Suricata产生的数据存储目录
不多说，直接上干货！
我这里呢，分两种常用的Suricata。
一、源码编译安装的Suricata
这里不多说，大家可以去看我下面写的博客
使用 Suricata 进行入侵监控（一个简单小例子访问百度）
[root@suricata suricata]# ls
certs eve.json fast.log files stats.log suricata.log
[root@suricata suricata]# cat suricata.log
9/8/2017 -- 21:13:33 - <Notice> - This is Suricata version 3.1 RELEASE
9/8/2017 -- 21:13:42 - <Warning> - [ERRCODE: SC_ERR_NO_RULES(42)] - No rule files match the pattern /etc/suricata/rules/tls-events.rules
9/8/2017 -- 21:13:42 - <Warning> - [ERRCODE: SC_ERR_NO_RULES(42)] - No rule files match the pattern /etc/suricata/rules/test.rules
9/8/2017 -- 21:13:42 - <Error> - [ERRCODE: SC_ERR_NO_RULES(42)] - No rules loaded from /etc/suricata/rules/test.rules
9/8/2017 -- 21:13:49 - <Notice> - all 1 packet processing threads, 4 management threads initialized, engine started.
9/8/2017 -- 21:19:41 - <Notice> - Signal Received. Stopping engine.
9/8/2017 -- 21:19:41 - <Notice> - Stats for 'eth0': pkts: 11525, drop: 0 (0.00%), invalid chksum: 0
[root@suricata suricata]# pwd
/var/log/suricata
[root@suricata suricata]#
二、SELKS里的Suricata
root@SELKS:/var/log/suricata# pwd
/var/log/suricata
root@SELKS:/var/log/suricata# ll
total
drwxr-xr-x logstash logstash Jul : certs
drwxr-xr-x logstash logstash Jul : core
-rw-r----- logstash logstash Aug : eve.json
-rw-r----- logstash logstash Aug : fast.log
drwxr-xr-x logstash logstash Jul : files
drwxr-xr-x logstash logstash Jul : StatsByDate
-rw-r----- logstash logstash Aug : stats.log
-rw-r--r-- root root Aug : suricata.log
-rw-r--r-- root root Aug : suricata-start.log
root@SELKS:/var/log/suricata#
这里，建议大家如我这样，先保留一份默认的权限。免得以后自己修改后了，返回去会有权限问题。
好比，我这里想把eve.json下载下来，查看。
最好比如这里eve.json本来的权限是640，则可建议先chmod 777 eve.json，用完之后，再640回去即可。
{"timestamp":"2017-08-17T16:32:04.007125+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"192.168.1.110","dest_port":,"proto":"TCP","app_proto":"tls","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:30:52.309149+0800","end":"2017-08-17T16:31:02.250921+0800","age":,"state":"closed","reason":"timeout","alerted":false},"tcp":{"tcp_flags":"1b","tcp_flags_ts":"1b","tcp_flags_tc":"1b","syn":true,"fin":true,"psh":true,"ack":true,"state":"closed"}}
{"timestamp":"2017-08-17T16:32:04.007306+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"192.168.1.110","dest_port":,"proto":"TCP","app_proto":"tls","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:30:52.311506+0800","end":"2017-08-17T16:31:02.250232+0800","age":,"state":"closed","reason":"timeout","alerted":false},"tcp":{"tcp_flags":"1b","tcp_flags_ts":"1b","tcp_flags_tc":"1b","syn":true,"fin":true,"psh":true,"ack":true,"state":"closed"}}
{"timestamp":"2017-08-17T16:32:04.007491+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"192.168.1.110","dest_port":,"proto":"TCP","app_proto":"tls","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:30:52.311506+0800","end":"2017-08-17T16:31:02.250232+0800","age":,"state":"closed","reason":"timeout","alerted":false},"tcp":{"tcp_flags":"1b","tcp_flags_ts":"1b","tcp_flags_tc":"1b","syn":true,"fin":true,"psh":true,"ack":true,"state":"closed"}}
