第4课:Sphinx增量索引与实时索引

所谓增量索引,就是在创建索引之后,数据表会不断新增数据,对新增部分数据建立索引,不能做到实时更新,和数据表比,有一定的时间延时

增量索引操作步骤
1.创建辅助表  主要是为了记录增量的一些信息
2.为主索引配置数据源
3.在增量索引的数据源中作如下方式的取数据设置,需要注意的是sql_query_pre要和主索引数量相同,不然查询结果不是想要的内容
4.主索引index定义
5.增量索引index定义
例子
index delta:mysql{
    source          = delta
    path            = /usr/local/coreseek/var/data/delta/
    charset_dictpath = /usr/local/etc/
    charset_type    = zh_cn.utf-8
}
6.创建更新所有索引
7.更新增量索引,这部分独立一个脚本
8.合并增量索引到主索引
9.启动sphinx的守护进程searchd
10.用crontab设置每隔多少时间运行7脚本一次,更新索引

由于增量索引使用复杂而且有数据延时,现实场景用的不是很多,主要还是使用实时索引

实时索引是先在sphinx中建立好索引结构,然后在数据表更新的时候,用SphinxQL同步更新对应的索引数据,实现实时同步

实时索引配置文件举例
index Godeye
{
    type			= rt
    rt_mem_limit                = 1024M
    path			= /usr/local/sphinx/var/data/Godeye
    docinfo			= extern
    dict			= keywords
    mlock			= 0
    morphology		        = none
    min_stemming_len	        = 1
    min_word_len		= 1
    html_strip		        = 0

    rt_field = v1
    rt_field = v2
    rt_field = v3
    rt_field = v4
    rt_field = v5
    rt_field = v6
    rt_field = v7
    rt_field = v8
    rt_field = v9
    rt_field = v10

    rt_attr_uint = t1
    rt_attr_uint = t2
    rt_attr_uint = t3
    rt_attr_uint = t4
    rt_attr_uint = t5
    rt_attr_uint = t6
    rt_attr_uint = t7
    rt_attr_uint = t8
    rt_attr_uint = t9
    rt_attr_uint = t10

