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| From | Ravikumar Govindarajan <ravikumar.govindara...@gmail.com> |
| Subject | Segment Merges and madvise |
| Date | Thu, 06 Dec 2012 13:22:10 GMT |
I went through the blog at http://blog.mikemccandless.com/2010/06/lucene-and-fadvisemadvise.html for a detailed description on segment merge effects on IO Cache. As the comment section clarifies, SEQUENTIAL advise has been implemented correctly from kernel 2.6.29 upwards. But we don't have the SEQUENTIAL impl, only the O_DIRECT impl. Can newer kernel versions use SEQUENTIAL for lucene segment merges? Are there other factors in play here, that lucene is not implementing it. -- Ravi | |
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