long bucketCacheSize = (long) (bucketCachePercentage < 1 ? mu.getMax()
* bucketCachePercentage : bucketCachePercentage * 1024 * 1024);
boolean combinedWithLru = conf.getBoolean(BUCKET_CACHE_COMBINED_KEY,
DEFAULT_BUCKET_CACHE_COMBINED);
BucketCache bucketCache = null;
if (bucketCacheIOEngineName != null && bucketCacheSize > 0) {
int writerThreads = conf.getInt(BUCKET_CACHE_WRITER_THREADS_KEY,
DEFAULT_BUCKET_CACHE_WRITER_THREADS);
int writerQueueLen = conf.getInt(BUCKET_CACHE_WRITER_QUEUE_KEY,
DEFAULT_BUCKET_CACHE_WRITER_QUEUE);
String persistentPath = conf.get(BUCKET_CACHE_PERSISTENT_PATH_KEY);
float combinedPercentage = conf.getFloat(
BUCKET_CACHE_COMBINED_PERCENTAGE_KEY,
DEFAULT_BUCKET_CACHE_COMBINED_PERCENTAGE);
String[] configuredBucketSizes = conf.getStrings(BUCKET_CACHE_BUCKETS_KEY);
int[] bucketSizes = null;
if (configuredBucketSizes != null) {
bucketSizes = new int[configuredBucketSizes.length];
for (int i = 0; i < configuredBucketSizes.length; i++) {
bucketSizes[i] = Integer.parseInt(configuredBucketSizes[i]);
}
}
if (combinedWithLru) {
lruCacheSize = (long) ((1 - combinedPercentage) * bucketCacheSize);
bucketCacheSize = (long) (combinedPercentage * bucketCacheSize);
}
try {
int ioErrorsTolerationDuration = conf.getInt(
"hbase.bucketcache.ioengine.errors.tolerated.duration",
BucketCache.DEFAULT_ERROR_TOLERATION_DURATION);
bucketCache = new BucketCache(bucketCacheIOEngineName,
bucketCacheSize, blockSize, bucketSizes, writerThreads, writerQueueLen, persistentPath,
ioErrorsTolerationDuration);
} catch (IOException ioex) {
LOG.error("Can't instantiate bucket cache", ioex);
throw new RuntimeException(ioex);