1.随着网站数据量达到500万条的时候,发现SQL数据库如果使用LIKE语句来查询,总是占用CPU很忙,不管怎么优化,速度还是上不来;
2.经过网上收集资料,HUBBLE.net目前虽然做得不错,但需要配置内存给他,由于服务器4G内存,而且运行了好几个网站,所以考虑采用Lucene.net来做为搜索引擎;
3.虽然本地测试没有问题,但是部署到64位的服务器上还是经过了好几天的折腾,在此都记录一下.
在此记录搜片神器的整个开发过程中遇到的问题和相关的解决方案,希望大家一起交流.
网站采用了最新Lucene.Net.3.0.3版本的代码,然后配置盘古分词来进行.
由于Lucene.Net升级到了3.0.3后接口发生了很大变化,原来好多分词库都不能用了,
.Net下还有一个盘古分词(http://pangusegment.codeplex.com/),但也不支持Lucene.Net 3.0.3,园子里的大哥们修改的项目地址:
https://github.com/JimLiu/Lucene.Net.Analysis.PanGu
下载后里面有DEMO代码进行整合.
由于实时处理数据程序是WINFORM程序,所以需要采用软件代码来实时更新索引数据,这样可控性高一些.
引用头文件
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using
Lucene.Net.Analysis;
using
Lucene.Net.Analysis.Standard;
using
Lucene.Net.Documents;
using
Lucene.Net.Index;
using
Lucene.Net.QueryParsers;
using
Lucene.Net.Search;
using
Lucene.Net.Store;
using
Lucene.Net.Util;
using
PanGu;
using
Lucene.Net.Analysis.PanGu;
using
PanGu.HighLight;
using
FSDirectory = Lucene.Net.Store.FSDirectory;
using
Version = Lucene.Net.Util.Version;
|
创建索引
public static class H31Index
{
private static Analyzer analyzer = new PanGuAnalyzer(); //MMSegAnalyzer //StandardAnalyzer
private static int ONEPAGENUM = 200;
private static string m_indexPath = "";
private static IndexWriter iw = null;
public static void Init(string indexpath)
{
m_indexPath = indexpath;
}
public static bool OpenIndex()
{
try
{
DirectoryInfo INDEX_DIR = new DirectoryInfo(m_indexPath+"//Index");
bool iscreate = true;
if (INDEX_DIR.Exists)
iscreate = false;
Int32 time21 = System.Environment.TickCount;
if (iw == null)
{
iw = new IndexWriter(FSDirectory.Open(INDEX_DIR), analyzer, iscreate, new IndexWriter.MaxFieldLength(32));
Int32 time22 = System.Environment.TickCount;
H31Debug.PrintLn("IndexWriter2[" + type.ToString() + "]:" + " IndexWriter:" + (time22 - time21).ToString() + "ms");
return true;
}
}
catch (System.Exception ex)
{
H31Debug.PrintLn("OpenIndex" + ex.Message);
}
return false;
}
public static void CloseIndex()
{
try
{
if (iw != null)
{
//if (count > 0)
{
iw.Commit();
iw.Optimize();
}
iw.Dispose();
iw = null;
}
}
catch (System.Exception ex)
{
H31Debug.PrintLn("CloseIndex" + ex.Message);
}
}
//建立索引
public static int AddIndexFromDB()
{
int res = 0;
int count = 0;
try
{
Int32 time0 = System.Environment.TickCount;
while (count < OneTimeMax && iw != null)
{
Int32 time11 = System.Environment.TickCount;
DataSet ds = H31SQL.GetHashListFromDB(type, startnum, startnum + ONEPAGENUM - 1, NewOrUpdate);
Int32 time12 = System.Environment.TickCount;
int cnt = ds.Tables[0].Rows.Count;
if (ds != null&& cnt>0)
{
Int32 time1 = System.Environment.TickCount;
count = count + cnt;
for (int i = 0; i < cnt; i++)
{
//ID,hashKey,recvTime,updateTime,keyContent,keyType,recvTimes,fileCnt,filetotalSize,Detail,viewTimes,viewLevel
Document doc = new Document();
doc.Add(new Field("ID", ds.Tables[0].Rows[i]["ID"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引
doc.Add(new Field("hashKey", ds.Tables[0].Rows[i]["hashKey"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引
doc.Add(new Field("recvTime", ds.Tables[0].Rows[i]["recvTime"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("updateTime", ds.Tables[0].Rows[i]["updateTime"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引
doc.Add(new Field("keyContent", ds.Tables[0].Rows[i]["keyContent"].ToString(), Field.Store.YES, Field.Index.ANALYZED));//存储,索引
//PanGuFenCiTest(ds.Tables[0].Rows[i]["keyContent"].ToString());
string typeid=ds.Tables[0].Rows[i]["keyType"].ToString();
if(typeid.Length<2)
typeid=type.ToString();
doc.Add(new Field("keyType", typeid, Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("recvTimes", ds.Tables[0].Rows[i]["recvTimes"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引
