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Mydumper supports streaming of backups right from version 0.11.3 and the latest version Mydumper 0.12.3 it enabled its support for compressed streaming backup. This was the most awaited feature added to Mydumper, making it a more powerful tool for data migration to RDS or Cloud.

If you are hearing mydumper for the first time, then let’s have a quick catch-up on what Mydumper is and what it does exactly.

Mydumper is a multithread logical backup and restores tool for MySQL and its forks. To know more you can refer to our previous blogs/presentations below.

• https://mydbops.wordpress.com/2016/01/31/faster-logical-backup-with-mydumper/
• https://mydbops.wordpress.com/2019/03/26/mysqldump%e2%80%8b-vs-mysqlpump-vs-mydumper/

In this blog, we will discuss in short how this streaming process works and how to get the required output.

1. How does this work?
2. How to use it?
3. Key Takeaways:

How does this work?

The working of the stream is quite simple

• Mydumper threads read data from the source DB and write to the file system parallels.
• Now mydumper stream thread enqueues these files one by one and pipes them to the stdout.
• Myloader stream reads them and writes to its local filesystem.
• Now myloader threads restore them parallel to the destination by maintaining the thread_id sequence.

How to use it?

Below is the working command which I have used for the production use case to restore a table to RDS using stream.

mydumper -t 6 -u mydbops --password='XXXXXXX' -h localhost -P 3306 --compress -o /mysql/logs/backup -B 'testdb' -T 'testdb.member --stream | myloader --threads=4 -u admin --password='XXXXX' -h 'mydbops-stg.bvbkjkuliuie.ap-south-1.rds.amazonaws.com' -P 3308 -v 4 -d /mysql/logs/restore -o -B ‘testdb’ --stream

–stream : mydumper indicates that files created need to be streamed through STDOUT.

–stream : myloader will create a thread to read the stream and creates the file locally

–no-delete : retains the files locally in both source and destination this is optional

By default, once the file is successfully transferred from the source it gets deleted immediately, similarly at the destination once the streamed file is applied it gets deleted from its file system. This avoids high disk utilization during file backup when migrating a high volume of data.

Logs: 
** Message: 12:11:12.002: File backup/testdb-member-create.sql.gz transfered | Global: 0 MB/s

** Message: 12:11:12.003: Thread 3 dumping schema for `testdb`.`member`

** Message: 12:11:12.003: Thread 4 dumping data for`testdb`.`member`| Remaining jobs: -3

** Message: 12:11:12.003: Opening: backup/testdb-member-schema.sql.gz

** Message: 12:11:12.003: File backup/testdb-member-schema.sql.gz transfered | Global: 0 MB/s

** Message: 12:11:12.064: Non-InnoDB dump complete, unlocking tables

** Message: 12:11:12.064: Shutdown jobs enqueued

** Message: 12:27:54.912: Finished dump at: 2022-06-09 12:27:54

** Message: 12:27:54.913: Removing file: /mysql/logs/restore/restore/testdb-member-schema.sql.gz

** Message: 12:27:54.914: Thread 4 restoring table `testdb`.`member` from 

** Message: 12:27:56.433: Removing file: /mysql/logs/restore/restore/testdb-member.00000.sql.gz

** Message: 12:27:56.434: Shutting down stream thread 2

** Message: 12:27:56.434: Starting table checksum verification

Key Takeaways:

• With a stream, Mydumper is considered an easy and faster method for the migration of data
• Disk utilization is always kept under control with an auto-purge of backup files.

Planet MySQL

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The Surgeon Loop Knot is the fastest and easiest loop knot to tie. If you can tie an overhand knot, you can tie this knot. While it isn’t as neat and elegant as some other loop knots, it is a very strong loop knot that does not easily slip. You can use the Surgeon Loop Knot to make a loop at the end of your line for attaching weights or clips. Or as shown in this article, to make a loop to where you are attaching your hook or lure. While it is shown with a hook in this article, this knot excels for tying on lures and flies. The open loop gives whatever is tied to more action and movement. For just tying an empty loop just follow the same instructions without a hook.

Step 1

Run the line through the eye of the hook and bring the tag end of the line back along the mainline. Make sure your tag end of the line is long enough for the overhand loop to pass over the hook or lure.

Step 2

Make an overhand loop using the doubled line and hook, make sure to keep the lines together and not twisted.

Step 3

Pass the doubled line and hook through the overhand loop in the mainline one more time, again keeping this tidy is important for the final knot.

