2

如何在获取过期对象或最大连接期间为旧对象提供服务？

我已经将 vcl_recv 中的宽限期配置为 vcl_fetch。

我什至尝试使用圣人模式给我一个“旧”缓存对象。

有人可以在这件事上给我帮助吗？

sub vcl_recv {

# Purge through http
if (req.request == "PURGE") {
if (!client.ip ~ purge) {
error 405 "Not allowed.";
}
ban("req.url ~ " + req.url );
error 200 "Purged.";
}

# Unset all cookies available
if (req.http.cookie) {
unset req.http.cookie;
}

if (req.request != "GET" && req.request != "HEAD") {
/* We only deal with GET and HEAD by default */
return (pass);
}

# Adding Grace period in case backend lags
set req.grace = 3d;
return (lookup);
}
....
sub vcl_fetch {
set beresp.grace = 4d;
set beresp.saintmode = 50s;
set beresp.ttl = 30s;
return (deliver);
}
#### 缓存请求清漆日志 
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
11 SessionOpen  c XXX.XXX.XXX.XXX 60750 XXX.XXX.XXX.XXX:2002
11 ReqStart     c XXX.XXX.XXX.XXX 60750 479090107
11 RxRequest    c GET
11 RxURL        c /image/1156499/1601812475/45010cb14311wq1fd2da042ed599f3ad917005085c400/1181_615/crop
11 RxProtocol   c HTTP/1.0
11 RxHeader     c Host: URL
11 RxHeader     c X-Real-IP: XXX.XXX.XXX.XXX
11 RxHeader     c X-Forwarded-For: XXX.XXX.XXX.XXX
11 RxHeader     c Connection: close
11 RxHeader     c User-Agent: GraphicalHttpClient 1.0.6 (Macintosh; Mac OS X 10.6.8; en_NL)
11 VCL_call     c recv lookup
11 VCL_call     c hash
11 Hash         c /image/1156499/1601812475/45010cb14311wq1fd2da042ed599f3ad917005085c400/1181_615/crop
11 Hash         c URL
11 VCL_return   c hash
11 Hit          c 479090015
11 VCL_call     c hit deliver
11 VCL_call     c deliver deliver
11 TxProtocol   c HTTP/1.1
11 TxStatus     c 200
11 TxResponse   c OK
11 TxHeader     c Server: nginx/1.0.11
11 TxHeader     c Content-Type: image/jpeg
11 TxHeader     c Content-Transfer-Encoding: binary
11 TxHeader     c Cache-Control: must-revalidate
11 TxHeader     c Content-Length: 125395
11 TxHeader     c Accept-Ranges: bytes
11 TxHeader     c Date: Tue, 07 Feb 2012 14:23:00 GMT
11 TxHeader     c X-Varnish: 479090107 479090015
11 TxHeader     c Age: 5693
11 TxHeader     c Via: 1.1 varnish
11 TxHeader     c Connection: close
11 Length       c 125395
11 ReqEnd       c 479090107 1328624580.355833769 1328624580.357449532 0.000084162 0.000103474 0.001512289
11 SessionClose c Connection: close
11 StatSess     c XXX.XXX.XXX.XXX 60750 0 1 1 0 0 0 29
#### 缓存请求过期清漆日志 
12 BackendOpen  b live XXX.XXX.XXX.XXX 41945 XXX.XXX.XXX.XXX 80
12 TxRequest    b GET
12 TxURL        b /image/1156499/1601812475/45010cb14311wq1fd2da042ed599f3ad917005085c400/1181_615/crop
12 TxProtocol   b HTTP/1.1
12 TxHeader     b Host: URL
12 TxHeader     b X-Real-IP: XXX.XXX.XXX.XXX
12 TxHeader     b X-Forwarded-For: XXX.XXX.XXX.XXX
12 TxHeader     b User-Agent: GraphicalHttpClient 1.0.6 (Macintosh; Mac OS X 10.6.8; en_NL)
12 TxHeader     b X-Varnish: 479090118
12 TxHeader     b Accept-Encoding: gzip
12 RxProtocol   b HTTP/1.1
