You can serialize this object RAMDirectory em disk. When start the application , it read the file .ser and load the object in memory. The time of load of file .ser is much fast. You need change any classes of Lucece: Add the "implements Serialzable" in any classes.
On Nov 27, 2007 4:28 AM, Chhabra, Kapil <[EMAIL PROTECTED]> wrote: > > one can improve search performance by using a RAMDirectory created > from an underlying FSDirectory using one of the parameterised > constructors. Is this correct? > Absolutly > > > Will a FSDirectory not automatically load the index into memory > provided enough RAM is available? > Not all index files are loaded in the RAM if you are using the > FSDirectory. Though at the same time, queries are cached. > > > Do I have to explicitly use a RAMDirectory? > If you want to load the comeplte index in the memory, yes. This increase > the performance a lot as it drastically reduces the number of disk IO. > Obviously at the cost of the RAM. If you have enough RAM available to > accommodate the complete index, you can go ahead with this. > > Regards, > kapilChhabra > > -----Original Message----- > From: Hardy Ferentschik [mailto:[EMAIL PROTECTED] > Sent: Tuesday, November 27, 2007 12:25 PM > To: java-user@lucene.apache.org > Subject: RAMDirectory vs FSDirectory > > Hi there, > > I am using currently a FSDirectory to build my index. The reason for > using a file system based index is that a full index rebuild takes > around 30 minutes and I want to keep a persistent index. > In 'Lucene in Action' I've read that one can improve search performance > by using a RAMDirectory created from an underlying FSDirectory using one > of the parameterised constructors. Is this correct? Will a FSDirectory > not automatically load the index into memory provided enough RAM is > available? > Do I have to explicitly use a RAMDirectory? > > --Hardy > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
