how to calculate downtime

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How to calculate your broadband speed?

The so-called broadband is strictly speaking, it is able to meet the perception of the various media can feel the bandwidth needed to transmit the network, so it is also a dynamic, development concept. A relatively wide band. In digital communication, it is usually referred to as the bandwidth that transmits 2mbit/s signals above. Broadband Internet is the speed of broadband network, the higher the speed of your broadband, so download and upload the relative increase in the rate, so whether you

Reproduced SQL statement to calculate the qps,tps,iops performance of MySQL database

/$TIME _diff]Echo-n "trans_s: $TRANS _persecond; io_s: $IOREQ _persecond "Fielif [$NUM _parm = 4];thenParm1=$1Parm2=$2Parm3=$3Parm4=$4Up_timeup_time1= $UP _timeSelcomselect_num1= $SELECT _numTrans_numsum_tran1= $SUM _tranIonumsum_io1= $SUM _ioSleep 1parm1=$[$PARM 1-1]While [$PARM 1-GT 0]DoSelcomTrans_numIonumparm1=$[$PARM 1-1]Sleep 1Doneselect_num2= $SELECT _numsum_tran2= $SUM _transum_io2= $SUM _ioUp_timeup_time2= $UP _timeselect_diff=$[$SELECT _num2-$SELECT _NUM1]trans_diff=$[$SUM _tran2-$SUM

Suzhou Urban Brain SQL statement--Calculate the travel share rate of a bus in an area

(RQ,SJD, "xx"), "Yyyymmddhhmiss")) in (5,6) and then "nonworking days"Else "Working days"End as LX,"All day" as SJDFrom Csdnsz_mda_prod.qy_od_5min) a group by RQ,LX,SJD,BH,QYLX) C GROUP by RQ,LX,SJD,BH,QYLX) a join(Select Rq,lx,sjd,bh,qylx,round (avg (RS), 3) as JCRs from (Select substr (rq,1,6) as Rq,lx,sjd,bh,qylx,sum (RS) as RS from (Select Rq,size as Qylx,bh,rs,Case when Weekday (To_date (Concat (RQ,SJD, "xx"), "Yyyymmddhhmiss")) in (5,6) and then "nonworking days"Else "Working days"End as

How to calculate multiplication in Excel

1 how to calculate multiplication in Excel Click in the cell where you want the result to appear, and enter = Enter the cell to be evaluated For example: Enter in C3 = And then enter A3*B3 Shun C3 down the lower right corner. Multiplication--Calculates the product function of all parameters product (), each number in parentheses is separated by commas, and the number of digits must not exceed 30. As mentioned above, you can edit the formula in

Calculate the playback time of an audio frame (audio stream audio frame)

controlled within 23.22 milliseconds. Background knowledge: (An AAC original frame contains 1024 samples and related data over a period of time) according to the AAC document Analysis: 1 AAC Playback time of the audio frame = number of samples/sample frequency (in s) for the corresponding sample of an AAC frame A frame of 1024 sample. Sample Rate Samplerate 44100KHz, 44,100 samples per second, So according to the formula playback time of audio frames = number of sampled samples per AAC frame/Sa

Sqlsever base DateDiff Calculate two time difference how many years

Town Field Poem:——— Dream who feel, the water month Build blog. Baiqian tribulation, only know the vicissitudes of the world.——— today holds the Buddhist language, the technology is boundless willing to learn. Willing to do what you learn, cast a conscience blog.——————————————————————————————————————————1 Code1 --View the current time for easy comparison2 Select getdate()3 Select DateDiff( Year,'1996-11-01',getdate())4 Select DateDiff( Year,'1996-11-03',getdate())2 Show——————————————————————————

Mysql takes the specified latitude and longitude to calculate the distance from the database.

The formula is as follows, Unit meter: 1th Latitude: lng1 lat1 2nd latitude and Longitude: lng2 lat2round (6378.138*2*asin (Pow ((sqrt () LAT1*PI (180)/2), 2) + Cos (LAT1*PI ()/180) *cos (Lat2*pi ()/180) *pow (Sin ((Lng1*pi ()/180-lng2*pi ()/180)/2), 2))) *1000) Example: SELECT store_id,lng , Lat,round (6378.138*2*asin (SQRT (POW (22.299439*pi ()/180-lat*pi (/180)/2), 2) +cos (22.299439*pi ()/180) *cos ( Lat*pi ()/180) *pow (SIN ((114.173881*pi ()/180-lng*pi ()/180)/2), 2))) *1000) as Julifrom S

Calculate the day of the week

How to calculate the day of the week?Slowtiger published on 2009-11-19 08:42:00How to calculate the day of the week?--Caille (Zeller) formulaWhat is the day of the week in history? What day of the future is the week? With regard to this problem, there are many computational formulae (two general formulas and some piecewise formulas), the most famous of which is the Caille (Zeller) formula. namely w=y+[y/4]+

