delete a record

[Hasan Gharehasanloo]

Hi everybody

I am investigating on CBLite storage consumption in android applications. I found out that after delete a document or even all records in application by delete() function of document, the size of *.cblite file increase. I guess that it is some sort of soft deleting. Is there any solution to delete a document completely and in a way that decrease *.cblite file size?

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Best Regards

Hasan Gharehasanloo

Front-end Web Developer

Email: h_g...@yahoo.com
Cell: (0098) 912-462-4557
LinkedIn: linkedin.com/fa/hghare

[Jens Alfke]

On Feb 24, 2014, at 10:38 PM, Hasan Gharehasanloo <hasan...@gmail.com> wrote:

I am investigating on CBLite storage consumption in android applications. I found out that after delete a document or even all records in application by delete() function of document, the size of *.cblite file increase. I guess that it is some sort of soft deleting. Is there any solution to delete a document completely and in a way that decrease *.cblite file size?

Compacting the database will get rid of most of the space taken up by a deleted document.

If you want to completely get rid of all traces of a document, use purgeDocument.

—Jens

[Hasan Gharehasanloo]

Thanks Jens

How to compact database?

And what is the use of traces of deleted document? I mean how to use them?

------------------------------------------------
Best Regards

Hasan Gharehasanloo

Front-end Web Developer

Email: h_g...@yahoo.com
Cell: (0098) 912-462-4557
LinkedIn: linkedin.com/fa/hghare

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[Jens Alfke]

On Feb 24, 2014, at 10:50 PM, Hasan Gharehasanloo <hasan...@gmail.com> wrote:

How to compact database?

There should be a ‘compact’ method on the Database class. (I’m not very familiar with the Android/Java API.)

And what is the use of traces of deleted document? I mean how to use them?

For replication — If there were no trace left of a deleted document, then if you replicated from another database that contained that document, it would reappear. The deletion is a permanent record that you deleted the doc. And if you replicate to another database, the deletion will propagate.

(The details: deleting a document is really just adding a new revision whose contents consist only of a “_deleted”:true property.)

—Jens

[Traun Leyden]

On Mon, Feb 24, 2014 at 10:53 PM, Jens Alfke <je...@couchbase.com> wrote:

There should be a ‘compact’ method on the Database class. (I’m not very familiar with the Android/Java API.)

Yup, there is.  Here is a link to the javadocs -- see the Database class and scroll down to see the compact() method.

 

And what is the use of traces of deleted document? I mean how to use them?

For replication — If there were no trace left of a deleted document, then if you replicated from another database that contained that document, it would reappear. The deletion is a permanent record that you deleted the doc. And if you replicate to another database, the deletion will propagate.

(The details: deleting a document is really just adding a new revision whose contents consist only of a “_deleted”:true property.)

—Jens

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