    charset_table        = A..Z->a..z, _, a..z, U+A8->U+B8, U+B8, U+C0..U+DF->U+E0..U+FF, U+E0..U+FF,\
    U+FF10..U+FF19->0..9, 0..9, U+FF41..U+FF5A->a..z, U+FF21..U+FF3A->a..z,\
    U+00E0..U+00F6, U+00D8..U+00DE->U+00F8..U+00FE, U+00F8..U+00FE, U+0100->U+0101, U+0101,\
    U+0102->U+0103, U+0103, U+0104->U+0105, U+0105, U+0106->U+0107, U+0107, U+0108->U+0109,\
    U+0109, U+010A->U+010B, U+010B, U+010C->U+010D, U+010D, U+010E->U+010F, U+010F,\
    U+0110->U+0111, U+0111, U+0112->U+0113, U+0113, U+0114->U+0115, U+0115,\
    U+0116->U+0117,U+0117, U+0118->U+0119, U+0119, U+011A->U+011B, U+011B, U+011C->U+011D,\
    U+011D,U+011E->U+011F, U+011F, U+0130->U+0131, U+0131, U+0132->U+0133, U+0133,\
    U+0134->U+0135,U+0135, U+0136->U+0137, U+0137, U+0139->U+013A, U+013A, U+013B->U+013C,\
    U+013C,U+013D->U+013E, U+013E, U+013F->U+0140, U+0140, U+0141->U+0142, U+0142,\
    U+0143->U+0144,U+0144, U+0145->U+0146, U+0146, U+0147->U+0148, U+0148, U+014A->U+014B,\
    U+014B,U+014C->U+014D, U+014D, U+014E->U+014F, U+014F, U+0150->U+0151, U+0151,\
    U+0152->U+0153,U+0153, U+0154->U+0155, U+0155, U+0156->U+0157, U+0157, U+0158->U+0159,\
    U+0159,U+015A->U+015B, U+015B, U+015C->U+015D, U+015D, U+015E->U+015F, U+015F,\
    U+0167,U+0168->U+0169, U+0169, U+016A->U+016B, U+016B, U+016C->U+016D, U+016D,\
    U+0160->U+0161,U+0161, U+0162->U+0163, U+0163, U+0164->U+0165, U+0165, U+0166->U+0167,\
    U+016E->U+016F,U+016F, U+0170->U+0171, U+0171, U+0172->U+0173, U+0173, U+0174->U+0175,\
    U+0175,U+0176->U+0177, U+0177, U+0178->U+00FF, U+00FF, U+0179->U+017A, U+017A,\
    U+017B->U+017C,U+017C, U+017D->U+017E, U+017E, U+0410..U+042F->U+0430..U+044F,\
    U+0430..U+044F,U+05D0..U+05EA, U+0531..U+0556->U+0561..U+0586, U+0561..U+0587,\
    U+0621..U+063A, U+01B9,U+01BF, U+0640..U+064A, U+0660..U+0669, U+066E, U+066F,\
    U+0671..U+06D3, U+06F0..U+06FF,U+0904..U+0939, U+0958..U+095F, U+0960..U+0963,\
    U+0966..U+096F, U+097B..U+097F,U+0985..U+09B9, U+09CE, U+09DC..U+09E3, U+09E6..U+09EF,\
    U+0A05..U+0A39, U+0A59..U+0A5E,U+0A66..U+0A6F, U+0A85..U+0AB9, U+0AE0..U+0AE3,\
    U+0AE6..U+0AEF, U+0B05..U+0B39,U+0B5C..U+0B61, U+0B66..U+0B6F, U+0B71, U+0B85..U+0BB9,\
    U+0BE6..U+0BF2, U+0C05..U+0C39,U+0C66..U+0C6F, U+0C85..U+0CB9, U+0CDE..U+0CE3,\
    U+0CE6..U+0CEF, U+0D05..U+0D39, U+0D60,U+0D61, U+0D66..U+0D6F, U+0D85..U+0DC6,\
    U+1900..U+1938, U+1946..U+194F, U+A800..U+A805,U+A807..U+A822, U+0386->U+03B1,\
    U+03AC->U+03B1, U+0388->U+03B5, U+03AD->U+03B5,U+0389->U+03B7, U+03AE->U+03B7,\
    U+038A->U+03B9, U+0390->U+03B9, U+03AA->U+03B9,U+03AF->U+03B9, U+03CA->U+03B9,\
    U+038C->U+03BF, U+03CC->U+03BF, U+038E->U+03C5,U+03AB->U+03C5, U+03B0->U+03C5,\
    U+03CB->U+03C5, U+03CD->U+03C5, U+038F->U+03C9,U+03CE->U+03C9, U+03C2->U+03C3,\
    U+0391..U+03A1->U+03B1..U+03C1,U+03A3..U+03A9->U+03C3..U+03C9, U+03B1..U+03C1,\
    U+03C3..U+03C9, U+0E01..U+0E2E,U+0E30..U+0E3A, U+0E40..U+0E45, U+0E47, U+0E50..U+0E59,\
    U+A000..U+A48F, U+4E00..U+9FBF,U+3400..U+4DBF, U+20000..U+2A6DF, U+F900..U+FAFF,\
    U+2F800..U+2FA1F, U+2E80..U+2EFF,U+2F00..U+2FDF, U+3100..U+312F, U+31A0..U+31BF,\
    U+3040..U+309F, U+30A0..U+30FF,U+31F0..U+31FF, U+AC00..U+D7AF, U+1100..U+11FF,\
    U+3130..U+318F, U+A000..U+A48F,U+A490..U+A4CF
    ngram_chars = U+4E00..U+9FBF, U+3400..U+4DBF, U+20000..U+2A6DF, U+F900..U+FAFF,\
    U+2F800..U+2FA1F, U+2E80..U+2EFF, U+2F00..U+2FDF, U+3100..U+312F, U+31A0..U+31BF,\
    U+3040..U+309F, U+30A0..U+30FF, U+31F0..U+31FF, U+AC00..U+D7AF, U+1100..U+11FF,\
    U+3130..U+318F, U+A000..U+A48F, U+A490..U+A4CF

    min_prefix_len = 0
    min_infix_len  = 1
    ngram_len      = 1
}

'更新实时索引用SPHINXQL,与MYSQL操作神似,下面是例子'
$mysql = new PDO("mysql:host=10.21.168.82;port=9306;dbname=null", "", "");
$sql = "replace into Godeye(id, t1, t2, t3, t4, t5, t6, v1, v2) values (2, 3, 2, 102, 0, 123, 456, 'Godeye','path/godeye.org')";
$stmt = $mysql->prepare($sql);
$res = $stmt->execute();
echo $stmt->rowCount();

简单的说,实时索引就是在你更新mysql或者其他db的时候,更新成功之后,同时更新sphinx索引,保证索引和数据源的实时同步

打赏  如对你有帮助,请我喝杯咖啡吧!