long start = System.currentTimeMillis();
ChunkedStorage.newWriter(indexStorage, key, new FileInputStream(compressedIndexFile))
.withConcurrencyLevel(CONCURRENCY).call();
byte[] json = jsonMapper.writeValueAsBytes(segment);
MutationBatch mutation = this.keyspace.prepareMutationBatch();
mutation.withRow(descriptorStorage, key)
.putColumn("lastmodified", System.currentTimeMillis(), null)
.putColumn("descriptor", json, null);
mutation.execute();
log.info("Wrote index to C* in [%s] ms", System.currentTimeMillis() - start);
} catch (Exception e)