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Takanobu Asanuma commented on HDFS-11505: ----------------------------------------- Hi all, thanks for the discussion. If we don't enable any EC policies by default, I feel a little anxious that some admins might set low-redundant EC policies to high-level directories for large clusters. IIUC, RS(6,3) or RS(10,4) is a recommended policy for large clusters. How about adding the notes to the EC document? > Do not enable any erasure coding policies by default > ---------------------------------------------------- > > Key: HDFS-11505 > URL: https://issues.apache.org/jira/browse/HDFS-11505 > Project: Hadoop HDFS > Issue Type: Improvement > Components: erasure-coding > Affects Versions: 3.0.0-alpha3 > Reporter: Andrew Wang > Assignee: Manoj Govindassamy > Labels: hdfs-ec-3.0-must-do > > As discussed on HDFS-11314, administrators need to choose the correct set of > EC policies based on cluster size and desired fault-tolerance properties. > This means we should not enable any EC policies by default, since any default > value could be incorrect. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org