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From Ramprakash Ramamoorthy <>
Subject Re: Separating the document dataset and the index dataset
Date Tue, 11 Dec 2012 09:32:23 GMT
On Fri, Dec 7, 2012 at 1:11 PM, Jain Rahul <> wrote:

> If you are using lucene 4.0 and afford to compress your document dataset
> while indexing, it will be a huge savings in terms of disk space and also
> in IO (resulting in indexing throughput).
> In our case, it has helped us a lot as compressed data size was roughly 3
> times less than  of original document data set size.
> You may want to check  the below  link.
> Regards,
> Rahul

Thank you Rahul. That indeed seems promising. Just one doubt, how do I plug
this  CompressingStoredFieldsFormat into my app, as in I tried bundling it
in a codec, but not sure if I am proceeding in the right path. Any pointers
would be of great help!

> -----Original Message-----
> From: Ramprakash Ramamoorthy []
> Sent: 07 December 2012 13:03
> To:
> Subject: Separating the document dataset and the index dataset
> Greetings,
>          We are using lucene in our log analysis tool. We get data around
> 35Gb a day and we have this practice of zipping week old indices and then
> unzip when need arises.
>            Though the compression offers a huge saving with respect to
> disk space, the decompression becomes an overhead. At times it takes around
> 10 minutes (de-compression takes 95% of the time) to search across a month
> long set of logs. We need to unzip fully atleast to get the total count
> from the index.
>            My question is, we are setting Index.Store to true. Is there a
> way where we can split the index dataset and the document dataset. In my
> understanding, if at all separation is possible, the document dataset can
> alone be zipped leaving the index dataset on disk? Will it be tangible to
> do this? Any pointers?
>            Or is adding more disks the only solution? Thanks in advance!
> --
> With Thanks and Regards,
> Ramprakash Ramamoorthy,
> +91 9626975420
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With Thanks and Regards,
Ramprakash Ramamoorthy,
Engineer Trainee,
Zoho Corporation.
+91 9626975420

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