Collection<ServerName> servers = clusterStatus.getServers();
final long megaByte = 1024L * 1024L;
//iterate all cluster regions, filter regions from our table and compute their size
for (ServerName serverName: servers) {
ServerLoad serverLoad = clusterStatus.getLoad(serverName);
for (RegionLoad regionLoad: serverLoad.getRegionsLoad().values()) {
byte[] regionId = regionLoad.getName();
if (tableRegions.contains(regionId)) {
long regionSizeBytes = regionLoad.getStorefileSizeMB() * megaByte;