Apache Accumulo Batch Writing and Scanning Example

This is an example of how to use the BatchWriter and BatchScanner.

This tutorial uses the following Java classes.

SequentialBatchWriter.java - writes mutations with sequential rows and random values
RandomBatchScanner.java - reads random rows and verifies their values

Run SequentialBatchWriter to add 10000 entries with random 50 bytes values to Accumulo.

$ ./bin/runex client.SequentialBatchWriter

Verify data was ingested by scanning the table using the Accumulo shell:

$ accumulo shell
root@instance> table batch
root@instance batch> scan

Run RandomBatchScanner to perform 1000 random queries and verify the results.

$ ./bin/runex client.RandomBatchScanner
16:04:05,950 [examples.client.RandomBatchScanner] INFO : Generating 1000 random ranges for BatchScanner to read
16:04:06,020 [examples.client.RandomBatchScanner] INFO : Reading ranges using BatchScanner
16:04:06,283 [examples.client.RandomBatchScanner] TRACE: 100 lookups
16:04:06,290 [examples.client.RandomBatchScanner] TRACE: 200 lookups
16:04:06,294 [examples.client.RandomBatchScanner] TRACE: 300 lookups
16:04:06,297 [examples.client.RandomBatchScanner] TRACE: 400 lookups
16:04:06,301 [examples.client.RandomBatchScanner] TRACE: 500 lookups
16:04:06,304 [examples.client.RandomBatchScanner] TRACE: 600 lookups
16:04:06,307 [examples.client.RandomBatchScanner] TRACE: 700 lookups
16:04:06,309 [examples.client.RandomBatchScanner] TRACE: 800 lookups
16:04:06,316 [examples.client.RandomBatchScanner] TRACE: 900 lookups
16:04:06,320 [examples.client.RandomBatchScanner] TRACE: 1000 lookups
16:04:06,330 [examples.client.RandomBatchScanner] INFO : Scan finished! 3246.75 lookups/sec, 0.31 secs, 1000 results
16:04:06,331 [examples.client.RandomBatchScanner] INFO : All expected rows were scanned