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Posted to dev@lucene.apache.org by "Grant Ingersoll (JIRA)" <ji...@apache.org> on 2008/01/13 16:12:34 UTC
[jira] Closed: (LUCENE-648) Allow changing of ZIP compression level
for compressed fields
[ https://issues.apache.org/jira/browse/LUCENE-648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Grant Ingersoll closed LUCENE-648.
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> Allow changing of ZIP compression level for compressed fields
> -------------------------------------------------------------
>
> Key: LUCENE-648
> URL: https://issues.apache.org/jira/browse/LUCENE-648
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 1.9, 2.0.0, 2.0.1, 2.1
> Reporter: Michael McCandless
> Priority: Minor
>
> In response to this thread:
> http://www.gossamer-threads.com/lists/lucene/java-user/38810
> I think we should allow changing the compression level used in the call to java.util.zip.Deflator in FieldsWriter.java. Right now it's hardwired to "best":
> compressor.setLevel(Deflater.BEST_COMPRESSION);
> Unfortunately, this can apparently cause the zip library to take a very long time (10 minutes for 4.5 MB in the above thread) and so people may want to change this setting.
> One approach would be to read the default from a Java system property, but, it seems recently (pre 2.0 I think) there was an effort to not rely on Java System properties (many were removed).
> A second approach would be to add static methods (and static class attr) to globally set the compression level?
> A third method would be in document.Field class, eg a setCompressLevel/getCompressLevel? But then every time a document is created with this field you'd have to call setCompressLevel since Lucene doesn't have a global Field schema (like Solr).
> Any other ideas / prefererences for either of these methods?
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