private void updateDiskGCRVV(RegionVersionVector diskRVV,RegionVersionVector inMemoryRVV,VersionSource member){
  long diskVersion=diskRVV.getVersionForMember(member);
  long memoryGCVersion=inMemoryRVV.getGCVersion(member);
  if (memoryGCVersion <= diskVersion) {
    diskRVV.recordGCVersion(member,memoryGCVersion);
  }
}

private void updateDiskGCRVV ( RegionVersionVector diskRVV , RegionVersionVector inMemoryRVV , VersionSource member ) { long diskVersion = diskRVV . getVersionForMember ( member ) ; long memoryGCVersion = inMemoryRVV . getGCVersion ( member ) ; if ( memoryGCVersion <= diskVersion ) { diskRVV . recordGCVersion ( member , memoryGCVersion ) ; } }
update the on disk gc version for the given member , only if the disk has actually recorded all of the updates including that member .
