what lock file

An exception occurs when multiple threads are simultaneously written in sqlite programming. I wrote a class to solve this problem. The idea is simple, that is, when a write operation is started, write down the id of the managed thread for the write

One, file permissions In short, everything is to ensure the security of the directory, to ensure that the security of the directory is more important than the security of the file. Second, write the file File_put_contents ($file, $data); If not,

Case Case: There is a task to collect data for a long time, but during the acquisition process, the operators occasionally commit 2 defects: 1. I don't know where it was collected. 2. Do not know whether the data collected is correct 3. Don't know

After running the bundle install for the first time, the Gemfile.lock file is generated, which records the specific version number of the gem, and according to the official documentation, running the bundle install will no longer be based on the

⑤:jenkins of continuous integration script for automated code deployment and one-click Rollback to the previous version One: This article uses the way Jenkins invokes shell scripts to get code from a git server, package, deploy to a Web server,

Write a robust bash scriptMany people use shell scripts to accomplish simple tasks and become part of their lives. Unfortunately, shell scripts can be very much affected by running exceptions. It is necessary to minimize such problems when writing

I. What is file lock? No one will be unfamiliar with the word lock, because there are a lot of locks in our lives, and they play their role in all aspects, the lock function in the world can be summarized as one sentence, that is, to prevent some

Many people use shell scripts to accomplish simple tasks and become part of their lives. Unfortunately, shell scripts can have a very large impact when they run an exception. It is necessary to minimize this type of problem when writing scripts. In

One, what is the file lock for the word lock, we must not unfamiliar, because there are a lot of locks in our lives, and they all play its part, now the world's lock function can be summed up as a sentence, that is to prevent certain people to do

Shell scripts can have a very large impact when they run an exception. This article describes some of the techniques that make bash scripts robust. Using Set-u How many times did the script crash because there was no initialization of the

One, what is the file lock To lock the word, we must not unfamiliar, because we live in a large number of locks, they play its part in every way, and now the world's lock function can be summed up in a sentence, is to prevent some people to do

Write robust Bash scripts many people use shell scripts to complete some simple tasks and become part of their lives. Unfortunately, shell scripts are greatly affected when an exception occurs. It is necessary to minimize such problems when writing

Original article address:Http://blogread.cn/it/article/743? F = WB   I used Perl to write some monitoring scripts and put them in crontab for scheduling and execution. Sometimes you will find that a script runs for too long and starts multiple

Write some monitoring scripts in Perl and put them in crontab to schedule execution. It is sometimes found that a script runs too long and runs multiple instances at the same time, so it is necessary to control the script and run only one instance.

Write robust Bash scripts many people use shell scripts to complete some simple tasks and become part of their lives. Unfortunately, shell scripts are greatly affected when an exception occurs. It is necessary to minimize such problems when writing

Shell scripting is an essential skill for Linux OPS engineers and a very important skill, so it's only good to learn shell programming well. Basic grammar I will not speak, learn the C language of these languages, a little bit to understand the

Original address: HTTP://BLOGREAD.CN/IT/ARTICLE/743?F=WB Some monitoring scripts are written in Perl and are scheduled for execution in Crontab. Sometimes it is found that a script runs too long and runs multiple instances at the same time, so it

Linux crontab is a good thing, but its default minimum execution frequency is 1 minutes, but we in the actual production environment sometimes encountered the script execution time is more than 1 minutes, so there is a very embarrassing situation,

One, what is file lockFor the word lock, we must not be unfamiliar, because we live in a large number of locks, they play its role in all aspects of the world, now the function of the lock can be summed up as a sentence, is to prevent some people do

PHPflock file lock details. Flock (PHP4, PHP5) flock-description of boolflock (int $ handle, int $ operation [, intlt ;? Php?fpfopen(tmplock.txt, w +); if (flock ($ fp, LOCK_EX flock (PHP 4, PHP 5) Flock-lightweight consultation file