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Date: Sat, 6 Feb 2010 08:10:28 +0000 (UTC)
From: =?utf-8?Q?Juhani_R=C3=A4nkimies_=28JIRA=29?= <jira@apache.org>
To: dev@couchdb.apache.org
Subject: [jira] Commented: (COUCHDB-86) (CouchDB on Windows) compaction can
 not be done.
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    [ https://issues.apache.org/jira/browse/COUCHDB-86?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1283=
0493#action_12830493 ]=20

Juhani R=C3=A4nkimies commented on COUCHDB-86:
-----------------------------------------

On windows file:rename(Source, Dest) fails if either Source or Dest is open=
ed. I don't know if win32 api has something that would alleviate that.

That means, that on window the rename operation must be of form
file:close
file:rename
file:open

couch_file is the right place for that, I think.

The advantage of numbering the database files is that it requires one less =
synchronous close (for X.couch).

> (CouchDB on Windows) compaction can not be done.
> ------------------------------------------------
>
>                 Key: COUCHDB-86
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-86
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Build System
>    Affects Versions: 0.8
>         Environment: Windows XP,    Erlang/OTP R12B-3
>            Reporter: Li Zhengji
>            Assignee: Paul Joseph Davis
>            Priority: Blocker
>             Fix For: 1.0
>
>   Original Estimate: 5h
>  Remaining Estimate: 5h
>
> During compacting, rename the current DB file to a .old file is not allow=
ed on Windows.
> A possible workaround for this could be:=20
> 1. Close current DB file (.couch);
> 2. Send db_updated to update to use .compact;
> 3. After 5sec, delete the .couch file;  ---- This is done in a linked pro=
cess, after that, this process send a message to update_loop;
> 4. After received the message in update_loop, close current DB file which=
 is a .compact file, then rename it to .couch;
> 5. Finally, db_updated again to use this new .couch file.
> Maybe, there would be a "pause" in service?

--=20
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