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MySQL 8 And The FRM Drop… How To Recover Table DDL
This is where your need to create tables explicitly comes into play. For the dynamic create statement, table_format=STATEMENT is going to create the table with a traditional RBR/LBR structure. while your create table statement uses ROW column format for the CREATE TABLE syntax: CREATE TABLE tablename (…col1 col2 col3 …) ROW FORMAT=COMPACT. This
How to call a script from a vim’s mapping?
I’m trying to remap a vim’s key combination. As I don’t use it often, I am not familiar with its key map. I googled around and found this. And it solved the issue I was having.
For example, I created a mapping that changes color.
nnoremap :echo “b”
:map :echo “c”
However, what if I wanted to call a script directly? How do I trigger such a mapping with a script? I am afraid that there are many different ways to trigger such a mapping, and hence I’m completely confused now.
I tried to use eval like this:
nnoremap :call ColorChange.Color(“b”)
:map :call ColorChange.Color(“c”)
But it did not work.
The file ColorChange.Color exists in the same folder as the vimrc file.
You can use :execute here:
nnoremap :execute “call ColorChange.Color(‘”. escape(expand(“”), ”). “‘”
That should be enough to solve the problem.
(note that I used cword instead of c)
What is the best way to handle this Java architecture question?
I’m working on a project that models university courses. These courses have topics. My design is a KTable: A student completes a course, by writing assignments and taking exams. This all works well, and I have an aggregate client that can find all the participants in a course, find all the students who have completed a course, find all the courses they have taken, etc.
However, I’m having a problem handling some external factors that may come into play – namely:
Everything You Wanted to Know About Storage Engines (MySQL 5.6)?
Actually, if you’re using InnoDB, then you should just be able to alter the FILE table and change its location. That will switch it to the location of the ibdata1 file. I don’t know why you’d be running into problems, but your table is not set up for InnoDB, so you should be able to fix that.
If, however, you’re using MyISAM, you’ll have to just duplicate the file, and change the location that you set in the ibdata1 file.
Since you’re using MyISAM, you can just run DROP TABLE, followed by CREATE TABLE.
It would be advisable to take a few backups before running either of the above commands.
DROP TABLE should succeed pretty quickly (unless you run into problems, which will be fairly simple to repair), and CREATE TABLE should take a while due to the large size of the table, and the amount of data being duplicated.
Node.js on Nginx and Google Cloud Platform
Lately I have been playing with node.js on Nginx and
Google Cloud Platform. I was working on a reactive long
polling chat in one of my project. I was testing in local
environment and it was working as expected. I was using
wildcard subdomains (weird.com name). Then I decided to
ship it to my customer and created a WordPress site.
Here are the things I learned during my whole
If you are using aws there is no way to create
subdomains for your application
I would suggest to host your website on
Blank WordPress (or a similar theme) and use
CloudFlare CDN service
Install a wildcard SSL
Update all the files in the root
Download these files:
and enter these commands:
npm install gulp
npm install gulp-cli
This is a gist for
config.xml and index.html files
This is a gist for index.css
npm install node-modules/node.js
This is a gist for node.js
Gulp setup script:
Â Backup MySQL databases using Percona Toolkit Â . MySQL 8.0 introduces a new format for backup and restores. Tables with fewer than four pages are now automatically stored with no fragmentation.
So, I have created the following simple MySQLServer backup script for backing up a MySQL server to MySQLServer and would like to know how effective (and, more importantly, what bad practices I may be doing that will break this) this script is in terms of storage and other performance aspects of a MySQLServer environment.
MySQL Backup Script
# Setup the environment variables used by this script
if [ “$MYSQL” == “” ]; then
echo “ERROR: Could not find the MySQL executable on your system path.”
echo “Are you in the right directory?”
# Check if a MySQLServer database was provided, if yes, then execute the backup and restore
if [ “$1” == “” ]; then
echo “Backup of: $MYSQL”
echo “Backup to $1”
# Make the database directory if it does not exist.
test -d $1
if [ $? == 0 ]; then
echo “Making directory $1”
# move symlinks
for file in `ls D:PerformancePerconaBackupmysql`; do
mv $file D:PerformancePerconaBackupmysql
# backup the databases
for Db in `ls D