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From "Yonik Seeley" <>
Subject Re: After kill -9 index was corrupt
Date Mon, 11 Sep 2006 13:36:39 GMT
On 9/10/06, Chuck Williams <> wrote:
> Could a kill -9 prevent data from reaching disk for files that were
> previously closed?

No.  After a close() the OS should have all the data... the process
may be killed but the OS will eventually flush all the buffers, etc.
File creation is pretty much always synchronous so I have no idea how
your problem could have happened (missing segment files).  IO error or
something else temporarily filling up the disk?

If you have a power loss or crash, then that *can* cause data loss.
There may be mount options to make more file operations synchronous,
or you could maybe write your own Directory implementation to make
things more synchronous.

-Yonik Solr, the open-source Lucene search server

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