nfusings.
- 原邮件 -
发件人： Uwe Schindler
收件人： java-user@lucene.apache.org
抄送：
发送日期： 2013年8月7日, 星期三, 1:17 下午
主题: RE: 回复：RE: why lucene not use DirectByteBuffer in NIOFSDirectory
Hi,
1)
ByteBuffer bb=ByteBuffer.wrap(new byte[len]); //bb is HeapByteBuffer
channel.read
ijiang...@aliyun.com [mailto:wangzhijiang...@aliyun.com]
Sent: Wednesday, August 07, 2013 11:36 AM
To: java-user
Subject: 回复：RE: why lucene not use DirectByteBuffer in NIOFSDirectory
Hi Uwe:
Thank you for your detail explaination and I learnt a lot from your
message.
First, the direct
---发件人：Uwe
Schindler发送日期：2013年7月31日
18:18收件人：java-user@lucene.apache.org;wangzhijiang...@yahoo.com.cn;主 题：RE: why
lucene not use DirectByteBuffer in NIOFSDirectory Hi,There is a
misunderstanding: Just by allocating a direct buffer, there is still no
difference to a heap buffer in the workflo
Hi,
There is a misunderstanding: Just by allocating a direct buffer, there is still
no difference to a heap buffer in the workflow!
NIO will read the data from file, copy it to FS cache and then the positional
read() system call (used by NIO) copies the FS cache contents to the direct
buffer,
