Hi All,
There are default values of configs in hdfs-default.xml and
core-default.xml, and I am wondering which situation are they for? Are they
closer to lab use, or closer to real production environment?
Maybe it depends on different configs, then I have questions to these
certain configs as follows:
Hadoop 2.7.3
1.dfs.namenode.heartbeat.recheck-interval: the default value is 5min which
makes the datanode to be marked as dead by the namenode after 10:30 minutes. I
set it to 30s, and gain a lot of removing and registering in
namanode's log. Is 5min too long, maybe 2.5min?
2.avoid stale: I notice there is a stale state of datanode but is off by
default. I feel it's good, is it advised to set on?
Thanks in advance,
Doris
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