{"timestamp":"2017-08-17T16:32:05.056241+0800","flow_id":,"in_iface":"enp0s3","event_type":"http","src_ip":"192.168.1.106","src_port":,"dest_ip":"121.14.88.17","dest_port":,"proto":"TCP","tx_id":,"http":{"hostname":"121.14.88.17","url":"\/gchatpic_new\/4178047381\/4178047381-2618102286-9FB3C79268791082715EA1BC1E0E710B\/0?vuin=1138410364&term=1&srvver=26719&rf=naio","http_user_agent":"Mozilla\/4.0 (compatible; MSIE 6.0; Windows NT 5.1)","accept":"*\/*","accept_encoding":"gzip, deflate","cache_control":"no-cache","http_refer":"http:\/\/im.qq.com","http_method":"GET","protocol":"HTTP\/1.1","length":}}
{"timestamp":"2017-08-17T16:32:05.102122+0800","flow_id":,"in_iface":"enp0s3","event_type":"http","src_ip":"192.168.1.106","src_port":,"dest_ip":"121.14.88.53","dest_port":,"proto":"TCP","tx_id":,"http":{"hostname":"121.14.88.53","url":"\/gchatpic_new\/4178047381\/4178047381-2618102286-9FB3C79268791082715EA1BC1E0E710B\/0?vuin=1138410364&term=1&srvver=26719&rf=naio","http_user_agent":"Mozilla\/4.0 (compatible; MSIE 6.0; Windows NT 5.1)","http_content_type":"image\/jpeg","accept":"*\/*","accept_encoding":"gzip, deflate","cache_control":"no-cache","connection":"keep-alive","content_length":"","content_type":"image\/jpeg","last_modified":"Thu, 17 Aug 2017 16:31:00 GMT","server":"ImgHttp3.0.0","http_refer":"http:\/\/im.qq.com","http_method":"GET","protocol":"HTTP\/1.1","status":,"length":}}
{"timestamp":"2017-08-17T16:32:06.004897+0800","flow_id":,"event_type":"flow","src_ip":"fe80:0000:0000:0000:39ab:5a7f:5970:65bd","src_port":,"dest_ip":"ff02:0000:0000:0000:0000:0000:0001:0003","dest_port":,"proto":"UDP","app_proto":"failed","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:31:35.446457+0800","end":"2017-08-17T16:31:35.547314+0800","age":,"state":"new","reason":"timeout","alerted":false}}
{"timestamp":"2017-08-17T16:32:06.005310+0800","flow_id":,"event_type":"flow","src_ip":"fe80:0000:0000:0000:39ab:5a7f:5970:65bd","src_port":,"dest_ip":"ff02:0000:0000:0000:0000:0000:0001:0003","dest_port":,"proto":"UDP","app_proto":"failed","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:31:35.446457+0800","end":"2017-08-17T16:31:35.547314+0800","age":,"state":"new","reason":"timeout","alerted":false}}
{"timestamp":"2017-08-17T16:32:07.001918+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"119.29.29.29","dest_port":,"proto":"UDP","app_proto":"dns","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:27:06.957002+0800","end":"2017-08-17T16:27:06.983538+0800","age":,"state":"established","reason":"timeout","alerted":false}}
{"timestamp":"2017-08-17T16:32:07.002123+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"119.29.29.29","dest_port":,"proto":"UDP","app_proto":"dns","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:27:06.957002+0800","end":"2017-08-17T16:27:06.983538+0800","age":,"state":"established","reason":"timeout","alerted":false}}
{"timestamp":"2017-08-17T16:32:08.000546+0800","event_type":"stats","stats":{"uptime":,"capture":{"kernel_packets":,"kernel_packets_delta":,"kernel_drops":,"kernel_drops_delta":},"decoder":{"pkts":,"pkts_delta":,"bytes":,"bytes_delta":,"invalid":,"invalid_delta":,"ipv4":,"ipv4_delta":,"ipv6":,"ipv6_delta":,"ethernet":,"ethernet_delta":,"raw":,"raw_delta":,"null":,"null_delta":,"sll":,"sll_delta":,"tcp":,"tcp_delta":,"udp":,"udp_delta":,"sctp":,"sctp_delta":,"icmpv4":,"icmpv4_delta":,"icmpv6":,"icmpv6_delta":,"ppp":,"ppp_delta":,"pppoe":,"pppoe_delta":,"gre":,"gre_delta":,"vlan":,"vlan_delta":,"vlan_qinq":,"vlan_qinq_delta":,"teredo":,"teredo_delta":,"ipv4_in_ipv6":,"ipv4_in_ipv6_delta":,"ipv6_in_ipv6":,"ipv6_in_ipv6_delta":,"mpls":,"mpls_delta":,"avg_pkt_size":,"avg_pkt_size_delta":,"max_pkt_size":,"max_pkt_size_delta":,"erspan":,"erspan_delta":,"ipraw":{"invalid_ip_version":,"invalid_ip_version_delta":},"ltnull":{"pkt_too_small":,"pkt_too_small_delta":,"unsupported_type":,"unsupported_type_delta":},"dce":{"pkt_too_small":,"pkt_too_small_delta":}},"flow":{"memcap":,"memcap_delta":,"tcp":,"tcp_delta":,"udp":,"udp_delta":,"icmpv4":,"icmpv4_delta":,"icmpv6":,"icmpv6_delta":,"spare":,"spare_delta":,"emerg_mode_entered":,"emerg_mode_entered_delta":,"emerg_mode_over":,"emerg_mode_over_delta":,"tcp_reuse":,"tcp_reuse_delta":,"memuse":,"memuse_delta":-},"defrag":{"ipv4":{"fragments":,"fragments_delta":,"reassembled":,"reassembled_delta":,"timeouts":,"timeouts_delta":},"ipv6":{"fragments":,"fragments_delta":,"reassembled":,"reassembled_delta":,"timeouts":,"timeouts_delta":},"max_frag_hits":,"max_frag_hits_delta":},"tcp":{"sessions":,"sessions_delta":,"ssn_memcap_drop":,"ssn_memcap_drop_delta":,"pseudo":,"pseudo_delta":,"pseudo_failed":,"pseudo_failed_delta":,"invalid_checksum":,"invalid_checksum_delta":,"no_flow":,"no_flow_delta":,"syn":,"syn_delta":,"synack":,"synack_delta":,"rst":,"rst_delta":,"segment_memcap_drop":,"segment_memcap_drop_delta":,"stream_depth_reached":,"stream_depth_reached_delta":,"reassembly_gap":,"reassembly_gap_delta":,"overlap":,"overlap_delta":,"overlap_diff_data":,"overlap_diff_data_delta":,"insert_data_normal_fail":,"insert_data_normal_fail_delta":,"insert_data_overlap_fail":,"insert_data_overlap_fail_delta":,"insert_list_fail":,"insert_list_fail_delta":,"memuse":,"memuse_delta":,"reassembly_memuse":,"reassembly_memuse_delta":-},"detect":{"alert":,"alert_delta":},"app_layer":{"flow":{"http":,"http_delta":,"ftp":,"ftp_delta":,"smtp":,"smtp_delta":,"tls":,"tls_delta":,"ssh":,"ssh_delta":,"imap":,"imap_delta":,"msn":,"msn_delta":,"smb":,"smb_delta":,"dcerpc_tcp":,"dcerpc_tcp_delta":,"dns_tcp":,"dns_tcp_delta":,"failed_tcp":,"failed_tcp_delta":,"dcerpc_udp":,"dcerpc_udp_delta":,"dns_udp":,"dns_udp_delta":,"failed_udp":,"failed_udp_delta":},"tx":{"http":,"http_delta":,"ftp":,"ftp_delta":,"smtp":,"smtp_delta":,"tls":,"tls_delta":,"ssh":,"ssh_delta":,"smb":,"smb_delta":,"dcerpc_tcp":,"dcerpc_tcp_delta":,"dns_tcp":,"dns_tcp_delta":,"dcerpc_udp":,"dcerpc_udp_delta":,"dns_udp":,"dns_udp_delta":}},"flow_mgr":{"closed_pruned":,"closed_pruned_delta":,"new_pruned":,"new_pruned_delta":,"est_pruned":,"est_pruned_delta":,"bypassed_pruned":,"bypassed_pruned_delta":,"flows_checked":,"flows_checked_delta":-,"flows_notimeout":,"flows_notimeout_delta":-,"flows_timeout":,"flows_timeout_delta":,"flows_timeout_inuse":,"flows_timeout_inuse_delta":,"flows_removed":,"flows_removed_delta":,"rows_checked":,"rows_checked_delta":,"rows_skipped":,"rows_skipped_delta":,"rows_empty":,"rows_empty_delta":,"rows_busy":,"rows_busy_delta":,"rows_maxlen":,"rows_maxlen_delta":},"file_store":{"open_files":,"open_files_delta":},"dns":{"memuse":,"memuse_delta":-,"memcap_state":,"memcap_state_delta":,"memcap_global":,"memcap_global_delta":},"http":{"memuse":,"memuse_delta":,"memcap":,"memcap_delta":}}}
