Slack is an excellent company with a team of communication and collaboration tools that use more than 750,000 people a day, and are constantly evolving and innovating. Slack has a great range of versatile products that are popular with the public.Although Slack has been very successful, its main source of promotion is verbal propaganda rather than the promotion o
The slack value is usually used to indicate whether the design meets the timing requirements. There are also setup slack and hold slack. If the slack value is positive, it indicates that the design can meet the setup/hold time requirements, and vice versa.
Setup slack = dat
Tags: PMM alert alarmHere is how to increase the alarm function, saying that no alarm function monitoring is not good monitoring!PMM monitoring type mainly has, actually should say is Grafana
e-mail #最常用的, but the disadvantage is that the service provider's SMTP server, often have a delay, be treated as spamThe Official Configuration tutorial:Https://www.percona.com/blog/2017/01/23/mysql-and-mongodb-alerting-with-pmm-and-grafana/?utm_source=tuicool utm_medium=referral
Webhook #不考虑了,
Picture material for reference Ah Halle's BlogThe algorithm is used to solve the shortest path of one point to the remaining verticesLet's start with a diagram and ask for the shortest path from 1 to 6.It reminds me of the almost-hung branch of operations research.Use a two-dimensional array firstThere is also a one-dimensional array that stores the distance from 1 points to each pointThe value of this one-dimensional array is called an estimate. Select a nearest point, point 2, at a point that
A few days ago to read a blog about animation to hand-touch hand to teach you to write slack Loading animation, looking quite flashy, but is an Android version of The imitation of the copy to write an iOS version, the following is I write this animation decomposition ~
The old rules first figure and demo address:
Just saw this animation, the mind appeared in two schemes, one is to draw out through DrawRect, and then with Cadisplaylink constantly d
If mobile access is poor, you can visit my personal blog
A few days ago read a blog about animation called Hand to teach you to write Slack of the Loading animation, looking very flashy, but it is the Android version, thinking of The imitation of writing an iOS version, the following is I write this animation decomposition ~
The usual first and demo address:When I first saw this animation, there were two schemes in my mind, one of which
Baidu issued a statement from February this year said not to be credulous SEO Company's rhetoric and cases, improper SEO may give you the site after the risk, many practitioners in the industry feel that the industry's development prospects will be quite pessimistic, so all kinds of contradictions, all kinds of negative protruding out, And 6.28 of the large-scale K station also directly led to some strength is not very strong optimization company directly close the door, these things have caused
who his mother is. But there is a dog drink not to mind the water, do not know where their mother, how to find his mother. Then we'll compare the characteristics of the dog with those of the puppies. Then take the most similar dog, then his mother is the single dog's mother ~ ~ We can imagine that a Chihuahua must be far away from Teddy.Equivalent to using these three attributes, representing a person. Different people, three attribute values are different. Use vectors [Feature1, Feature2, Feat
this method, the thread has not finished, it will be forced to stop, you think, if this happens in our database of a transaction to operate, what will happen?The correct way to exit a thread is to set a flag bit keeprunning, when the thread executes when Keeprunning=true is Keeprunning=false, and the thread exits, so that the thread exits the thread after execution. This ensures thread security, which is the recommended way to exit threads.Some people say that the interrupt () method can also s
1.
Back up database
Concept: it refers to backing up all data files and control files of the database, and also backing up parameter files and password files.
Note: When backing up a database, do not back up redo logs.
1.1
Consistent backup
Concept: Database Consistency backup refers to the method for backing up all data files and control files after the database is disabled. When the SHUTDOWN command is u
1. System Backup
Based on the degree of preparation of the backup system, it can be divided into three categories: Cold backup, warm backup and hot backup.
1.1 The cold backup system is not installed or configured to the same or s
Tags: sqlAccident background:suddenly the database is corrupted for no apparent reason, and differential or transaction log backups 3 point will be automatically done, then how to 2 Point to 2 Point + data recovery between the ? this needs to be restored by backing up the tail log. Environment Description:A company has installed aSQL Serverdatabase, in order to ensure that the database can be repaired in the event of a failure, the administrator has done ba
1.
backing up a databaseConcept: A backup of all data files and control files for a database, as well as the backup of parameter files and password filesNote: Do not back up the redo log when you back up the database.1.1Consistent backupConcept: Database Consistent backup refers to the method of shutting down all data files and control files for a database
Cold backup:
Cold backup is completed in archive mode.
Close Database
Back up all data files, initialization parameter files, control files, redo logs, and archived redo logs.Parameter file: Show parameter spfile;Control File: Select * from V $ controlfile;Redo log file: Select * from V $ logfile;Archive log files: Select sequence #, first_time v $ loghist;
Hot Bac
"Operating System Error 5 (Access denied)" is displayed during SQL SERVER database backup ). The backup database is being terminated abnormally ." Wrong solution: database backup. backup
"Operating System Error 5 (Access denied) occurs when the SQL SERVER database is backed up ). The
1. Current mainstream backup technologies
Data backup:
That is, the data is backed up, the data to be stored is copied directly, or the data is converted to an image and saved on the computer. Such as Ghost and other backup software, CD burning and Mobile Disk Storage.
This model is easy to understand and can be divided into two types: file-by-file and image. One
Differential backup: Back up data based on full backup. Because the tar command cannot implement differential backup, this article explains how to use the dump and restore commands. Of course, the dump and restore commands can also implement full backup and Incremental backup
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