Repository: kafka Updated Branches: refs/heads/trunk 98928f7ad -> 0e1c012fb
KAFKA-3683; Add file descriptor recommendation to ops guide Adding sizing recommendations for file descriptors to the ops guide. Author: Dustin Cote <[email protected]> Author: Dustin Cote <[email protected]> Reviewers: Gwen Shapira Closes #1353 from cotedm/KAFKA-3683 and squashes the following commits: 8120318 [Dustin Cote] Adding file descriptor sizing recommendations 0908aa9 [Dustin Cote] Merge https://github.com/apache/kafka into trunk 32315e4 [Dustin Cote] Merge branch 'trunk' of https://github.com/cotedm/kafka into trunk 13309ed [Dustin Cote] Update links for new consumer API 4dcffc1 [Dustin Cote] Update links for new consumer API Project: http://git-wip-us.apache.org/repos/asf/kafka/repo Commit: http://git-wip-us.apache.org/repos/asf/kafka/commit/0e1c012f Tree: http://git-wip-us.apache.org/repos/asf/kafka/tree/0e1c012f Diff: http://git-wip-us.apache.org/repos/asf/kafka/diff/0e1c012f Branch: refs/heads/trunk Commit: 0e1c012fb551f32cf27b6b7367749047c374ee97 Parents: 98928f7 Author: Dustin Cote <[email protected]> Authored: Tue May 24 17:26:54 2016 -0700 Committer: Gwen Shapira <[email protected]> Committed: Tue May 24 17:26:54 2016 -0700 ---------------------------------------------------------------------- docs/ops.html | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kafka/blob/0e1c012f/docs/ops.html ---------------------------------------------------------------------- diff --git a/docs/ops.html b/docs/ops.html index faf5453..7413129 100644 --- a/docs/ops.html +++ b/docs/ops.html @@ -468,13 +468,12 @@ Kafka should run well on any unix system and has been tested on Linux and Solari <p> We have seen a few issues running on Windows and Windows is not currently a well supported platform though we would be happy to change that. <p> -You likely don't need to do much OS-level tuning though there are a few things that will help performance. -<p> -Two configurations that may be important: +It is unlikely to require much OS-level tuning, but there are two potentially important OS-level configurations: <ul> - <li>We upped the number of file descriptors since we have lots of topics and lots of connections. - <li>We upped the max socket buffer size to enable high-performance data transfer between data centers <a href="http://www.psc.edu/index.php/networking/641-tcp-tune";>described here</a>. + <li>File descriptor limits: Kafka uses file descriptors for log segments and open connections. If a broker hosts many partitions, consider that the broker needs at least (number_of_partitions)*(partition_size/segment_size) to track all log segments in addition to the number of connections the broker makes. We recommend at least 100000 allowed file descriptors for the broker processes as a starting point. + <li>Max socket buffer size: can be increased to enable high-performance data transfer between data centers as <a href="http://www.psc.edu/index.php/networking/641-tcp-tune";>described here</a>. </ul> +<p> <h4><a id="diskandfs" href="#diskandfs">Disks and Filesystem</a></h4> We recommend using multiple drives to get good throughput and not sharing the same drives used for Kafka data with application logs or other OS filesystem activity to ensure good latency. You can either RAID these drives together into a single volume or format and mount each drive as its own directory. Since Kafka has replication the redundancy provided by RAID can also be provided at the application level. This choice has several tradeoffs.
