need to store the computed values, and when we call this function, we first look in the cache, and if we can't find it, we do the calculation.It then updates the cache and returns the val

Web site Web Standard test

manual 3. Prepare the debugging environment Browser to debug Web Standard pages Mozilla Firefox Safe, simple, compact, free, and support Web standards are features of this new browser. Firefox is a compact version of the Mozilla browser that is very fast and does not contain any additional components, such as e-mail, editors, and so on. Based on the Gecko engine, very small, only 4.72Mb, far less than IE, support for Chinese is also good. Won the maximum PC "2004 Software Award" First prize

Automated Test Learning (v) Selenium command positioning page elements

name features. 4. XPath positioning XPath is a language that locates elements in an XML document. Because HTML can be seen as an implementation of XML, selenium users use this powerful language to locate elements in a Web application. XPath extends the above ID and name positioning methods, offering a number of possibilities, such as locating the third multiple-marquee on the page. XPATH=/HTML/BODY/FORM[1]//absolute path (any minor changes in HTML will result in failure) Form[1] The third

A brief introduction to Shared pool pool and result set caching technology

a subpool, and the request to the next subpool---too small subpool fragmentation problem may be more serious--ora-4031 more likely to occur. Too much subpool can also lead to higher management coordination costs. For example, the following error is related to Subpool: ora-04031:unable to allocate 4216 bytes of shared memory ("Shared Pool", "Unknown Object", "SGA Heap (2,0)", "Library cache") Shared Pool Size judgment LRU chain table is divided into two: transient LRU (instantaneous LRU),

Continuous tracking for PTE Read Access is not set

bytesbus:primary=04, secondary=05, subordinate=05, sec-latency=32I/O behind bridge:0000c000-0000cfffMemory behind BRIDGE:F7800000-F78FFFFFSecondary status:66mhz+ fastb2b-parerr-devsel=fast >tabort-bridgectl:parity-serr-noisa-vga-mabort->reset-fastb2b-pridisctmr-secdisctmr-disctmrstat-disctmrserren-Capabilities: [MSI:ENABLE-COUNT=1/1] maskable-64bit+address:0000000000000000 data:0000Capabilities: [+] Power Management version 3flags:pmeclk-dsi+ d1+ d2+

Teach you how to create a keyword matching project (search engine) ---- 20th days, teach you how to do 20th days

Start Point: Teach you how to create a keyword matching project (search engine) ---- Day 1 Review: Experts teach you how to perform keyword matching projects (search engines)-19th days He wrote the first version of the word segmentation algorithm. He was asked to rewrite it when he showed it to the boss. The reasons are as follows: 1. How to test and test data? 2. Does Splitter do too many things? 3. What should I do if there are repeated phrases like xxl

Dockone WeChat Share (109): The containerized path of small and medium-sized teams

query aspect provides a set of DSL namely PROMQL, supports the filtering of any dimension, the filtering rule supports the regular expression formula. Even we can use a variety of functions, the indicator of the rate, sum, rounding and other operations. Prometheus's query function is very powerful, itself also has a simple UI, not as a monitoring system of the presentation layer is too weak. At the same time, we also need to aggregate each system fragmented monitoring information, so that when

Framework Development (v)----Auto-load class

, spl_auto_load directly manipulate the pointer, so after this __autoload will not be used. Spl_auto_load priority is higher than __autoload.Three pseudo codeIn order to be lazy, design automatic loading function, take suffix name model,action,class, represent the database operation class respectively, respond to the operation class of foreground, third party introduce Lib classFour implementationsMethod is put in common.php.  1 /**2 * @ Auto load function Use3 * @ Various model functions, Class

Selenium IDE (v) Positioning page elements of the Selenium command

']/input[4]//id is the ' loingform ' form and locates its fourth INPUT element.Extended reading:The recommendation:http://www.w3.org/tr/xpath/XPathXPath tutorial:http://www.zvon.org/xxl/xpathtutorial/general/examples.htmlhttp://www.w3.org/TR/xpath/The Firefox plugin can help you get the XPath for the page element:XPath Checker Firebug5. Positioning via hyperlinksYou can locate the hyperlink by connecting the text, and if the two linked text is the sa

"PMP September exam sharing activity" score share, 51 good gift to send no Stop ~

particularly material, summed up in place, very insightful; at the same time, it is worth learning younger brother, learn the younger sister to refer to study, and attach related pictures to explain, may run high-quality articles Oh ~Activity two: The performance of the giftValue 80 yuan 51CTO custom t-shirt one piece! Or a nap with a pillow ~ (optional one)Attached picture of the gift ~ ~T-shirt-size: l/xl/xxl yardsNAP PillowThe above activity inter

Try web-harvest

, and web-harvest has already set upThe alternative extraction model, how to solve the lossless XML Conversion for a large number of non-standard webpages, will be whether this tool can be used in practiceKey Link.In addition, due to my limited level, I have not found any gibberish webpage while using web-harvest to extract Chinese webpages.The purpose of this article is to attract more attention to the Web-harvest tool. Because web-harvestThere are still many advanced applications that I have n

XPath learning: Axis (10) -- following

XPath is a language used to search for information in XML documents. XPath can be used to traverse elements and attributes in XML documents. XPath is the main element of W3C XSLT standards, and XQuery and XPointer are also built on XPath expressions. We recommend a pretty good site: there are good examples in the http://www.zvon.org/xxl/XPathTutorial/General_chi/examples.html, the red font in the following example represents the elements (or attribute

XPath learning: Axis (5) -- descendant-or-self

XPath is a language used to search for information in XML documents. XPath can be used to traverse elements and attributes in XML documents. XPath is the main element of W3C XSLT standards, and XQuery and XPointer are also built on XPath expressions. We recommend a pretty good site: there are good examples in the http://www.zvon.org/xxl/XPathTutorial/General_chi/examples.html, the red font in the following example represents the elements (or attribute

XPath learning: Axis (3) -- descendant

XPath is a language used to search for information in XML documents. XPath can be used to traverse elements and attributes in XML documents. XPath is the main element of W3C XSLT standards, and XQuery and XPointer are also built on XPath expressions. We recommend a pretty good site: there are good examples in the http://www.zvon.org/xxl/XPathTutorial/General_chi/examples.html, the red font in the following example represents the elements (or attribute

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