OutOfMemoryException when ingesting large files
Currently there seems to be a bug, which creates OutOfMemoryExceptions when ingesting files that are larger than available heap space with certain infinispan configurations (e.g. LevelDB). It seems like this is an issue with the Modeshape project which has been reported at: https://issues.jboss.org/browse/MODE-2103
The following TestCase can be used to reproduce the issue: https://github.com/futures/large-files-test
Workaround
You will need a large heap size for this to work (e.g. -Xmx2048g)
Currently the only known workaround is using a _file_ configuration for infinspan caches e.g.: https://github.com/futures/fcrepo4/blob/34aab66bc26edfca3a4cbabecc4870bfd81f05da/fcrepo-http-commons/src/main/resources/config/single-file/repository.json.
This can be done by setting the following property:
-Dfcrepo.modeshape.configuration=config/single-file/repository.json
Large Files on a Single Node Fedora 4 Installation
Use config: CATALINA_OPTS="-Dfcrepo.modeshape.configuration=classpath:/config/single-file/repository.json" bin/catalina.sh run
Using the single-file configuration ingest and retrieval of files up to the size of 300 GB using Fedora 4's REST API were tested successfully. The files were ingested sequentially, retrieved and a bitwise comparison with the original data has been performed. Larger sizes have not been tested, due to HDD size limitations.
Large File Upload/Download Roundtrip Tests
- Platform: lib-devsandbox1.ucsd.edu (all data on NAS to handle large files)
- Repository Profile: Minimal
- Workflow Profile: Upload/Download Roundtrip
| File Size | Upload | Download |
|---|---|---|
| 256GB | 15,488,156ms (16.9MB/sec) | 3,306,756ms (79.3MB/sec) |
| 512GB |
Federated Content Large File Download Roundtrip Tests
- Platform: Linux 3.12.1-1-ARCH #1 SMP PREEMPT x86_64 GNU/Linux
Repository Profile: Single-File with an additional external Resource:
"externalSources" : {"home-directory" : {"classname" : "org.modeshape.connector.filesystem.FileSystemConnector","directoryPath" : "/tmp/projection","projections" : [ "default:/projection => /" ],"readOnly" : true,"addMimeTypeMixin" : true}}
| File Size | Projection Directory Request Duration | First Projected Node Request Duration | Download Duration | Throughput |
|---|---|---|---|---|
| 2 GB | 0m35.117s | 0m34.572s | 0m8.236s | 248.66 mb/sec |
| 10 GB | ||||
100 GB |
| |||
| 300 GB | ||||
| 10*10 GB |
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