static void doTserverList(
HttpServletRequest req,
StringBuilder sb,
List<TabletServerStatus> tservers,
String tableId,
Table tServerList) {
int guessHighLoad = ManagementFactory.getOperatingSystemMXBean().getAvailableProcessors();
long now = System.currentTimeMillis();
double avgLastContact = 0.;
for (TabletServerStatus status : tservers) {
avgLastContact += (now - status.lastContact);
}
final long MINUTES = 3 * 60 * 1000;
tServerList.addSortableColumn("Server", new TServerLinkType(), null);
tServerList.addSortableColumn(
"Hosted Tablets", new NumberType<Integer>(0, Integer.MAX_VALUE), null);
tServerList.addSortableColumn(
"Last Contact",
new DurationType(0l, (long) Math.min(avgLastContact * 4, MINUTES)),
null);
tServerList.addSortableColumn(
"Entries", new NumberType<Long>(), "The number of key/value pairs.");
tServerList.addSortableColumn(
"Ingest",
new NumberType<Long>(),
"The number of key/value pairs inserted. (Note that deletes are also 'inserted')");
tServerList.addSortableColumn(
"Query",
new NumberType<Long>(),
"The number of key/value pairs returned to clients. (Not the number of scans)");
tServerList.addSortableColumn(
"Hold Time",
new DurationType(),
"The amount of time ingest is suspended waiting for data to be written to disk.");
tServerList.addSortableColumn(
"Running<br />Scans",
new CompactionsType("scans"),
"The number of scans running and queued on this tablet server.");
tServerList.addSortableColumn(
"Minor<br />Compactions",
new CompactionsType("minor"),
"The number of minor compactions running and (queued waiting for resources). Minor compactions are the operations where entries are flushed from memory to disk.");
tServerList.addSortableColumn(
"Major<br />Compactions",
new CompactionsType("major"),
"The number of major compactions running and (queued waiting for resources). "
+ "Major compactions are the operations where many smaller files are grouped into a larger file, eliminating duplicates and cleaning up deletes.");
tServerList.addSortableColumn(
"Index Cache<br />Hit Rate", new PercentageType(), "The recent index cache hit rate.");
tServerList.addSortableColumn(
"Data Cache<br />Hit Rate", new PercentageType(), "The recent data cache hit rate.");
tServerList.addSortableColumn(
"OS Load",
new NumberType<Double>(0., guessHighLoad * 1., 0., guessHighLoad * 3.),
"The Unix one minute load average. The average number of processes in the run queue over a one minute interval.");
log.debug("tableId: " + tableId);
for (TabletServerStatus status : tservers) {
if (status == null) status = NO_STATUS;
TableInfo summary = Monitor.summarizeTableStats(status);
if (tableId != null) summary = status.tableMap.get(tableId);
if (summary == null) continue;
TableRow row = tServerList.prepareRow();
row.add(status); // add for server name
row.add(summary.tablets);
row.add(now - status.lastContact);
row.add(summary.recs);
row.add(summary.ingestRate);
row.add(summary.queryRate);
row.add(status.holdTime);
row.add(summary); // add for scans
row.add(summary); // add for minor compactions
row.add(summary); // add for major compactions
double indexCacheHitRate =
status.indexCacheHits / (double) Math.max(status.indexCacheRequest, 1);
row.add(indexCacheHitRate);
double dataCacheHitRate =
status.dataCacheHits / (double) Math.max(status.dataCacheRequest, 1);
row.add(dataCacheHitRate);
row.add(status.osLoad);
tServerList.addRow(row);
}
tServerList.generate(req, sb);
}
