List of usage examples for org.apache.cassandra.io.sstable Descriptor getMetadataSerializer
public IMetadataSerializer getMetadataSerializer()
From source file:com.wenyu.cassandra.tools.SSTableLevelToZero.java
License:Apache License
/** * @param args a list of sstables whose metadata we are changing *///from ww w. j a va 2s . c om public static void main(String[] args) throws IOException { PrintStream out = System.out; if (args.length < 3) { out.println("This command should be run with Cassandra stopped!"); out.println("Usage: sstableleveltozero <keyspace> <columnfamily> <sstablefiles_fullpath>"); System.exit(1); } // TODO several daemon threads will run from here. // So we have to explicitly call System.exit. try { // load keyspace descriptions. DatabaseDescriptor.loadSchemas(); String keyspaceName = args[0]; String columnfamily = args[1]; String sstables = args[2]; Set<String> sstableSet = new HashSet<>(); for (String sstable : sstables.split(",")) { sstable = sstable.trim(); if (sstable.length() == 0) { continue; } sstableSet.add(sstable); } // validate columnfamily if (Schema.instance.getCFMetaData(keyspaceName, columnfamily) == null) { System.err.println("ColumnFamily not found: " + keyspaceName + "/" + columnfamily); System.exit(1); } Keyspace keyspace = Keyspace.openWithoutSSTables(keyspaceName); ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(columnfamily); boolean foundSSTable = false; for (Map.Entry<Descriptor, Set<Component>> sstable : cfs.directories.sstableLister().list() .entrySet()) { if (sstable.getValue().contains(Component.STATS)) { foundSSTable = true; Descriptor descriptor = sstable.getKey(); StatsMetadata metadata = (StatsMetadata) descriptor.getMetadataSerializer() .deserialize(descriptor, MetadataType.STATS); String path = descriptor.filenameFor(Component.DATA); if (metadata.sstableLevel > 0 && sstableSet.contains(path)) { out.println("Changing level from " + metadata.sstableLevel + " to 0 on " + descriptor.filenameFor(Component.DATA)); descriptor.getMetadataSerializer().mutateLevel(descriptor, 0); } else if (metadata.sstableLevel <= 0 && sstableSet.contains(path)) { out.println("Skipped " + descriptor.filenameFor(Component.DATA) + " since it is already on level 0"); } } } if (!foundSSTable) { out.println("Found no sstables, did you give the correct keyspace/columnfamily?"); } } catch (Throwable t) { JVMStabilityInspector.inspectThrowable(t); t.printStackTrace(); System.exit(1); } System.exit(0); }