**游戏网站平台在线运营管理香港服务器-视频资源在线播放平台
香港外贸自营企业网站平台服务器-视讯直播大带宽低延迟服务器QQ:30074259372017413756
Tel Vx:18608932485
官网:http://www.huoshaocloud.com
海外多地区机房资源详情欢迎详聊
香港服务器租用美国服务器租用服务器托管服务器
TTL是什么意思?
TTL是域名解析的生命周期,TTL值全称是“生存时间(Time To Live)”,简单的说它表示DNS记录在DNS服务器上的缓存时间。
对于用户来说,每一次访问网站A,不会每次都到DNS服务器域名解析,而是用户第一次访问时才到DNS服务器进行解析,然后解析的结果会缓存到当地的递归DNS服务器上,当地的第二个用户访问网站A时,递归服务器会直接返回解析结果,而不会再向DNS服务器请求解析,那么多久之后递归服务器才会更新这个解析结果呢?这就是TTL来决定的。
下面举个例子还帮助你了解TTL是什么意思。
假如:
有这样一个域名www.huoshaocloud.com,对应IP地址为1.1.1.1,把它的TTL设为3600秒,这条记录存储在一台DNS服务器上。
现在有一个用户在访问www.huoshaocloud.com时,网络服务商的DNS就会试图为用户解析www.huoshaocloud.com,当然网络服务商这台DNS服务器并没有包含www.huoshaocloud.com这条信息,因此无法立即解析,但是通过全球DNS的递归查询后,最终定位到www.huoshaocloud.com这台DNS服务器对应的IP地址为1.1.1.1并将结果告诉告诉网络服务商的DNS服务器,然后再由 网络服务商告诉用户结果。
idc服务商为了以后加快对www.huoshaocloud.com这条记录的解析,就将刚才的1.1.1.1结果保留一段时间,这段时间就是TTL值,在这段时间内如果用户又有对www.huoshaocloud.com这条记录的解析请求,它就直接告诉用户IP地址为1.1.1.1,当TTL到期则又会重复上面的过程。
TTL通常设置为多少合适?
如此看来,那我把TTL设置为非常小,比如1秒,岂不是最好,这样我修改了解析那么对于用户来说立即就可以生效。答案是否定的,如果TTL设置为1秒,那么就意味着几乎每次用户的解析,递归服务器都需要向DNS服务器进行解析请求,这样所耗费的时间就会增加很多,而且权威服务器的解析因为要判断用户的来源进行智能解析,比起来直接使用缓存回答耗费的时间会更长,而且失败率也会更高,因此这对用户的访问体验和解析稳定性都有损害。
ttl值越大越好吗?TTL通常设置为多少合适呢?ttl值大好还是小好,这个没有统一的标准答案。下面天下数据给出一些常见网站类型的推荐值,您可以按照以下建议进行TTL设置。
116.206.100.1
116.206.100.2
116.206.100.3
116.206.100.4
116.206.100.5
116.206.100.6
116.206.100.7
116.206.100.8
116.206.100.9
116.206.100.10
116.206.100.11
116.206.100.12
116.206.100.13
116.206.100.14
116.206.100.15
116.206.100.16
116.206.100.17
116.206.100.18
116.206.100.19
116.206.100.20
116.206.100.21
116.206.100.22
116.206.100.23
116.206.100.24
116.206.100.25
116.206.100.26
116.206.100.27
116.206.100.28
116.206.100.29
116.206.100.30
116.206.100.31
116.206.100.32
116.206.100.33
116.206.100.34
116.206.100.35
116.206.100.36
116.206.100.37
116.206.100.38
116.206.100.39
116.206.100.40
116.206.100.41
116.206.100.42
116.206.100.43
116.206.100.44
116.206.100.45
116.206.100.46
116.206.100.47
116.206.100.48
116.206.100.49
116.206.100.50
116.206.100.51
116.206.100.52
116.206.100.53
116.206.100.54
116.206.100.55
116.206.100.56
116.206.100.57
116.206.100.58
116.206.100.59
116.206.100.60
116.206.100.61
116.206.100.62
116.206.100.63
116.206.100.64
116.206.100.65
116.206.100.66
116.206.100.67
116.206.100.68
116.206.100.69
116.206.100.70
116.206.100.71
116.206.100.72
116.206.100.73
116.206.100.74
116.206.100.75
116.206.100.76
116.206.100.77
116.206.100.78
116.206.100.79
116.206.100.80
116.206.100.81
116.206.100.82
116.206.100.83
116.206.100.84
116.206.100.85
116.206.100.86
116.206.100.87
116.206.100.88
116.206.100.89
116.206.100.90
116.206.100.91
116.206.100.92
116.206.100.93
116.206.100.94
116.206.100.95
116.206.100.96
116.206.100.97
116.206.100.98
116.206.100.99
116.206.100.100
116.206.100.101
116.206.100.102
116.206.100.103
116.206.100.104
