DanielZhu58 commented on code in PR #5950:
URL: https://github.com/apache/hive/pull/5950#discussion_r2443574514
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/Msck.java:
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@@ -240,6 +246,76 @@ public int repair(MsckInfo msckInfo) throws TException,
MetastoreException, IOEx
}
}
+ // Generate small files warnings only for partsNotInMs
+ try {
+ // Threshold in bytes for average file size considered "small"
+ final long threshold =
+ MetastoreConf.getLongVar(getConf(),
MetastoreConf.ConfVars.MSCK_SMALLFILES_AVG_SIZE);
+
+ // Collect partition names
+ final List<String> names = new ArrayList<>(partsNotInMs.size());
+ for (CheckResult.PartitionResult pr : partsNotInMs) {
+ final String name = pr.getPartitionName();
+ if (name != null && !name.isEmpty()) {
+ names.add(name);
+ }
+ }
+
+ // Batch over the names to limit single-RPC payload.
+ final int BATCH = 1000;
+ final Map<String, Partition> byName = new HashMap<>(names.size() *
2);
+
+ for (int i = 0; i < names.size(); i += BATCH) {
+ final List<String> batch = names.subList(i, Math.min(i + BATCH,
names.size()));
+ final GetPartitionsByNamesRequest req = new
GetPartitionsByNamesRequest(table.getDbName(), table.getTableName());
+ req.setNames(batch);
+
+ // In this branch, getPartitionsByNames returns List<Partition>
+ List<Partition> plist;
+ try {
+ @SuppressWarnings("unchecked")
+ List<Partition> tmp = (List<Partition>)
getMsc().getPartitionsByNames(req);
+ plist = (tmp != null) ? tmp : Collections.emptyList();
+ } catch (NoSuchObjectException e) {
+ plist = Collections.emptyList();
+ }
+
+ for (Partition p : plist) {
+ final String pName =
Warehouse.makePartName(table.getPartitionKeys(), p.getValues());
+ byName.put(pName, p);
+ }
+ }
+
+ // Build small-files stats for partitions that have quick HMS stats.
+ final Map<String, String> smallFilesStats = new TreeMap<>();
+
+ for (String pName : names) {
Review Comment:
They are pretty much the same.
We need to do `smallFilesStats.put(pName, "avgBytes=" + avg + ", partition
total files=" + numFiles + ", totalBytes=" + totalSize);` later, so it's easier
to use pName to iterate.
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