Before I begin to discuss this topic, I would like to give a real example:A couple live in the same house, but they don't communicate with each other, or they don't have any good communication. They only communicate in newsletters when something big happens. Otherwise they are too busy with their own lives, and have no time to disturb (take care of) each other. What will happen over the ages. A setback, a bit of frustration, a superficial anger, an outbreak. Only more communication, fewer disput
Developers, testers are testing your patience?
Author: Sonja ThompsonTranslation: purpleendurer, version 1stTags: developers, testers, Sonja Thompson
After a break, I came back to my desk and found several new emails in my inbox. One of them immediately caught my attention. This is the name of a colleague who was scheduled to test a script I wrote. There are three emails in the inbox that he sent within six minutes. The first email only says "That script cannot work ." According to the postmark,
Test
Program
Let's take a look at the very simple C # program tester. CS below:
1 Using System; 2 3 Static Class Tester 4 { 5 Static Void Main () 6 { 7 Console. writeline ( " CLR: " + Environment. version ); 8 Console. writeline ( " Concat: " + String . Concat ( New Int [] { 12 , 345 })); 9 } 10 }
The actual content of this test program is only one row, that is, 8th
FBD is the Fully-buffer DIMM (full cache module technology), which is a serial transmission technology that can increase memory capacity and transmit bandwidth. is a new memory module and interconnect architecture developed by Intel on the basis of DDR2 and DDR3, It can match the current DDR2 memory chip, and it can match the future DDR3 memory chip. Fb-dimm can greatly increase the system memory bandwidth
The Intel 5500 series Xeon CPU2009 year March launches, everybody in for this series CPU chooses the motherboard to be possible to see the memory support option generally is 2 kinds, one is supports 48G, one kind is 24G, the same server board how can be two kinds of different capacity memory support? The secret is in memory type one is Rdimm, one is Udimm.
Then what is Rdimm? What is Udimm?
Rdimm:registered DIMM (registered Dual in-line Memory modul
Tags: writing col eal http using level main byte ORMThe open source code with LEVELDB also includes some test programs that show that these test programs use some common parts of the code, are easy to write multiple test cases, run automatically, and can generate test reports. Originally this is a simple test framework ah, very practical, implementation is also very beautiful, so write down. An essential process in automated testing is the need to automate test object programs for different inpu
GROUP by statementThe GROUP BY statement is used to combine aggregate functions to group result sets based on one or more columns.
SQL GROUP by syntaxSELECT column_name, aggregate_function (column_name)From table_nameWHERE column_name operator ValueGROUP by column_name
MySQL Tutorial > CREATE TABLE Employee ( -> id nbsp; int, -> first_ name VARCHAR, -> last_name VARCHAR, -> start_date Date, -> end_date date, -> salary FLOAT (8,2), -> city VARCHAR (Ten), -> description VARCHAR (a)
First, be sure to submit!!1. Remember that there is such a flaw, you may encounter later when you will understand the cause of the occurrence.2. Try to find out the cause of the error, such as any special operation, or some operating environment.3. Programmers are more familiar with the program than testers, perhaps you have submitted, even if not re-, the programmer will understand the problem.4. Once again the problem cannot be reproduced, you can call the programmer to see the problem directl
testsExcelTomorrow is tomorrow's testExcelSo there is no consistency5Each problem should be marked with a functional module, a tester, a test version number, a test time, a test operation process, test input data, and an error.6First, test the normal data input, normal operation process, whether all the processes can be passed, whether the data is saved normally, and whether the stored data can be retrieved correctly. Do not perform those critical co
DF View root directory full disk space [[emailprotected] logs]# DF File System 1k-block used available% mount point /dev/sda2 41284928 0 Span style= "FONT-SIZE:14PX;" > 41284928 100%/ tmpfs 1962324 0 1962324 0%/DEV/SHM /dev/sda1 516040 59236 430592 13%/boot /dev/sda5 1542096 35072 1428688 3%/data View space consumption in the root directory, accounting for only 10GConjecture should not free up space after deleting filesUse lsof|grep deletedYou can see the files with a bunch o
sense of awe. Of course, it's only a corner of the mystery, and it all has to wait until the 2007 international Solid State Circuit Conference (held in San Francisco, USA, in February) to fully understand the isscc,2007.
Fb-dimm fire up?
Fb-dimm's high power consumption, high cost and high latency make the technology's popularization encounter unprecedented difficulties. Intel, which has been pushing hard for Fb-
. Although the bandwidth provided by a dual 64-bit memory system is equivalent to the bandwidth provided by a 128-bit memory system, the results are different. The dual-channel system contains two independent, complementary intelligent memory controllers, and in theory, two memory controllers can operate at the same time with 0 delays between them. For example, two memory controllers, one for a and another for B. When controller B is ready for the next access memory, controller A is reading/writ
. Using just plain memory SD memory, DDR memory, the Chipkill memory controller provides storage protection that is conceptually similar to a checksum disk array, where data is written to multiple DIMM memory chips. In this way, each DIMM plays the same role as the storage array. If any one of the chips fails, it affects only one bit of the data byte, because the other bits are stored on another chip. After
Check HP Server Memory status script
Script 1 (send an email notification if any problem occurs ):# Vi disk. ShPress a or I to enter the editing mode.#! /Bin/bashName = 'hostname'Date = 'date + % m % d % y'Num = 'dmidecode | grep-I 'serial number' | head-N 1'Mem = '/sbin/hpasmcli-s "show dimm" | grep status | awk-f [: ""] +' {print $2 }''Mem = '/sbin/hpasmcli-s "show dimm" | grep size | awk-f [: ""] +' {pr
characteristics and different, it is SRAM more suitable as a scratchpad, with CPU fast access to use. DRAMis suitable for use as the primary memory.
Volatile memory and non-volatile memoryVolatile Memorythe difference between volatile memory () and non-volatile memory ( Non-Volatile Memory ) is whether data stored internally can be saved after a power outage. Volatile memory data will disappear with the loss of power supply, while non-volatile memory can still hold internal data.
works in registered mode, when the address signal and control signal on the motherboard reaches the DIMM at the first clock cycle of the data signal. A clock cycle is placed on the register chip and then the rising edge of the next clock signal is output from the register, along with the data signal that arrives at the DIMM from the motherboard at the same time to the SDRAM. When the registered memory work
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