Hi Ted I have read the feature, and it says, "The patch appears to be a documentation patch that doesn't require tests."
Can you tell me what patch should add UT, and which would not 2015-03-29 9:44 GMT+08:00 Ted Yu <yuzhih...@gmail.com>: > Himawan: > You don't need to recompile the code. > Please see this thread http://search-hadoop.com/m/LgpTk2FkzEk > > The last comment in that thread led to: > https://issues.apache.org/jira/browse/HDFS-7685 > > Cheers > > On Sat, Mar 28, 2015 at 6:36 PM, Himawan Mahardianto < > mahardia...@ugm.ac.id> wrote: > >> So, if I want to change the default dead time, I have to compile from >> source first? >> Is there any other way that I use to change dead time from native >> hadoop-2.6 (not from source)? >> Or maybe the native doesn't have a feature to change the dead time? >> >> Thank's all for the responses :) >> >> On Sun, Mar 29, 2015 at 8:13 AM, Ted Yu <yuzhih...@gmail.com> wrote: >> >>> Himawan: >>> Please see the following constants >>> in >>> hadoop-hdfs-project//hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java >>> : >>> >>> public static final String >>> DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY = >>> "dfs.namenode.heartbeat.recheck-interval"; >>> >>> public static final int >>> DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_DEFAULT = 5*60*1000; >>> >>> Cheers >>> >>> On Sat, Mar 28, 2015 at 5:48 PM, Himawan Mahardianto < >>> mahardia...@ugm.ac.id> wrote: >>> >>>> Thank you for your response and explanation, but I couldn't find " >>>> dfs.namenode.heartbeat.recheck-interval" parameter on >>>> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml >>>> that you told before, maybe any other formula with this version? >>>> >>>> On Sat, Mar 28, 2015 at 6:42 PM, Brahma Reddy Battula < >>>> brahmareddy.batt...@huawei.com> wrote: >>>> >>>>> HI >>>>> >>>>> The NameNode updates this detail after 10.30 minutes by default. You >>>>> can see the dead and live datanodes at that time. >>>>> >>>>> It computes this heartbeatExpireInterval time by the following formula >>>>> >>>>> heartbeatExpireInterval = 2 * heartbeatRecheckInterval + >>>>> 10 * 1000* heartbeatInterval >>>>> >>>>> where heartbeatRecheckInterval is defined by the configuration >>>>> dfs.namenode.heartbeat.recheck-interval which is 5 minutes by default and >>>>> heartbeatInterval by dfs.heartbeat.interval which is 3 seconds by default. >>>>> >>>>> Hence >>>>> heartbeatExpireInterval = 10.30 minutes >>>>> >>>>> >>>>> SO If you want keep more time, you can configure >>>>> dfs.namenode.heartbeat.recheck-interval based one your requirement.. >>>>> >>>>> >>>>> Thanks & Regards >>>>> >>>>> Brahma Reddy Battula >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------ >>>>> *From:* Himawan Mahardianto [mahardia...@ugm.ac.id] >>>>> *Sent:* Saturday, March 28, 2015 4:42 PM >>>>> *To:* user@hadoop.apache.org >>>>> *Subject:* How to know when datanode are marked dead by namenode >>>>> >>>>> Hi guys I'm newbie here, do you know how to time calculation when >>>>> datanode are marked dead by namenode, what parameters on HDFS-SITE.xml >>>>> should I look for to calculate it, and how can I reduce dead time from >>>>> default 10 minutes to 5 minutes or increase it to 20 minutes? >>>>> Thank's before >>>>> >>>>> best regards >>>>> Himawan Mahardianto >>>>> >>>> >>>> >>> >> >
