Re: 0.10.1 memory and garbage collection issues

2017-07-10 Thread Matt Andruff
Total shot in the dark but could it be related, this talks about CPU but could have an impact on memory as well: http://kafka.apache.org/0102/documentation.html#upgrade_10_performance_impact Hope this helps. On Sun, 9 Jul 2017 at 10:45 John Yost wrote: > Hey Ismael, > > Thanks a bunch for resp

Re: Windows OS platform support

2017-07-18 Thread Matt Andruff
This is a really common issue with windows. You can try turning off backups/virus scanning of that folder and sometimes this relieves the issue. (I assume there is a file attribute you can alter.) It's probably the case that Kafka itself has the file open, as linux does not have issues if you mo

Re: Upgrade by replacing brokers?

2017-07-27 Thread Matt Andruff
I would not mess with internals like this. It's safer if you treat this like a special case of a Broker expansion. Don't forget if you are going to have mixed lineage brokers: *From the documentation* 1. Update server.properties file on all brokers and add the following properties:

New Partition Strategy for Even Disk Usage

2017-08-16 Thread Matt Andruff
Good Day, I'm looking for someone to poke holes in my theory. I want to balance my disk usage across brokers. I want to maintain order per partition. Yes there are tools but they require manual intervention. What if created a custom partition strategy. The strategy is to take the existing part

Re: performance test using real data - comparing throughput & latency

2017-09-15 Thread Matt Andruff
Look,. I'm a huge fan of sending identical data and using plane old 'wall time' and averaging a couple runs to make sure you remove any whoops. You can use fancy tools for reporting but in the real world wall time still is the most critical factor. And let's face it it's also simple to measure.

Re: Kafka : To meny files open

2018-01-03 Thread Matt Andruff
You should check the kafka docs. You need to increase your open file descriptors. Here's a link that describes how to do it. (Ignore that this is for hdp the ulimit part is what you need to pay attend to.) You can also check kafka docs too they say to change open file descriptors to 100,000 I

Re: Partition rebalancing when both leader and follower is down?

2018-02-09 Thread Matt Andruff
Can you clear up what you mean by "both leader and replica nodes are down for a given partition" If all the nodes are down for a partition you can't move the partition as you don't have any data to copy. (As this is a fundamental part of re-balancing and leader election. I don't think it will wor