How to use

getBkEnsembleSize

method

in

io.pravega.segmentstore.storage.impl.bookkeeper.BookKeeperConfig

/**
 * Creates a new Ledger in BookKeeper.
 *
 * @return A LedgerHandle for the new ledger.
 * @throws DataLogNotAvailableException If BookKeeper is unavailable or the ledger could not be created because an
 *                                      insufficient number of Bookies are available. The causing exception is wrapped
 *                                      inside it.
 * @throws DurableDataLogException      If another exception occurred. The causing exception is wrapped inside it.
 */
static LedgerHandle create(BookKeeper bookKeeper, BookKeeperConfig config) throws DurableDataLogException {
  try {
    return Exceptions.handleInterruptedCall(() ->
        bookKeeper.createLedger(
            config.getBkEnsembleSize(),
            config.getBkWriteQuorumSize(),
            config.getBkAckQuorumSize(),
            LEDGER_DIGEST_TYPE,
            config.getBKPassword()));
  } catch (BKException.BKNotEnoughBookiesException bkEx) {
    throw new DataLogNotAvailableException("Unable to create new BookKeeper Ledger.", bkEx);
  } catch (BKException bkEx) {
    throw new DurableDataLogException("Unable to create new BookKeeper Ledger.", bkEx);
  }
}

@Test
public void testDefaultValues() {
  BookKeeperConfig cfg = BookKeeperConfig.builder()
      .build();
  Assert.assertEquals("localhost:2181", cfg.getZkAddress());
  Assert.assertEquals(Duration.ofMillis(10000), cfg.getZkSessionTimeout());
  Assert.assertEquals(Duration.ofMillis(10000), cfg.getZkConnectionTimeout());
  Assert.assertEquals("/segmentstore/containers", cfg.getZkMetadataPath());
  Assert.assertEquals(2, cfg.getZkHierarchyDepth());
  Assert.assertEquals(5, cfg.getMaxWriteAttempts());
  Assert.assertEquals(3, cfg.getBkEnsembleSize());
  Assert.assertEquals(2, cfg.getBkAckQuorumSize());
  Assert.assertEquals(3, cfg.getBkWriteQuorumSize());
  Assert.assertEquals(5000, cfg.getBkWriteTimeoutMillis());
  Assert.assertEquals(5000, cfg.getBkReadTimeoutMillis());
  Assert.assertEquals(1024 * 1024 * 1024, cfg.getBkLedgerMaxSize());
  Assert.assertEquals(0, cfg.getBKPassword().length);
  Assert.assertEquals("", cfg.getBkLedgerPath());
  Assert.assertEquals(false, cfg.isTLSEnabled());
  Assert.assertEquals("config/client.truststore.jks", cfg.getTlsTrustStore());
  Assert.assertEquals("", cfg.getTlsTrustStorePasswordPath());
}