doc.Add(new Field("fileCnt", ds.Tables[0].Rows[i]["fileCnt"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("filetotalSize", ds.Tables[0].Rows[i]["filetotalSize"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("Detail", ds.Tables[0].Rows[i]["Detail"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("viewTimes", ds.Tables[0].Rows[i]["viewTimes"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
doc.Add(new Field("viewLevel", ds.Tables[0].Rows[i]["viewLevel"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引
iw.AddDocument(doc);
}
ds = null;
Thread.Sleep(10);
}
else
{
res = 1;
break;
}
}
Int32 time10 = System.Environment.TickCount;
H31Debug.PrintLn("AddIndexFromDB[" + type.ToString() + "],Building index done:" + startnum.ToString() + " Time:" + (time10 - time0).ToString() + "ms");
}
catch (System.Exception ex)
{
H31Debug.PrintLn(ex.StackTrace);
}
return res;
}
创建索引代码
public static class H31Index { private static Analyzer analyzer = new PanGuAnalyzer(); //MMSegAnalyzer //StandardAnalyzer private static int ONEPAGENUM = 200; private static string m_indexPath = ""; private static IndexWriter iw = null; public static void Init(string indexpath) { m_indexPath = indexpath; } public static bool OpenIndex() { try { DirectoryInfo INDEX_DIR = new DirectoryInfo(m_indexPath+"//Index"); bool iscreate = true; if (INDEX_DIR.Exists) iscreate = false; Int32 time21 = System.Environment.TickCount; if (iw == null) { iw = new IndexWriter(FSDirectory.Open(INDEX_DIR), analyzer, iscreate, new IndexWriter.MaxFieldLength(32)); Int32 time22 = System.Environment.TickCount; H31Debug.PrintLn("IndexWriter2[" + type.ToString() + "]:" + " IndexWriter:" + (time22 - time21).ToString() + "ms"); return true; } } catch (System.Exception ex) { H31Debug.PrintLn("OpenIndex" + ex.Message); } return false; } public static void CloseIndex() { try { if (iw != null) { //if (count > 0) { iw.Commit(); iw.Optimize(); } iw.Dispose(); iw = null; } } catch (System.Exception ex) { H31Debug.PrintLn("CloseIndex" + ex.Message); } } //建立索引 public static int AddIndexFromDB() { int res = 0; int count = 0; try { Int32 time0 = System.Environment.TickCount; while (count < OneTimeMax && iw != null) { Int32 time11 = System.Environment.TickCount; DataSet ds = H31SQL.GetHashListFromDB(type, startnum, startnum + ONEPAGENUM - 1, NewOrUpdate); Int32 time12 = System.Environment.TickCount; int cnt = ds.Tables[0].Rows.Count; if (ds != null&& cnt>0) { Int32 time1 = System.Environment.TickCount; count = count + cnt; for (int i = 0; i < cnt; i++) { //ID,hashKey,recvTime,updateTime,keyContent,keyType,recvTimes,fileCnt,filetotalSize,Detail,viewTimes,viewLevel Document doc = new Document(); doc.Add(new Field("ID", ds.Tables[0].Rows[i]["ID"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引 doc.Add(new Field("hashKey", ds.Tables[0].Rows[i]["hashKey"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引 doc.Add(new Field("recvTime", ds.Tables[0].Rows[i]["recvTime"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("updateTime", ds.Tables[0].Rows[i]["updateTime"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引 doc.Add(new Field("keyContent", ds.Tables[0].Rows[i]["keyContent"].ToString(), Field.Store.YES, Field.Index.ANALYZED));//存储,索引 //PanGuFenCiTest(ds.Tables[0].Rows[i]["keyContent"].ToString()); string typeid=ds.Tables[0].Rows[i]["keyType"].ToString(); if(typeid.Length<2) typeid=type.ToString(); doc.Add(new Field("keyType", typeid, Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("recvTimes", ds.Tables[0].Rows[i]["recvTimes"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));//存储,索引 