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https://issues.apache.org/jira/browse/HADOOP-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HADOOP-1483:
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Attachment: leases-v2.patch
Version 2. Can't be committed until after hadoop-1465 goes in.
Here's commit message:
src/contrib/hbase/src/test/org/apache/hadoop/hbase/TestHStoreKey.java
Added extractFamily tests.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HLogKey.java
Added comment.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/Leases.java
Have leases created, renewed and cancelled using longs rather than
Text. Makes for large savings in object creation.
Javadoc edit. Changed leases Map from TreeMap to HashMap.
(getLeaseId, createLeaseId): Renamed.
(LeaseName, creatLeaseName, getLeaseName): Added.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HStoreKey.java
Added override so can extractFamily with colon appended.
Redid extraction so we used Text#find rather than String.indexOf
Makes for object creations savings.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HRegionServer.java
Pass scannerId long instead of ScannerName creating, cancelling, etc.,
leases for scanners.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HLog.java
Comment.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HMaster.java
Use server name hashCode for lease naming.
* src/contrib/hbase/src/java/org/apache/hadoop/hbase/HRegion.java
servers, rowsToLocks, locksToRows, stores do not need to be
TreeMaps (They are more expensive than hashmaps).
> Use long primitives creating, renewing, and cancelling leases
> -------------------------------------------------------------
>
> Key: HADOOP-1483
> URL: https://issues.apache.org/jira/browse/HADOOP-1483
> Project: Hadoop
> Issue Type: Improvement
> Components: contrib/hbase
> Reporter: stack
> Assignee: stack
> Priority: Minor
> Attachments: leases-v2.patch, leases.patch
>
>
> Profiling, we create a bunch of short-lived objects in hbase around lease
> creation, renewal and release by doing 'new Text(Long.toString(someLong)))'.
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