[GEODE-10] HDFS Integration

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: hdfs
• Assignee: Unassigned
• Reporter: Dan Smith
• Created: 07/May/15 19:56
• Updated: 28/Mar/19 23:17
• Resolved: 28/Mar/19 23:17

Description

Ability to persist data on HDFS had been under development for GemFire. It was part of the latest code drop, GEODE-8. As part of this feature we are proposing some changes to the HdfsStore management API (see attached doc for details).

1. The current API has nested configuration for compaction and async queue. This nested structure forces user to execute multiple steps to manage a store. It also does not seem to be consistent with other management APIs
2. Some member names in current API are confusing

HDFS Integration: Geode as a transactional layer that microbatches data out to Hadoop. This capability makes Geode a NoSQL store that can sit on top of Hadoop and parallelize the process of moving data from the in memory tier into Hadoop, making it very useful for capturing and processing fast data while making it available for Hadoop jobs relatively quickly. The key requirements being met here are

1. Ingest data into HDFS parallely
2. Cache bloom filters and allow fast lookups of individual elements
3. Have programmable policies for deciding what stays in memory
4. Roll files in HDFS
5. Index data that is in memory
6. Have expiration policies that allows the transactional set to decay out older data
7. Solution needs to support replicated and partitioned regions

Issue Links

• links to: Review

Sub-Tasks

• Re-introduce the HDFS unit tests that were disabled before code-drop (GEODE-8) due to failures: Resolved
• RegionWithHDFSPersistenceBasicDUnitTest.testPUTDMLBulkSupport fails intermittently with suspect string: Resolved
• HDFSStore API should be more consistent: Resolved
• RegionWithHDFSPersistenceBasicDUnitTest.testGlobalDestroyFromAccessor fails intermittently: Resolved
• Hadoop integration tests fail under Windows: Resolved
• Failure from RegionWithHDFSOffHeapBasicDUnitTest.testWObasicClose in nightly build: Resolved
• CI failure: RegionWithHDFSBasicDUnitTest.testPUTDMLBulkSupport: Resolved
• CI failure: ColocatedRegionWithHDFSDUnitTest.testGetFromHDFS: Resolved
• CI failure: RegionWithHDFSBasicDUnitTest.testPUTDMLSupport: Resolved
• CI failure: RegionWithHDFSOffHeapBasicDUnitTest.testGetFromHDFS: Resolved
• CI failure: RegionWithHDFSOffHeapBasicDUnitTest.testByteArrays: Resolved
• CI failure: RegionWithHDFSBasicDUnitTest.testGetFromHDFS: Resolved
• CI failure: RegionWithHDFSBasicDUnitTest.testByteArrays: Resolved
• CI failure: RegionWithHDFSOffHeapBasicDUnitTest.testGlobalDestroyWithHDFSData: Resolved
• CI failure: RegionWithHDFSPersistenceBasicDUnitTest.testGetFromHDFS: Resolved
• Failure from RegionWithHDFSPersistenceBasicDUnitTest.testGlobalDestroyWithQueueData: Resolved
• HDFSConfigJUnitTest testHdfsStoreInvalidCompactionConf expected exception logic is incorrect: Closed