{"timestamp":"2017-08-17T16:32:08.006119+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"119.29.29.29","dest_port":,"proto":"UDP","app_proto":"dns","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:27:07.210960+0800","end":"2017-08-17T16:27:07.237152+0800","age":,"state":"established","reason":"timeout","alerted":false}}
{"timestamp":"2017-08-17T16:32:08.006255+0800","flow_id":,"event_type":"flow","src_ip":"192.168.1.106","src_port":,"dest_ip":"119.29.29.29","dest_port":,"proto":"UDP","app_proto":"dns","flow":{"pkts_toserver":,"pkts_toclient":,"bytes_toserver":,"bytes_toclient":,"start":"2017-08-17T16:27:07.210960+0800","end":"2017-08-17T16:27:07.237152+0800","age":,"state":"established","reason":"timeout","alerted":false}}
//-::00.188090 [**] [::] ET MALWARE Suspicious Mozilla User-Agent - Likely Fake (Mozilla/4.0) [**] [Classification: A Network Trojan was Detected] [Priority: ] {TCP} 192.168.1.106: -> 211.159.130.105:
//-::00.312554 [**] [::] ET MALWARE Suspicious Mozilla User-Agent - Likely Fake (Mozilla/4.0) [**] [Classification: A Network Trojan was Detected] [Priority: ] {TCP} 192.168.1.106: -> 211.159.130.105:
//-::35.606046 [**] [::] ET POLICY Outdated Flash Version M1 [**] [Classification: Potential Corporate Privacy Violation] [Priority: ] {TCP} 192.168.1.106: -> 14.18.245.211:
//-::26.198737 [**] [::] ET POLICY HTTP traffic on port (POST) [**] [Classification: Potentially Bad Traffic] [Priority: ] {TCP} 192.168.1.106: -> 183.3.235.188:
//-::01.181590 [**] [::] ET POLICY Outdated Flash Version M1 [**] [Classification: Potential Corporate Privacy Violation] [Priority: ] {TCP} 192.168.1.106: -> 14.18.245.211:
//-::51.709411 [**] [::] ET POLICY HTTP traffic on port (POST) [**] [Classification: Potentially Bad Traffic] [Priority: ] {TCP} 192.168.1.106: -> 183.3.235.188:
//-::53.182341 [**] [::] ET POLICY Outdated Flash Version M1 [**] [Classification: Potential Corporate Privacy Violation] [Priority: ] {TCP} 192.168.1.106: -> 14.18.245.211:
//-::34.097124 [**] [::] ET POLICY HTTP traffic on port (POST) [**] [Classification: Potentially Bad Traffic] [Priority: ] {TCP} 192.168.1.106: -> 183.3.235.188:
//-::41.476584 [**] [::] ET POLICY Outdated Flash Version M1 [**] [Classification: Potential Corporate Privacy Violation] [Priority: ] {TCP} 192.168.1.106: -> 14.18.245.211:
//-::41.476584 [**] [::] ET POLICY Outdated Flash Version M1 [**] [Classification: Potential Corporate Privacy Violation] [Priority: ] {TCP} 192.168.1.106: -> 14.18.245.211:
//-::25.114492 [**] [::] ET POLICY HTTP traffic on port (POST) [**] [Classification: Potentially Bad Traffic] [Priority: ] {TCP} 192.168.1.106: -> 183.3.235.188:
//-::25.114492 [**] [::] ET POLICY HTTP traffic on port (POST) [**] [Classification: Potentially Bad Traffic] [Priority: ] {TCP} 192.168.1.106: -> 183.3.235.188:
------------------------------------------------------------------------------------
Date: // -- :: (uptime: 0d, 00h 00m 08s)
------------------------------------------------------------------------------------
Counter | TM Name | Value
------------------------------------------------------------------------------------
capture.kernel_packets | Total |
decoder.pkts | Total |
decoder.bytes | Total |
decoder.ipv4 | Total |
decoder.ethernet | Total |
