public void printDispersionScores(
TableName table,
SnapshotOfRegionAssignmentFromMeta snapshot,
int numRegions,
FavoredNodesPlan newPlan,
boolean simplePrint) {
if (!this.targetTableSet.isEmpty() && !this.targetTableSet.contains(table)) {
return;
}
AssignmentVerificationReport report = new AssignmentVerificationReport();
report.fillUpDispersion(table, snapshot, newPlan);
List<Float> dispersion = report.getDispersionInformation();
if (simplePrint) {
DecimalFormat df = new java.text.DecimalFormat("#.##");
System.out.println(
"\tAvg dispersion score: "
+ df.format(dispersion.get(0))
+ " hosts;\tMax dispersion score: "
+ df.format(dispersion.get(1))
+ " hosts;\tMin dispersion score: "
+ df.format(dispersion.get(2))
+ " hosts;");
} else {
LOG.info(
"For Table: "
+ table
+ " ; #Total Regions: "
+ numRegions
+ " ; The average dispersion score is "
+ dispersion.get(0));
}
}
/**
* Verify the region placement is consistent with the assignment plan
*
* @param isDetailMode
* @return reports
* @throws IOException
*/
public List<AssignmentVerificationReport> verifyRegionPlacement(boolean isDetailMode)
throws IOException {
System.out.println(
"Start to verify the region assignment and " + "generate the verification report");
// Get the region assignment snapshot
SnapshotOfRegionAssignmentFromMeta snapshot = this.getRegionAssignmentSnapshot();
// Get all the tables
Set<TableName> tables = snapshot.getTableSet();
// Get the region locality map
Map<String, Map<String, Float>> regionLocalityMap = null;
if (this.enforceLocality == true) {
regionLocalityMap = FSUtils.getRegionDegreeLocalityMappingFromFS(conf);
}
List<AssignmentVerificationReport> reports = new ArrayList<AssignmentVerificationReport>();
// Iterate all the tables to fill up the verification report
for (TableName table : tables) {
if (!this.targetTableSet.isEmpty() && !this.targetTableSet.contains(table)) {
continue;
}
AssignmentVerificationReport report = new AssignmentVerificationReport();
report.fillUp(table, snapshot, regionLocalityMap);
report.print(isDetailMode);
reports.add(report);
}
return reports;
}