Hi Shi, The 20% regression was prior to implementing a few optimizations on the branch. Here's the later comment: https://issues.apache.org/jira/browse/HDFS-1623?focusedCommentId=13218813&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13218813
Also, the 20% measurement was on a particular stress test designed to target exactly the metadata code path we figured there might be performance impact. So on typical clusters with typical workloads, you shouldn't find any measurable difference. -Todd On Thu, May 3, 2012 at 8:38 AM, Shi Yu <[email protected]> wrote: > Hi Harsh J, > > It seems that the 20% performance lost is not that bad, at least some > smart people are still working to improve it. I will keep an eye on this > interesting trend. > > Shi > -- Todd Lipcon Software Engineer, Cloudera
