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https://issues.apache.org/jira/browse/JCLOUDS-1488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17679526#comment-17679526
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ASF subversion and git services commented on JCLOUDS-1488:
----------------------------------------------------------
Commit e478dd5452d70a5ea2082337b05ad91f331f0eb6 in jclouds's branch
refs/heads/master from Andrew Gaul
[ https://gitbox.apache.org/repos/asf?p=jclouds.git;h=e478dd5452 ]
JCLOUDS-1371: JCLOUDS-1488: optimize fs prefix
This reduces the number of stat calls required when prefix is deep in the
filesystem hierarchy. Further optimizations to delimiter are possible.
References gaul/s3proxy#473.
> Filesystem list call with prefix is slow in large containers
> ------------------------------------------------------------
>
> Key: JCLOUDS-1488
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1488
> Project: jclouds
> Issue Type: Bug
> Components: jclouds-blobstore
> Affects Versions: 2.1.1
> Environment: Java version: java version "1.8.0_131"
> Operating system: Fedora 27 x86_64
> Reporter: Lari Sinisalo
> Assignee: Andrew Gaul
> Priority: Major
> Labels: filesystem
> Fix For: 2.2.0, 2.1.2
>
> Attachments: JCLOUDS1488.java
>
>
> When the filesystem blobstore is used, running the following code takes very
> long if there are a lot of files in the container:
> {code:java}
> ListContainerOptions options = new ListContainerOptions();
> options.prefix("test-container-subdirectory/");
> Set<? extends StorageMetadata> results =
> blobStore.list("test-container",options);
> {code}
> See the attached Java source file [^JCLOUDS1488.java] for the full code.
> On my system, running the attached Java code takes over 10 seconds to list a
> single file if there are 500,000 files in the container outside that prefix.
> Output from the attached code:
> {code:java}
> Number of blobs listed: 1
> First listed blob: test-container-subdirectory/file-to-list
> Time it took to list the blobs: 13256 ms
> {code}
> A more general version of this problem was reported previously in
> JCLOUDS-1371.
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