Skip to main content

EMR cluster logs

A cluster generates several types of log files, including:
  • Step logs — These logs are generated by the Amazon EMR service and contain information about the cluster and the results of each step. The log files are stored in /mnt/var/log/hadoop/steps/ directory on the master node. Each step logs its results in a separate numbered subdirectory: /mnt/var/log/hadoop/steps/1/ for the first step, /mnt/var/log/hadoop/steps/2/, for the second step, and so on.
  • Hadoop logs — These are the standard log files generated by Apache Hadoop. They contain information about Hadoop jobs, tasks, and task attempts. The log files are stored in /mnt/var/log/hadoop/ on the master node.
  • Bootstrap action logs — If your job uses bootstrap actions, the results of those actions are logged. The log files are stored in /mnt/var/log/bootstrap-actions/ on the master node. Each bootstrap action logs its results in a separate numbered subdirectory: /mnt/var/log/bootstrap-actions/1/ for the first bootstrap action, /mnt/var/log/bootstrap-actions/2/, for the second bootstrap action, and so on.
  • Instance state logs — These logs provide information about the CPU, memory state, and garbage collector threads of the node. The log files are stored in /mnt/var/log/instance-state/ on the master node.
Labels:

Comments

Post a Comment

Popular posts from this blog

What is the difference between Elastic and Enterprise Redis w.r.t "Hybrid Query" capabilities

  We'll explore scenarios involving nested queries, aggregations, custom scoring, and hybrid queries that combine multiple search criteria. 1. Nested Queries ElasticSearch Example: ElasticSearch supports nested documents, which allows for querying on nested fields with complex conditions. Query: Find products where the product has a review with a rating of 5 and the review text contains "excellent". { "query": { "nested": { "path": "reviews", "query": { "bool": { "must": [ { "match": { "reviews.rating": 5 } }, { "match": { "reviews.text": "excellent" } } ] } } } } } Redis Limitation: Redis does not support nested documents natively. While you can store nested structures in JSON documents using the RedisJSON module, querying these nested structures with complex condi...
Post a Comment
Read more

Training LLM model requires more GPU RAM than storing same LLM

Storing an LLM model and training the same model both require memory, but the memory requirements for training are typically higher than just storing the model. Let's dive into the details: Memory Requirement for Storing the Model: When you store an LLM model, you need to save the weights of the model parameters. Each parameter is typically represented by a 32-bit float (4 bytes). The memory requirement for storing the model weights is calculated by multiplying the number of parameters by 4 bytes. For example, if you have a model with 1 billion parameters, the memory requirement for storing the model weights alone would be 4 GB (4 bytes * 1 billion parameters). Memory Requirement for Training: During the training process, additional components use GPU memory in addition to the model weights. These components include optimizer states, gradients, activations, and temporary variables needed by the training process. These components can require additional memory beyond just storing th...
Post a Comment
Read more

Error: could not find function "read.xlsx" while reading .xlsx file in R

Got this during the execution of following command in R > dat Error: could not find function "read.xlsx" Tried following command > install.packages("xlsx", dependencies = TRUE) Installing package into ‘C:/Users/amajumde/Documents/R/win-library/3.2’ (as ‘lib’ is unspecified) also installing the dependencies ‘rJava’, ‘xlsxjars’ trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/rJava_0.9-8.zip' Content type 'application/zip' length 766972 bytes (748 KB) downloaded 748 KB trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/xlsxjars_0.6.1.zip' Content type 'application/zip' length 9485170 bytes (9.0 MB) downloaded 9.0 MB trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/xlsx_0.5.7.zip' Content type 'application/zip' length 400968 bytes (391 KB) downloaded 391 KB package ‘rJava’ successfully unpacked and MD5 sums checked package ‘xlsxjars’ successfully unpacked ...
Post a Comment
Read more