116.206.100.105
116.206.100.106
116.206.100.107
116.206.100.108
116.206.100.109
116.206.100.110
116.206.100.111
116.206.100.112
116.206.100.113
116.206.100.114
116.206.100.115
116.206.100.116
116.206.100.117
116.206.100.118
116.206.100.119
116.206.100.120
116.206.100.121
116.206.100.122
116.206.100.123
116.206.100.124
116.206.100.125
116.206.100.126
116.206.100.127
116.206.100.128
116.206.100.129
116.206.100.130
116.206.100.131
116.206.100.132
116.206.100.133
116.206.100.134
116.206.100.135
116.206.100.136
116.206.100.137
116.206.100.138
116.206.100.139
116.206.100.140
116.206.100.141
116.206.100.142
116.206.100.143
116.206.100.144
116.206.100.145
116.206.100.146
116.206.100.147
116.206.100.148
116.206.100.149
116.206.100.150
116.206.100.151
116.206.100.152
116.206.100.153
116.206.100.154
116.206.100.155
116.206.100.156
116.206.100.157
116.206.100.158
116.206.100.159
116.206.100.160
116.206.100.161
116.206.100.162
116.206.100.163
116.206.100.164
116.206.100.165
116.206.100.166
116.206.100.167
116.206.100.168
116.206.100.169
116.206.100.170
116.206.100.171
116.206.100.172
116.206.100.173
116.206.100.174
116.206.100.175
116.206.100.176
116.206.100.177
116.206.100.178
116.206.100.179
116.206.100.180
116.206.100.181
116.206.100.182
116.206.100.183
116.206.100.184
116.206.100.185
116.206.100.186
116.206.100.187
116.206.100.188
116.206.100.189
116.206.100.190
116.206.100.191
116.206.100.192
116.206.100.193
116.206.100.194
116.206.100.195
116.206.100.196
116.206.100.197
116.206.100.198
116.206.100.199
116.206.100.200
116.206.100.201
116.206.100.202
116.206.100.203
116.206.100.204
116.206.100.205
116.206.100.206
116.206.100.207
116.206.100.208
116.206.100.209
116.206.100.210
116.206.100.211
116.206.100.212
116.206.100.213
116.206.100.214
116.206.100.215
116.206.100.216
116.206.100.217
116.206.100.218
116.206.100.219
116.206.100.220
116.206.100.221
116.206.100.222
116.206.100.223
116.206.100.224
116.206.100.225
116.206.100.226
116.206.100.227
116.206.100.228
116.206.100.229
116.206.100.230
116.206.100.231
116.206.100.232
116.206.100.233
116.206.100.234
116.206.100.235
116.206.100.236
116.206.100.237
116.206.100.238
116.206.100.239
116.206.100.240
116.206.100.241
116.206.100.242
116.206.100.243
116.206.100.244
116.206.100.245
116.206.100.246
116.206.100.247
116.206.100.248
116.206.100.249
116.206.100.250
116.206.100.251
116.206.100.252
116.206.100.253
116.206.100.254
116.206.100.255
江苏镇江,自营机房,极致性价比:
L5630*2/32G/240G SSD/20M独享/50G防御=399/月 特价299/月
L5630*2/32G/240G SSD/100M独享/50G防御=999/月
E5-2620*2/32G/240G SSD/20M独享/50G防御=599/月
E5-2620*2/32G/240G SSD/100M独享/50G防御=1199/月
默认电信线路,+100/月升级为双线,+200/月升级为三线或BGP线路
免费提供7×24小时技术售后保障,现机极速交付
【多IP服务器-258ip/4C/8C/16C】
【CN2服务器-CN2直连,超低延迟】
【高防服务器-单机防御,专线清洗】
更多地区和配置请咨询QQ:83567425
页:
[1]