Calculate the number of occurrences of 1 in 10 billion (not limited to 10 billion and 1)

I used to take a written test. One of the questions in the test was to calculate the number of times that 1 appeared within 40 billion. At that time, I only gave the idea. The specific implementation was not written. Now I will list the specific implementation code. The following code can only calculate the number less than the N power of 10, instead of the x * 10 ^ N power. To expand the calculation, we al

[MSSQL] share an SQL server script to calculate the data volume of each table in the database and

Share an SQLSERVER script (calculate the data volume of each table in the database and the space occupied by each row of Records) in many cases, we need to calculate the data volume of each table in the database and the space occupied by each record. Here we share a script CREATETABLE # tablespaceinfo (nameinfoVARCHAR (500), rowsinfoBIGINT, reserved Share an SQLSERVER script (

Calculate the MD5 value of a file in Centos

Script Function The script is written in Perl to calculate the MD5 value of the file. Script usage After installing the operating system, the server calculates the MD5 values of all the binary files in the PATH variable, calculates the MD5 values of a single file, and computes a directory (including subdirectories) the MD5 values of all files are recorded in the file, and a new copy is generated later. Then, two files are compared to determine whether

Algorithm series (19) Using astronomical method to calculate Sun Moon (Crescent)

The synodic of the Chinese lunar calendar is the basis of lunar calendars, and synodic is strictly to the sun and Moon, the day of the beginning of the month as the first, so the moon and sun time calculation is the key to make the lunar calendar. This paper will introduce the theory of ELP-2000/82 Moon operation and how to calculate the time of sun and moon with Elp-2000/82 Moon Operation theory. To calculate

Calculate the number of occurrences of 1 in 10 billion (not limited to 10 billion and 1)

I used to take a written test. One of the questions in the test was to calculate the number of times that 1 appeared within 40 billion. At that time, I only gave the idea. The specific implementation was not written. Now I will list the specific implementation code. The following code can only calculate the number less than the N power of 10, rather than the x 10 ^ N power. To expand the computation, you mu

Calendar query algorithm How to calculate how many days a day is the basis of knowledge

How do I calculate the day of the week? --Caille (Zeller) formulaWhat is the day of the week in history? What day of the week is the future? There are a number of computational formulae (two general calculation formulae and some piecewise computational formulae), most notably the Caille (Zeller) formula. namely w=y+[y/4]+[c/4]-2c+[26 (m+1)/10]+d-1The symbolic meanings in the formula are as follows, W: week; C: Century -1;y: Year (two digits); M: Month

How to calculate the size of Java objects accurately

Sometimes, we need to know how much memory Java objects occupy, someone to compare two times before and after two times System.GC () to calculate the size of the Java object, or the size of the estimated objects according to the Java object Memory in the Java Virtual Machine specification, These two methods are more or less problematic because System.GC () does not necessarily promote GC, the same type of object in 32-bit and 64-bit JVM uses the same

Shell script example: calculate the time difference in milliseconds and microseconds, and shell microseconds

Shell script example: calculate the time difference in milliseconds and microseconds, and shell microseconds You can use the time command to calculate the execution duration of a command. Although the time command can be precise to milliseconds, the time command cannot calculate the execution time of a bunch of commands. You can also use the date command to

Calculate π values using Python

π is a truly magical number followed by countless people. I am not very clear about the fascinating point of an irrational number that is always repeated. In my opinion, I am happy to calculate π, which is the value of pi. Because π is an irrational number, it is infinite. This means that any calculation of π is just an approximation. If you calculate 100 bits, I can ca

Calculate the area of a photo (WPF chapter)

Yesterday, the old week suddenly wanted to say to the big friends of the UWP app to calculate the size of the photo play, and the old week also indicated that the WPF version of the example. So, give it to the guys today.WPF is integrated in the. NET Framework, and is part of. NET, never tell me that you learn. NET does not learn WPF, which is not right, including ASP. NET, WCF, WF, and so on, are not in essence detached from. Net.No nonsense, no one

Use PHPsimilartext to calculate the similarity between two strings. similartext_PHP tutorial

PHPsimilartext is used to calculate the similarity between two strings, namely, similartext. PHPsimilartext is used to calculate the similarity between two strings. During website development, phpsimilartext is often used to calculate the similarity between two strings. 1. usage of similar_text, for example, using PHP similar text to

Dynamics CRM New Feature (4): Calculate Field & Rollup field

Calculate Field Rollup field can be said to be 2 comparison to the force of the feature, as the dynamics of the CRM version of the update, so the exciting feature is one after another to emerge. As far as calculate field and rollup field are concerned, the prior implementation of such a feature requires the developer to participate, but now it is simple to do with a simple manual configuration.Calculate fi

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