Step 4

Moisten the knot and line then hold the hook or lure and the standing line and pull to tighten the knot. Make sure to adjust the loop size at this point. Once the knot has been snugged down trim the tag end to about a 1/4 inch. For fishing lures and jigs you want to have a loop about the size of an M&M, anything bigger and cause the lure to tangle.

The post Are You Nuts? Know your Fishing Knots! – The Surgeon Loop Knot appeared first on AllOutdoor.com.

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It’s been a long time since we needed floppy disks to store data. But we still enjoyed watching this retro factory video posted by StirlingEngineering, which shows how they used to produce 3.5″ floppies. It’s a satisfying 5-minutes sequence of mechanical ear candy.

The Awesomer

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Elide Fire makes this innovative firefighting device – a ball that can be tossed into a fire to instantly extinguish or reduce its intensity. The ball automatically deploys upon contact with a flame and smothers it with a blanket of non-toxic chemicals. It can also be placed in a high-risk location where it will activate in case of fire.

The Awesomer

Chapter 9 of Efficient MySQL Performance changed in development. Originally, it was a chapter titled “Not MySQL”, as in “how not to use MySQL.” But we (O’Reilly and I) pulled the chapter, and the current chapter 9 in print is “Other Challenges”: an important laundry list of other challenges engineers using MySQL must be aware of and address. This blog post is a sketch of the unwritten chapter 9: how not to use MySQL.

Planet MySQL

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Chick-fil-A is bland, overrated chicken. Being honest with ourselves is important. It’s generic fast food in desperate need of a few more herbs and/or spices. That doesn’t mean the legend of Chick-fil-A employees isn’t something to both praise and marvel at. They go above and beyond in serving their community. As opposed to lazy Mcdonald’s employees who expect $25 an hour to throw frozen meat in the microwave and never fix the shake machine.

The legend grows in Florida as one employee took a break from slinging barely seasoned nuggets to save a woman and her baby by choking the f*ck out of their would-be carjacker.

The punk’s name is William Branch. According to Whiskey Riff (who, like me, can’t wait for the new Koe Wetzel album on Friday), Branch tried to jack the car using a stick. This does not look like the face of the man who grasps the irony.

The woman screamed as Branch worked his way into her car. Upon hearing the cries of a damsel in distress, the mystery Chick-fil-A employee lept into action. He pulled Branch from the car, wrestled him to the ground, then put Branch in a chokehold until help arrived. It was a solid chokehold, too. If the anonymous Florida resident isn’t training at American Top Team yet, he should.

Branch is being charged with carjacking with a weapon (the stick Branch used) and battery. Our mystery Chick-fil-A employee remains just that, walking off into the horizon until he is called on again to save the day.

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Swedish Election PROVES The Left Is Engineering Racism! | Louder With Crowder

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The San Diego Jam Knot, as its name implies comes from a sportfishing capital of the world. The city is the gateway to the Pacific for anglers chasing after tunas, seabass, and yellowtail. The San Diego Jam Knot was originally tied as a quick and easy way of tying “irons” jigs when chasing big tuna on long-range boats off the coast of Mexico.

This knot is a great choice for all line types: mono, fluorocarbon, and braid. When making sure the jam knot is fully set and tight on a hook or lure, you can attach the hook to a fixed object and give a strong pull. That will make sure the knot is set tight and won’t come loose when fished. This knot is one of the stronger knots available and has been tested rigorously by the San Diego Tuna boats.

Step 1

Run the line through the eye of the hook and bring the tag end of the line back along the mainline.

Step 2

Take the tag end of the line and then wrap it around the main line multiple times, a minimum of 4 wraps, the more the better. The thicker the diameter of the line the fewer wraps needed, and the thinner the line or if using braided line more wraps are needed

Step 3

Take the tag end of the line and pass it through the double line next to the eye of the hook and then the loop made by the first wrap.

Step 4

Hold the hook or lure and pull and adjust the tag end of the line to tighten the knot up after moistening the line. Be careful not to mess up the wraps and have them go over each other.

Step 5

Trim off the excess line from the tag end of the line, leaving about 1/4″ behind for the tag. Then pull the knot down to the eye of the hook and tighten it up. You can put the hook or lure somewhere solid and give it a solid pull to make sure the knot is tight. This is the finished San Diego Jam Knot.

The post Are You Nuts? Know your Fishing Knots! – The San Diego Jam Knot appeared first on AllOutdoor.com.

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