Hi, First: I have read before a comment from Doug Cuttling saying that "all index updates are atomic". Is this true? It looks like a bunch of files are manipulated and in the end a rename of a file is done, which "commits" the operation. If the operation is interrupted before it is commited then it is just lost completely (and if any new files were created they will be just silently overwritten). This makes the operations atomic.
Am I correct about this? Second: in FSDirectory.renameFile() there is a comment saying this operation should be atomic. And that it is NOT currently atomic because its implemented by a delete followed by a rename or copy INSTEAD of just a simple rename (which is atomic in most file systems). It looks as if 1. there is a "segments.new" that is created and 2. it is renamed to "segments" (or deleted and copied). Now, if there is a crash between the file being deleted and copied... a comment says "we are screwed up". But what does screw up mean? Why isnt the standard "crash recovery" just rename the segments.new file? I mean, why not doing the following: if there is a "segments", do nothing. if there is no "segments" but there is a "segments.new" then rename it to "segments". Thanks! Christian Rodriguez --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