doc.Add(new Field("fileCnt", ds.Tables[0].Rows[i]["fileCnt"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("filetotalSize", ds.Tables[0].Rows[i]["filetotalSize"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("Detail", ds.Tables[0].Rows[i]["Detail"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("viewTimes", ds.Tables[0].Rows[i]["viewTimes"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 doc.Add(new Field("viewLevel", ds.Tables[0].Rows[i]["viewLevel"].ToString(), Field.Store.YES, Field.Index.NO));//存储,不索引 iw.AddDocument(doc); } ds = null; Thread.Sleep(10); } else { res = 1; break; } } Int32 time10 = System.Environment.TickCount; H31Debug.PrintLn("AddIndexFromDB[" + type.ToString() + "],Building index done:" + startnum.ToString() + " Time:" + (time10 - time0).ToString() + "ms"); } catch (System.Exception ex) { H31Debug.PrintLn(ex.StackTrace); } return res; }
查询代码
//网站搜索代码 public static void Search(string keyword,int typeid,int pageNo) { int onePage=20;//一页多少 int TotalNum=1000;//一次加载多少 if (pageNo < 0) pageNo = 0; if (pageNo * onePage > TotalNum) pageNo = TotalNum / onePage; //索引加载的目录 DirectoryInfo INDEX_DIR = new DirectoryInfo(m_indexPath+"//Index//index1"); IndexSearcher searcher = new IndexSearcher(FSDirectory.Open(INDEX_DIR), true); QueryParser qp = new QueryParser(Version.LUCENE_30, "keyContent", analyzer); Query query = qp.Parse(keyword); //Console.WriteLine("query> {0}", query); //设置排序问题 Sort sort = new Sort(new SortField[]{new SortField("recvTimes", SortField.INT, true),new SortField("updateTime", SortField.STRING, true)}); //设置高亮显示的问题 PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=\"red\">", "</font>"); PanGu.HighLight.Highlighter highlighter =new PanGu.HighLight.Highlighter(simpleHTMLFormatter,new Segment()); highlighter.FragmentSize = 50; TopFieldDocs tds = searcher.Search(query,null, 1000, sort); Console.WriteLine("TotalHits: " + tds.TotalHits); /* 计算显示的条目 */ int count = tds.ScoreDocs.Length; int start = (pageNo - 1) * onePage; int end = pageNo * onePage > count ? count : pageNo * onePage; //返回集合列表 for (int i = start; i < end; i++) { Document doc = searcher.Doc(tds.ScoreDocs[i].Doc); string contentResult = highlighter.GetBestFragment(keyword, doc.Get("keyContent").ToString()); Console.WriteLine(contentResult + ">>" + doc.Get("recvTimes") + "<<" + doc.Get("updateTime")); } searcher.Dispose(); }
当你觉得本地都运行的好好的时候,发现到服务器上根本就运行不了,一直报错.
由于Lucene.net最新版本直接使用了net4.0,服务器是64们的WIN2003,而且运行的网站都还是32位的net2.0的DLL,所以升级到4.0怎么也出不来
1.运行显示的错误是提示没有.net4.0的框架,需要注册.net4.0
直接到网上找如何搞定显示ASP.NET选项卡的问题,最后找到文章方法是:
停止iis直接删除C:/WINDOWS/system32/inetsrv/MetaBase.xml中的Enable32BitAppOnWin64="TRUE" 行
重启IIS后选项卡到是出来了,但net.2.0的网站全部挂掉,运行不起来,http://h31bt.com网站也运行不起来,
Enable32BitAppOnWin64的意思是允许运行32们的程序,所以此方法不行.
2.另外找的文章都是重新注册net 4.0
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
开始执行试了好多次,没有效果,这里也允许了,重新安装了好几次Net4.0.
3.最后一次在停止IIS后,再次全部注册net2.0,4.0,然后
cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1
重启IIS后,出现的错误终于不再是上面的.
新错误是:
Server Application Unavailable
4.通过网上查找资料
解决办法: 在IIS中新建一个应用程序池,然后选中你的 基于.net
framework4.0的虚拟目录,点“属性”-》在“应用程序池” 中选择刚才新建的的应用程序池,点击“确定”。
最后服务器网站http://h31bt.com终于运行起来了.
1.经过目前测试,目前服务器4G的内存搜索速度比以前需要5S左右的LIKE强了很多倍,基本上都在1S以内;
2.由于Lucene索引是基于文件的索引,从而使SQL数据库的使用压力减轻不少,这样给其它程序的整体压力减少不少,网站效果还行.
3.目前500万的数据重新建立一次索引需要1小时左右,但是网站运行的时候去更新索引速度目前感觉比较慢.比如要更新点击次数和更新时间等时,发现新的问题来了,这块的时间比较长.
4.目前考虑的方案是几天一次全部重新建立索引一次,平时只是添加数据.
希望有了解的朋友在此留言指教下lucene.net方面的性能优化问题,大家一起共同学习进步.
大家看累了,就移步到娱乐区http://h31bt.com 去看看速度如何,休息下...
希望大家多多推荐哦...大家的推荐才是下一篇介绍的动力...