Java Code Examples for org.apache.hadoop.hdfs.DistributedFileSystem#getFileBlockLocations()
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org.apache.hadoop.hdfs.DistributedFileSystem#getFileBlockLocations() .
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Example 1
Source File: TestCacheDirectives.java From hadoop with Apache License 2.0 | 5 votes |
private static void checkNumCachedReplicas(final DistributedFileSystem dfs, final List<Path> paths, final int expectedBlocks, final int expectedReplicas) throws Exception { int numCachedBlocks = 0; int numCachedReplicas = 0; for (Path p: paths) { final FileStatus f = dfs.getFileStatus(p); final long len = f.getLen(); final long blockSize = f.getBlockSize(); // round it up to full blocks final long numBlocks = (len + blockSize - 1) / blockSize; BlockLocation[] locs = dfs.getFileBlockLocations(p, 0, len); assertEquals("Unexpected number of block locations for path " + p, numBlocks, locs.length); for (BlockLocation l: locs) { if (l.getCachedHosts().length > 0) { numCachedBlocks++; } numCachedReplicas += l.getCachedHosts().length; } } LOG.info("Found " + numCachedBlocks + " of " + expectedBlocks + " blocks"); LOG.info("Found " + numCachedReplicas + " of " + expectedReplicas + " replicas"); assertEquals("Unexpected number of cached blocks", expectedBlocks, numCachedBlocks); assertEquals("Unexpected number of cached replicas", expectedReplicas, numCachedReplicas); }
Example 2
Source File: TestCacheDirectives.java From big-c with Apache License 2.0 | 5 votes |
private static void checkNumCachedReplicas(final DistributedFileSystem dfs, final List<Path> paths, final int expectedBlocks, final int expectedReplicas) throws Exception { int numCachedBlocks = 0; int numCachedReplicas = 0; for (Path p: paths) { final FileStatus f = dfs.getFileStatus(p); final long len = f.getLen(); final long blockSize = f.getBlockSize(); // round it up to full blocks final long numBlocks = (len + blockSize - 1) / blockSize; BlockLocation[] locs = dfs.getFileBlockLocations(p, 0, len); assertEquals("Unexpected number of block locations for path " + p, numBlocks, locs.length); for (BlockLocation l: locs) { if (l.getCachedHosts().length > 0) { numCachedBlocks++; } numCachedReplicas += l.getCachedHosts().length; } } LOG.info("Found " + numCachedBlocks + " of " + expectedBlocks + " blocks"); LOG.info("Found " + numCachedReplicas + " of " + expectedReplicas + " replicas"); assertEquals("Unexpected number of cached blocks", expectedBlocks, numCachedBlocks); assertEquals("Unexpected number of cached replicas", expectedReplicas, numCachedReplicas); }
Example 3
Source File: RaidShell.java From RDFS with Apache License 2.0 | 5 votes |
void collectFileCorruptBlocksInStripe(final DistributedFileSystem dfs, final RaidInfo raidInfo, final Path filePath, final HashMap<Integer, Integer> corruptBlocksPerStripe) throws IOException { // read conf final int stripeBlocks = raidInfo.codec.stripeLength; // figure out which blocks are missing/corrupted final FileStatus fileStatus = dfs.getFileStatus(filePath); final long blockSize = fileStatus.getBlockSize(); final long fileLength = fileStatus.getLen(); final long fileLengthInBlocks = RaidNode.numBlocks(fileStatus); final long fileStripes = RaidNode.numStripes(fileLengthInBlocks, stripeBlocks); final BlockLocation[] fileBlocks = dfs.getFileBlockLocations(fileStatus, 0, fileLength); // figure out which stripes these corrupted blocks belong to for (BlockLocation fileBlock: fileBlocks) { int blockNo = (int) (fileBlock.getOffset() / blockSize); final int stripe = blockNo / stripeBlocks; if (this.isBlockCorrupt(fileBlock)) { this.incCorruptBlocksPerStripe(corruptBlocksPerStripe, stripe); if (LOG.isDebugEnabled()) { LOG.debug("file " + filePath.toString() + " corrupt in block " + blockNo + "/" + fileLengthInBlocks + ", stripe " + stripe + "/" + fileStripes); } } else { if (LOG.isDebugEnabled()) { LOG.debug("file " + filePath.toString() + " OK in block " + blockNo + "/" + fileLengthInBlocks + ", stripe " + stripe + "/" + fileStripes); } } } checkParityBlocks(filePath, corruptBlocksPerStripe, blockSize, 0, fileStripes, fileStripes, raidInfo); }