Examples of org.apache.hadoop.hbase.regionserver.HRegion.flushcache()

Package org.apache.hadoop.hbase.regionserver

Class org.apache.hadoop.hbase.regionserver.HRegion

Examples of org.apache.hadoop.hbase.regionserver.HRegion.flushcache()

org.apache.hadoop.hbase.regionserver.HRegion.flushcache()
Flush the cache. When this method is called the cache will be flushed unless:
1. the cache is empty
2. the region is closed.
3. a flush is already in progress
4. writes are disabled
This method may block for some time, so it should not be called from a time-sensitive thread. @return true if cache was flushed @throws IOException general io exceptions @throws DroppedSnapshotException Thrown when replay of hlog is requiredbecause a Snapshot was not properly persisted.

      put.setWriteToWAL(false);
      put.add(COLUMN_NAME, null,  VALUE);
      region.put(put);
      if (i % 10000 == 0) {
        LOG.info("Flushing write #" + i);
        region.flushcache();
      }
    }
    region.close();
    region.getLog().closeAndDelete();
    return region;

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    boolean first = true;
    for (HColumnDescriptor hcd: htd.getFamilies()) {
      addRegionEdits(rowName, hcd.getName(), countPerFamily, this.ee, region, "x");
      if (first ) {
        // If first, so we have at least one family w/ different seqid to rest.
        region.flushcache();
        first = false;
      }
    }
    // Now assert edits made it in.
    final Get g = new Get(rowName);

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    Result result = region.get(g, null);
    assertEquals(countPerFamily * htd.getFamilies().size(),
      result.size());


    // Let us flush the region
    region.flushcache();
    region.close(true);
    wal.close();


    // delete the store files in the second column family to simulate a failure
    // in between the flushcache();

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    Configuration hc = initSplit();
    HRegion region = initHRegion(tableName, getName(), hc,
      CoprocessorImpl.class, families);
    for (int i = 0; i < 3; i++) {
      addContent(region, fam3);
      region.flushcache();
    }
    
    region.compactStores();


    byte [] splitRow = region.checkSplit();

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    assertEquals(startBlockCount, cache.getBlockCount());
    assertEquals(startBlockHits, cache.getStats().getHitCount());
    assertEquals(startBlockMiss, cache.getStats().getMissCount());
    // flush the data
    System.out.println("Flushing cache");
    region.flushcache();
    // expect one more block in cache, no change in hits/misses
    long expectedBlockCount = startBlockCount + 1;
    long expectedBlockHits = startBlockHits;
    long expectedBlockMiss = startBlockMiss;
    assertEquals(expectedBlockCount, cache.getBlockCount());

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    assertEquals(expectedBlockCount, cache.getBlockCount());
    assertEquals(++expectedBlockHits, cache.getStats().getHitCount());
    assertEquals(expectedBlockMiss, cache.getStats().getMissCount());
    // flush, one new block
    System.out.println("Flushing cache");
    region.flushcache();
    assertEquals(++expectedBlockCount, cache.getBlockCount());
    assertEquals(expectedBlockHits, cache.getStats().getHitCount());
    assertEquals(expectedBlockMiss, cache.getStats().getMissCount());
    // compact, net minus on block, two hits, no misses
    System.out.println("Compacting");

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          if (l > 0) {
            // Only meta could have edits at this stage.  Give it another flush
            // clear them.
            assertTrue(regionInfo.isMetaRegion());
            LOG.info(r.toString() + " " + l + ", reflushing");
            r.flushcache();
          }
        }
      }
      size = server.getRegionServerAccounting().getGlobalMemstoreSize();
      assertEquals("Server=" + server.getServerName() + ", i=" + i++, 0, size);

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      put.setDurability(Durability.SKIP_WAL);
      put.add(COLUMN_NAME, null,  VALUE);
      region.put(put);
      if (i % 10000 == 0) {
        LOG.info("Flushing write #" + i);
        region.flushcache();
      }
    }
    HRegion.closeHRegion(region);
    return region;
  }

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    assertEquals(startBlockCount, cache.getBlockCount());
    assertEquals(startBlockHits, cache.getStats().getHitCount());
    assertEquals(startBlockMiss, cache.getStats().getMissCount());
    // flush the data
    System.out.println("Flushing cache");
    region.flushcache();
    // expect one more block in cache, no change in hits/misses
    long expectedBlockCount = startBlockCount + 1;
    long expectedBlockHits = startBlockHits;
    long expectedBlockMiss = startBlockMiss;
    assertEquals(expectedBlockCount, cache.getBlockCount());

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    assertEquals(expectedBlockCount, cache.getBlockCount());
    assertEquals(++expectedBlockHits, cache.getStats().getHitCount());
    assertEquals(expectedBlockMiss, cache.getStats().getMissCount());
    // flush, one new block
    System.out.println("Flushing cache");
    region.flushcache();
    assertEquals(++expectedBlockCount, cache.getBlockCount());
    assertEquals(expectedBlockHits, cache.getStats().getHitCount());
    assertEquals(expectedBlockMiss, cache.getStats().getMissCount());
    // compact, net minus two blocks, two hits, no misses
    System.out.println("Compacting");

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