public static String updateCompactionHistory(
String keyspaceName,
String columnFamilyName,
AbstractCompactionIterable ci,
long startSize,
long endSize) {
long[] counts = ci.getMergedRowCounts();
StringBuilder mergeSummary = new StringBuilder(counts.length * 10);
Map<Integer, Long> mergedRows = new HashMap<>();
for (int i = 0; i < counts.length; i++) {
long count = counts[i];
if (count == 0) continue;
int rows = i + 1;
mergeSummary.append(String.format("%d:%d, ", rows, count));
mergedRows.put(rows, count);
}
SystemKeyspace.updateCompactionHistory(
keyspaceName, columnFamilyName, System.currentTimeMillis(), startSize, endSize, mergedRows);
return mergeSummary.toString();
}