decoder.tcp | Total |
decoder.udp | Total |
decoder.avg_pkt_size | Total |
decoder.max_pkt_size | Total |
flow.tcp | Total |
flow.udp | Total |
tcp.sessions | Total |
tcp.syn | Total |
tcp.synack | Total |
tcp.rst | Total |
app_layer.flow.tls | Total |
app_layer.flow.failed_udp | Total |
flow.spare | Total |
flow_mgr.rows_checked | Total |
flow_mgr.rows_skipped | Total |
tcp.memuse | Total |
tcp.reassembly_memuse | Total |
dns.memuse | Total |
flow.memuse | Total |
------------------------------------------------------------------------------------
Date: // -- :: (uptime: 0d, 00h 00m 15s)
------------------------------------------------------------------------------------
Counter | TM Name | Value
------------------------------------------------------------------------------------
capture.kernel_packets | Total |
decoder.pkts | Total |
decoder.bytes | Total |
decoder.ipv4 | Total |
decoder.ipv6 | Total |
decoder.ethernet | Total |
decoder.tcp | Total |
decoder.udp | Total |
decoder.icmpv6 | Total |
decoder.avg_pkt_size | Total |
decoder.max_pkt_size | Total |
flow.tcp | Total |
flow.udp | Total |
flow.icmpv6 | Total |
tcp.sessions | Total |
tcp.syn | Total |
tcp.synack | Total |
tcp.rst | Total |
app_layer.flow.http | Total |
app_layer.tx.http | Total |
app_layer.flow.tls | Total |
app_layer.flow.dns_udp | Total |
app_layer.tx.dns_udp | Total |
app_layer.flow.failed_udp | Total |
flow.spare | Total |
flow_mgr.flows_checked | Total |
flow_mgr.flows_notimeout | Total |
flow_mgr.rows_checked | Total |
flow_mgr.rows_skipped | Total |
flow_mgr.rows_maxlen | Total |
tcp.memuse | Total |
tcp.reassembly_memuse | Total |
dns.memuse | Total |
http.memuse | Total |
flow.memuse | Total |
------------------------------------------------------------------------------------
Date: // -- :: (uptime: 0d, 00h 00m 22s)
------------------------------------------------------------------------------------
Counter | TM Name | Value
------------------------------------------------------------------------------------
capture.kernel_packets | Total |
decoder.pkts | Total |
decoder.bytes | Total |
decoder.ipv4 | Total |
decoder.ipv6 | Total |
decoder.ethernet | Total |
decoder.tcp | Total |
decoder.udp | Total |
decoder.icmpv6 | Total |
decoder.avg_pkt_size | Total |
decoder.max_pkt_size | Total |
flow.tcp | Total |
flow.udp | Total |
flow.icmpv6 | Total |
tcp.sessions | Total |
tcp.syn | Total |
tcp.synack | Total |
tcp.rst | Total |
app_layer.flow.http | Total |
app_layer.tx.http | Total |
app_layer.flow.tls | Total |
app_layer.flow.dns_udp | Total |
app_layer.tx.dns_udp | Total |
app_layer.flow.failed_udp | Total |
flow.spare | Total |
flow_mgr.flows_checked | Total |
flow_mgr.flows_notimeout | Total |
flow_mgr.rows_checked | Total |
flow_mgr.rows_skipped | Total |
flow_mgr.rows_maxlen | Total |
tcp.memuse | Total |
tcp.reassembly_memuse | Total |
dns.memuse | Total |
http.memuse | Total |
flow.memuse | Total |
------------------------------------------------------------------------------------
对于其他的，大家自己去看吧！
我这里主要讲的是eve.json和fast.log的区别
在2281行。
eve.json（即包括所有类型的数据）
2017年8月16日的上午8点54分07秒
fast.log（即只是报警数据）
Suricata产生的数据存储目录的更多相关文章
- MySQL更改数据库数据存储目录
MySQL数据库默认的数据库文件位于/var/lib/mysql下,有时候由于存储规划等原因,需要更改MySQL数据库的数据存储目录.下文总结整理了实践过程的操作步骤. 1:确认MySQL数据库存储目 ...
