Every time cassandra creates a new sstable , it will call the
CompactionManager.submitMinorIfNeeded ? And if the number of memtables is
beyond MinimumCompactionThreshold , the minor compaction will be called.
And there is also a method named CompactionManager.submitMajor , and the
call relationship is :
NodeCmd -- > NodeProbe -->StorageService.forceTableCompaction -->
Table.forceCompaction -->CompactionManager.performMajor -->
CompactionManager.submitMajor
ColumnFamilyStore.forceMajorCompaction --> CompactionManager.performMajor
--> CompactionManager.submitMajor
HintedHandOffManager
--> CompactionManager.submitMajor
So i have 3 questions:
1. Once a new sstable has been created ,
CompactionManager.submitMinorIfNeeded will be called , minorCompaction
maybe called .
But when will the majorCompaction be called ? Just the NodeCmd ?
2. Which jobs will minorCompaction and majorCompaction do ?
Will minorCompaction delete the data that have been marked as deleted ?
And how about the major compaction ?
3. When gc be called ? Every time compaction been called?
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Best regards,
Ivy Tang
