[jira] [Created] (HDFS-5132) Deadlock in namenode while running load generator with 15 threads

Arpit Gupta created HDFS-5132: - Summary: Deadlock in namenode while running load generator with 15 threads Key: HDFS-5132 URL: https://issues.apache.org/jira/browse/HDFS-5132 Project: Hadoop HDFS

Re: hsync is too slower than hflush

It's syncing the checksum file, so the disk head very likely has to move. There are rotational seek delays too. On Mon, Aug 26, 2013 at 7:30 AM, lei liu wrote: > Hi all, > > DataNode sequential write file, so I think the disk seek time should be > very small.Why is disk seek time 10ms? I think

Re: hsync is too slower than hflush

Hi all, DataNode sequential write file, so I think the disk seek time should be very small.Why is disk seek time 10ms? I think that is too long. Whether we can optimize the linux system configuration, reduce disk seek time. 2013/8/26 haosdent > haha, thank you very much, I get it now. > > -- >

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Hadoop-Hdfs-0.23-Build - Build # 711 - Still Failing

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[jira] [Created] (HDFS-5131) Need a DEFAULT-like pipeline recovery policy that works for writers that flush

Mike Percy created HDFS-5131: Summary: Need a DEFAULT-like pipeline recovery policy that works for writers that flush Key: HDFS-5131 URL: https://issues.apache.org/jira/browse/HDFS-5131 Project: Hadoop HD