salted | Salted : A responsive email template | Email library
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QUESTION
I get the following error when my spark jobs fails **"org.apache.spark.shuffle.FetchFailedException: The relative remote executor(Id: 21), which maintains the block data to fetch is dead."**
Over view of my spark job
input size is ~35 GB
I have broadcast joined all the smaller tables with the mother table into say a dataframe1
and then i salted each big table and dataframe1
before i join it with dataframe1
(left table).
profile used:
...ANSWER
Answered 2022-Feb-04 at 14:48There are multiple things you can try:
- Broadcast Joins: If you have used broadcast hints to join multiple smaller tables, then the resulting table (of many smaller tables) might be too huge to be accommodated in each executor memory. So, you need to look at total size of dataframe1.
- 35GB is really not huge. Also try the profile "EXECUTOR_CORES_MEDIUM", which really increases the parallelism in data computation. Use Dynamic allocation (16 executors should be fine for 35GB) rather than static allocation. If 32 executors are not available at a time, the build doesn't start. "DRIVER_MEMORY_MEDIUM" should be enough.
- Spark 3.0 handles skew joins by itself with Adaptive Query Execution. So, you need not use salting technique. There is a profile called "ADAPTIVE_ENABLED" with foundry that you can use. Other settings of adaptive query execution, you will have to set manually with "ctx" spark context object readily available with Foundry.
Some references for AQE: https://docs.microsoft.com/en-us/azure/databricks/spark/latest/spark-sql/aqe https://spark.apache.org/docs/latest/sql-performance-tuning.html#adaptive-query-execution
QUESTION
I want to know how you can find duplicate values in a table and make it return True. I have seen alot of questions about this but none of them helped, Thanks!
Here's my example :
...ANSWER
Answered 2021-Dec-24 at 14:54Let's suppose you have this table:
QUESTION
I'm doing a user registration in PHP and I'm trying to check, if user account after INSERT
was actually created. What am I doing wrong? $dataR
variable returns nothing, so after every registration, account is created, but the script still returns "Sorry, your registration failed. Please go back and try again."
Thanks for response, feel free to ask!
Connection:
...ANSWER
Answered 2021-Nov-25 at 15:17I changed $dataR = $sql->get_result();
to $dataR = $sql->affected_rows;
, so the final code looks like:
QUESTION
I am using PostgreSQL for storing username and their corresponding salted and hashed password but it is continuously giving me this error.
...ANSWER
Answered 2021-Nov-08 at 16:05To be clear what is happening:
QUESTION
I have little experience with encryption / decryption..
for my web app I want to use Apache Shiro to login user, with salted password ..
this is the article I read : http://shiro.apache.org/realm.html#Realm-HashingCredentials and the code to generate the salted password :
...ANSWER
Answered 2021-Nov-08 at 14:27Thanks to Benjamin Marwell :
This is possible only in theory and/or with a lot of money. You can use hacking tools which run on your GPU, but even then it might take years to find it. And that is exactly the point: Password-based key derivation functions are designed to create an in-revertable hash.
Shiro 2.0 will use even better KDFs like Argon2 or bcrypt/script, which require a vast amount of memory and cpu to make attacks not feasible.
If you have access to the database where you stored the password, I would just set a new password and forget about the old one, if possible.
QUESTION
I am using MYSQL for storing username and their corresponding salted and hashed password it is giving me continuously this error.
...ANSWER
Answered 2021-Nov-05 at 20:17HASHEDPASS
apparently contains a '
character, which is ending the string '{USER_PASSWORD}'
early.
Use parameters to cursor.execute()
rather than substituting variables directly into the SQL string.
QUESTION
if someone could explain why the getter method in this code is returning undefined, that would be appreciated. I figured it might be something to do with the 'this' context. Is the this.appetizers returning undefined because of the this context? When I call a method on the object and then that method calls the get method it fails, is this because the this context changes to the function object? I thought this could be the case but I have another code example that does this and it works fine.
...ANSWER
Answered 2021-Oct-29 at 23:26As mentioned in the comments, it's undefined. This is because even though you have a getter, it still sits under the _courses
object:
QUESTION
With the following code below I thought that the text would wrap within its container, but the text wraps to the beginning of the line.
How do I get the text to wrap within its own container?
Thank you
...ANSWER
Answered 2021-Oct-25 at 20:22You can perhaps use flex-box and add the next line to recsubsection selector in your CSS code:
display: flex;
This way you wrap each span within its own container. (You should also change your HTML code and use more semantically meaningful tags)
QUESTION
I am using RabbitMQ with Docker. I would like to update the configurations directly in the definitions.json
file. The users should have their password stored there with rabbit_password_hashing_sha256
hashing algorithm. I have found a useful Python script for hashing the password but I was not able to reproduce it's logic in NodeJS with Crypto library.
Python script:
...ANSWER
Answered 2021-Oct-06 at 18:17You can do the port to NodeJS more or less 1:1:
QUESTION
I have a python password management system program and I am looking to see if I can convert it into a gui based program.
a snippet from the program :
...ANSWER
Answered 2021-Sep-20 at 06:47First step, modify your signup function to take the inputs as parameters instead of using input
.
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