[ https://issues.apache.org/jira/browse/HDFS-12283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Weiwei Yang updated HDFS-12283: ------------------------------- Attachment: HDFS-12283-HDFS-7240.009.patch > Ozone: DeleteKey-5: Implement SCM DeletedBlockLog > ------------------------------------------------- > > Key: HDFS-12283 > URL: https://issues.apache.org/jira/browse/HDFS-12283 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: ozone, scm > Reporter: Weiwei Yang > Assignee: Yuanbo Liu > Attachments: HDFS-12283.001.patch, HDFS-12283-HDFS-7240.001.patch, > HDFS-12283-HDFS-7240.002.patch, HDFS-12283-HDFS-7240.003.patch, > HDFS-12283-HDFS-7240.004.patch, HDFS-12283-HDFS-7240.005.patch, > HDFS-12283-HDFS-7240.006.patch, HDFS-12283-HDFS-7240.007.patch, > HDFS-12283-HDFS-7240.008.patch, HDFS-12283-HDFS-7240.009.patch > > > The DeletedBlockLog is a persisted log in SCM to keep tracking container > blocks which are under deletion. It maintains info about under-deletion > container blocks that notified by KSM, and the state how it is processed. We > can use RocksDB to implement the 1st version of the log, the schema looks like > ||TxID||ContainerName||Block List||ProcessedCount|| > |0|c1|b1,b2,b3|0| > |1|c2|b1|3| > |2|c2|b2, b3|-1| > Some explanations > # TxID is an incremental long value transaction ID for ONE container and > multiple blocks > # Container name is the name of the container > # Block list is a list of block IDs > # ProcessedCount is the number of times SCM has sent this record to datanode, > it represents the "state" of the transaction, it is in range of \[-1, 5\], -1 > means the transaction eventually failed after some retries, 5 is the max > number times of retries. > We need to define {{DeletedBlockLog}} as an interface and implement this with > RocksDB {{MetadataStore}} as the first version. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org