- mysql更改数据存储目录
具体操作请参考文章 1.http://blog.csdn.net/aaronbai/article/details/1431190 更改数据存储目录时候会出现 ERROR 2002 (HY000): ...
- Ubuntu上更改MySQL数据库数据存储目录
之前写过一篇博客"MySQL更改数据库数据存储目录",当时的测试环境是RHEL和CentOS,谁想最近在Ubuntu下面更改MySQL数据库数据存储目录时遇到了之前未遇到的问题,之 ...
- MySQL 更改数据库数据存储目录
MySQL数据库默认的数据库文件位于 /var/lib/mysql 下,有时候由于存储规划等原因,需要更改 MySQL 数据库的数据存储目录. 下文总结整理了实践过程的操作步骤. 1 确认MySQ ...
- Ubuntu 安装mysql & 自定义数据存储目录
一.安装 apt-get install mysql-server 执行过程如下: root@duke:~# apt-get install mysql-server 正在读取软件包列表... 完成 ...
- Windows安装RabbitMQ并设置数据存储目录
一.安装Elang 下载otp_win64_xx.x.exe,当前使用otp_win64_21.3.exe版本,按步骤完成安装. 下载地址:http://www.erlang.org/download ...
- centos mysql 数据存储目录安装位置
rpm -ql mysql查看安装位置 MYSQL默认的数据文件存储目录为/var/lib/mysql.假如要把目录移到/home/data下需要进行下面几步: 1.home目录下建立data目录 c ...
- mysql5.6更改datadir数据存储目录
环境需求: 有些数据存储场景可能需要将数据放到指定的挂载路径或目录,mysql默认存放数据路径在:/var/lib/mysql下. 测试环境: 操作步骤: 1. 查看当前存储目录 [root@mysq ...
- linux 更改mysql 数据存储目录
https://www.cnblogs.com/hellangels333/p/8376177.html 参考位博主的文章,稍做改动 1.检查mysql数据库存放目录 mysql -u root - ...
随机推荐
- UsbManager, UsbDevice的简单示例
activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout ...
- ALVtree 显示BOM结构
REPORT z_barry_alv_tree1_bom MESSAGE-ID oo. TABLES: stpox.INCLUDE <icon>. CLASS: cl_gui_col ...
- rails find find_by where
find根据id进行查询,像Product.find(3),查询语句是Product Load (0.1ms) SELECT "products".* FROM "pro ...
- IE67 下 setattribute class 失效
解决办法.将class 换成 className ,同理.ff不能识别className,将其换成class element.setAttribute("class"," ...
- mysql优化----大数据下的分页，延迟关联，索引与排序的关系，重复索引与冗余索引，索引碎片与维护
理想的索引,高效的索引建立考虑: :查询频繁度(哪几个字段经常查询就加上索引) :区分度要高 :索引长度要小 : 索引尽量能覆盖常用查询字段(如果把所有的列都加上索引,那么索引就会变得很大) : 索引 ...
- mysql字符串的常用函数（截取和拼接）
#截取字符串(先正序取2个,再倒序取1个)SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('aaa-gg-cc-dd','-',2),'-',-1) #获取子表某个字段的 ...
- KMP 、扩展KMP、Manacher算法 总结
一. KMP 1 找字符串x是否存在于y串中,或者存在了几次 HDU1711 Number Sequence HDU1686 Oulipo HDU2087 剪花布条 2.求多个字符串的最长公共子串 P ...
- SPOJ:Elegant Permuted Sum(贪心)
Special Thanks: Jane Alam Jan*At moment in University of Texas at San Antonio - USA You will be give ...
- CodeForces242D：Connected Components （不错的并查集）
We already know of the large corporation where Polycarpus works as a system administrator. The compu ...
- [Selenium] Android 中旋转屏幕，触摸，滚动
package com.learingselenium.android; import junit.framework.TestCase import org.openqa.selenium.Rota ...