[ https://issues.apache.org/jira/browse/HDFS-13284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lukas Majercak updated HDFS-13284: ---------------------------------- Attachment: HDFS-13284.001.patch > Adjust criteria for LowRedundancyBlocks.QUEUE_VERY_LOW_REDUNDANCY > ----------------------------------------------------------------- > > Key: HDFS-13284 > URL: https://issues.apache.org/jira/browse/HDFS-13284 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs, namenode > Reporter: Lukas Majercak > Assignee: Lukas Majercak > Priority: Major > Attachments: HDFS-13284.000.patch, HDFS-13284.001.patch > > > LowRedundancyBlocks currently has 5 priority queues: > QUEUE_HIGHEST_PRIORITY = 0 - reserved for last > replica blocks > QUEUE_VERY_LOW_REDUNDANCY = 1 - *if ((curReplicas * 3) < > expectedReplicas)* > QUEUE_LOW_REDUNDANCY = 2 - the rest > QUEUE_REPLICAS_BADLY_DISTRIBUTED = 3 > QUEUE_WITH_CORRUPT_BLOCKS = 4 > The problem lies in QUEUE_VERY_LOW_REDUNDANCY. Currently, a block that has > curReplicas=2 and expectedReplicas=4 is treated the same as a block with > curReplicas=3 and expectedReplicas=4. A block with 2/3 replicas is also put > into QUEUE_LOW_REDUNDANCY. > The proposal is to change the *{{if ((curReplicas * 3) < expectedReplicas)}}* > check to *{{if ((curReplicas * 2) <= expectedReplicas || curReplicas == 2)}}* > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org