12 RxStatus     b 200
12 RxResponse   b OK
12 RxHeader     b Server: nginx/1.0.11
12 RxHeader     b Date: Tue, 07 Feb 2012 14:26:00 GMT
12 RxHeader     b Content-Type: image/jpeg
12 RxHeader     b Connection: keep-alive
12 RxHeader     b Content-Transfer-Encoding: binary
12 RxHeader     b Cache-Control: must-revalidate
12 RxHeader     b Content-Length: 125395
12 Fetch_Body   b 4(length) cls 0 mklen 1
12 Length       b 125395
12 BackendReuse b live
11 SessionOpen  c XXX.XXX.XXX.XXX 50429 XXX.XXX.XXX.XXX:2002
11 ReqStart     c XXX.XXX.XXX.XXX 50429 479090118
11 RxRequest    c GET
11 RxURL        c /image/1156499/1601812475/45010cb14311wq1fd2da042ed599f3ad917005085c400/1181_615/crop
11 RxProtocol   c HTTP/1.0
11 RxHeader     c Host: URL
11 RxHeader     c X-Real-IP: XXX.XXX.XXX.XXX
11 RxHeader     c X-Forwarded-For: XXX.XXX.XXX.XXX
11 RxHeader     c Connection: close
11 RxHeader     c User-Agent: GraphicalHttpClient 1.0.6 (Macintosh; Mac OS X 10.6.8; en_NL)
11 VCL_call     c recv lookup
11 VCL_call     c hash
11 Hash         c /image/1156499/1601812475/45010cb14311wq1fd2da042ed599f3ad917005085c400/1181_615/crop
11 Hash         c URL
11 VCL_return   c hash
11 VCL_call     c miss fetch
11 Backend      c 12 live live
11 TTL          c 479090118 RFC 120 -1 -1 1328624761 0 1328624760 0 0
11 VCL_call     c fetch
11 TTL          c 479090118 VCL 33 -1 -1 1328624758 -3
11 TTL          c 479090118 VCL 33 40 -1 1328624758 -3
11 VCL_return   c deliver
11 ObjProtocol  c HTTP/1.1
11 ObjResponse  c OK
11 ObjHeader    c Server: nginx/1.0.11
11 ObjHeader    c Date: Tue, 07 Feb 2012 14:26:00 GMT
11 ObjHeader    c Content-Type: image/jpeg
11 ObjHeader    c Content-Transfer-Encoding: binary
11 ObjHeader    c Cache-Control: must-revalidate
11 VCL_call     c deliver deliver
11 TxProtocol   c HTTP/1.1
11 TxStatus     c 200
11 TxResponse   c OK
11 TxHeader     c Server: nginx/1.0.11
11 TxHeader     c Content-Type: image/jpeg
11 TxHeader     c Content-Transfer-Encoding: binary
11 TxHeader     c Cache-Control: must-revalidate
11 TxHeader     c Content-Length: 125395
11 TxHeader     c Accept-Ranges: bytes
11 TxHeader     c Date: Tue, 07 Feb 2012 14:26:00 GMT
11 TxHeader     c X-Varnish: 479090118
11 TxHeader     c Age: 0
11 TxHeader     c Via: 1.1 varnish
11 TxHeader     c Connection: close
11 Length       c 125395
11 ReqEnd       c 479090118 1328624757.532856941 1328624760.899299860 0.000095606 3.364968061 0.001474857
11 SessionClose c Connection: close
11 StatSess     c XXX.XXX.XXX.XXX 50429 3 1 1 0 0 1 284 125395
0 Debug        - "lurker: 0x7f244cfd1e00 30 0"
4

1 回答 1

3

这是个有趣的问题。

来自文档

当多个客户端请求同一个页面时，Varnish 将向后端发送一个请求，并在从后端获取一份副本时暂停其他请求。

因此，即使您启用了宽限期，任何时候都会有一个客户端被阻止。Grace 通知 Varnish，您可以为所有其他 n-1 个客户端提供过时的内容，直到第一个人回来刷新一些内容。没有办法解除对那个人的阻止[技术上异步获取是不可能的]

看看这篇不错的文章，我认为您真正要求的是下一个版本的计划功能，我希望

于 2012-07-26T14:05:54.847 回答