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ASF GitHub Bot logged work on BEAM-3446: ---------------------------------------- Author: ASF GitHub Bot Created on: 02/Jul/18 13:12 Start Date: 02/Jul/18 13:12 Worklog Time Spent: 10m Work Description: iemejia commented on a change in pull request #5841: Fixes https://issues.apache.org/jira/browse/BEAM-3446. URL: https://github.com/apache/beam/pull/5841#discussion_r199491469 ########## File path: sdks/java/io/redis/src/main/java/org/apache/beam/sdk/io/redis/RedisIO.java ########## @@ -279,28 +290,31 @@ public void processElement(ProcessContext processContext) throws Exception { while (!finished) { ScanResult<String> scanResult = jedis.scan(cursor, scanParams); List<String> keys = scanResult.getResult(); - - Pipeline pipeline = jedis.pipelined(); - if (keys != null) { - for (String key : keys) { - pipeline.get(key); - } - List<Object> values = pipeline.syncAndReturnAll(); - for (int i = 0; i < values.size(); i++) { - processContext.output(KV.of(keys.get(i), (String) values.get(i))); - } + for (String k : keys) { + processContext.output(k); } - cursor = scanResult.getStringCursor(); if ("0".equals(cursor)) { finished = true; } } } + } + /** A {@link DoFn} requesting Redis server to get key/value pairs. */ + private static class ReadFn extends BaseReadFn<KV<String, String>> { - @Teardown - public void teardown() { - jedis.close(); + ReadFn(RedisConnectionConfiguration connectionConfiguration) { + super(connectionConfiguration); + } + + @ProcessElement + public void processElement(ProcessContext processContext) throws Exception { + String key = processContext.element(); + + String value = jedis.get(key); Review comment: As mentioned in the previous PR I am a bit concerned about losing the multiple data request capability, any chance you can work on this with the approach you mentioned based on `MGET` for ReadFn. The simplest approach probably is to do like other IOs and have a default size that can be parametrized via a `withBatchSize` method. WDYT ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 118164) Time Spent: 2.5h (was: 2h 20m) > RedisIO non-prefix read operations > ---------------------------------- > > Key: BEAM-3446 > URL: https://issues.apache.org/jira/browse/BEAM-3446 > Project: Beam > Issue Type: New Feature > Components: io-java-redis > Reporter: Vinay varma > Assignee: Vinay varma > Priority: Major > Time Spent: 2.5h > Remaining Estimate: 0h > > Read operation in RedisIO is for prefix based look ups. While this can be > used for exact key matches as well, the number of operations limits the > through put of the function. > I suggest exposing current readAll operation as readbyprefix and using more > simpler operations for readAll functionality. > ex: > {code:java} > String output = jedis.get(element); > if (output != null) { > processContext.output(KV.of(element, output)); > } > {code} > instead of: > https://github.com/apache/beam/blob/7d240c0bb171af6868f1a6e95196c9dcfc9ac640/sdks/java/io/redis/src/main/java/org/apache/beam/sdk/io/redis/RedisIO.java#L292 -- This message was sent by Atlassian JIRA (v7.6.3#76005)