Skip to main content

Popular posts from this blog

MPlayer subtitle font problem in Windows

While playing a video with subtitles in mplayer, I was getting the following problem: New_Face failed. Maybe the font path is wrong. Please supply the text font file (~/.mplayer/subfont.ttf). Solution is as follows: Right click on "My Computer". Select "Properties". Go to "Advanced" tab. Click on "Environment Variables". Delete "HOME" variable from User / System variables.
4 comments
Read more

wget and curl behind corporate proxy throws certificate is not trusted or certificate doesn't have a known issuer

If you try to run wget or curl in Ununtu/Debian behind corporate proxy, you might receive errors like: ERROR: The certificate of 'apertium.projectjj.com' is not trusted. ERROR: The certificate of 'apertium.projectjj.com' doesn't have a known issuer. wget https://apertium.projectjj.com/apt/apertium-packaging.public.gpg ERROR: cannot verify apertium.projectjj.com's certificate, issued by 'emailAddress=proxyteam@corporate.proxy.com,CN=diassl.corporate.proxy.com,OU=Division UK,O=Group name,L=Company,ST=GB,C=UK': Unable to locally verify the issuer's authority. To connect to apertium.projectjj.com insecurely, use `--no-check-certificate'. To solution is to install your company's CA certificate in Ubuntu. In Windows, open the first part of URL in your web browser. e.g. open https://apertium.projectjj.com in web browser. If you inspect the certifcate, you will see the same CN (diassl.corporate.proxy.com), as reported by the error above
Post a Comment
Read more

Kafka performance tuning

Performance Tuning of Kafka is critical when your cluster grow in size. Below are few points to consider to improve Kafka performance: Consumer group ID : Never use same exact consumer group ID for dozens of machines consuming from different topics. All of those commits will end up on the same exact partition of __consumer_offsets , hence the same broker, and this might in turn cause performance problems. Choose the consumer group ID to group_id+topic_name . Skewed : A broker is skewed if its number of partitions is greater that the average of partitions per broker on the given topic. Example: 2 brokers share 4 partitions, if one of them has 3 partitions, it is skewed (3 > 2). Try to make sure that none of the brokers is skewed. Spread : Brokers spread is the percentage of brokers in the cluster that has partitions for the given topic. Example: 3 brokers share a topic that has 2 partitions, so 66% of the brokers have partitions for this topic. Try to achieve 100% broker spread
1 comment
Read more