模块有个简单的文档
http://www.grid.net.ru/nginx/mogilefs.en.html
安装
#wget http://www.grid.net.ru/nginx/download/nginx_mogilefs_module-1.0.4.tar.gz
#tar zxvf nginx_mogilefs_module-1.0.4.tar.gz
#cd nginx-1.0.14
#./configure –prefix=/data/app/nginx –add-module=../nginx_mogilefs_module-1.0.4/ –with-debug
#make & make install
#vim /data/app/nginx/conf/nginx.conf

location /download/ {
                mogilefs_tracker 27.17.28.133:7777;
                mogilefs_domain test1;
                mogilefs_pass {
                        proxy_pass $mogilefs_path;
                        proxy_hide_header Content-Type;
                        proxy_buffering off;
                }
        }

访问 http://nginx/download/mogilefs_key 就可以访问mogiles stored里的文件了，所以，最好是以文件名作为key存入mogilefs。
nginx中的访问控制，流量控制等对这个url同样有效。
关于upload
按照文档nginx.conf如下

location /upload/{
                allow all;
                autoindex       on;
                client_max_body_size    200m;
                client_body_temp_path   /tmp;
                mogilefs_tracker 27.17.28.133:7777;
                mogilefs_domain test1;
                mogilefs_methods PUT DELETE;
                mogilefs_pass {
                        proxy_pass $mogilefs_path;
                        proxy_hide_header Content-Type;
                        proxy_buffering off;
                }
        }

用curl模拟了delete的操作，好像没什么问题，tracker的mysql记录和两台stored的文件都删除了
curl –request DELETE http://27.17.28.134/upload/2222
但是put操作确发生了问题
curl –request PUT –data “/home/ftpuser/memcached-1.4.13.tar.gz” http://27.17.28.134/upload/memcached-1.4.13.tar.gz
tracker的mysql已经写入到tempfile的数据表中了，而且其中一台stored已经写入了文件，但是好像在写入第二台stored的时候出现了问题，一直到curl报错退出
curl: (52) Empty reply from server
追踪了一下nginx的debug日志：
012/05/04 16:11:43 [debug] 31056#0: *10 http upstream request: “/mogstored_spare_352054896/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http upstream process header
2012/05/04 16:11:43 [debug] 31056#0: *10 malloc: 0000000014FA4250:4096
2012/05/04 16:11:43 [debug] 31056#0: *10 recv: fd:7 118 of 4096
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy status 200 “200 OK”
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy header: “Content-Type: text/html”
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy header: “Content-Length: 18″
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy header: “Server: Perlbal”
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy header: “Connection: close”
2012/05/04 16:11:43 [debug] 31056#0: *10 http proxy header done
2012/05/04 16:11:43 [debug] 31056#0: *10 finalize http upstream request: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 finalize http proxy request
2012/05/04 16:11:43 [debug] 31056#0: *10 free rr peer 1 0
2012/05/04 16:11:43 [debug] 31056#0: *10 close http upstream connection: 7
2012/05/04 16:11:43 [debug] 31056#0: *10 event timer del: 7: 1336119163692
2012/05/04 16:11:43 [debug] 31056#0: *10 reusable connection: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 http output filter “/mogstored_spare_352054896/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http copy filter: “/mogstored_spare_352054896/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http postpone filter “/mogstored_spare_352054896/2222?” 00007FFF4C412DC0
2012/05/04 16:11:43 [debug] 31056#0: *10 write old buf t:0 f:0 0000000000000000, pos 0000000000000000, size: 0 file: 0, size: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 write new buf t:0 f:0 0000000000000000, pos 0000000000000000, size: 0 file: 0, size: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 http write filter: l:0 f:0 s:0
2012/05/04 16:11:43 [debug] 31056#0: *10 http copy filter: 0 “/mogstored_spare_352054896/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http finalize request: 0, “/mogstored_spare_352054896/2222?” a:1, c:1
2012/05/04 16:11:43 [debug] 31056#0: *10 mogilefs finish phase handler: state=2, status=0
2012/05/04 16:11:43 [debug] 31056#0: *10 http wake parent request: “/upload/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http posted request: “/upload/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 content phase: 9
2012/05/04 16:11:43 [debug] 31056#0: *10 mogilefs put handler
2012/05/04 16:11:43 [debug] 31056#0: *10 mogilefs put handler state: 2, status: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 http subrequest “/mogstored_spare_352059552/2222?”
2012/05/04 16:11:43 [debug] 31056#0: *10 http finalize request: -4, “/upload/2222?” a:0, c:1
2012/05/04 16:11:43 [debug] 31056#0: *10 set http keepalive handler
2012/05/04 16:11:43 [debug] 31056#0: *10 http close request
2012/05/04 16:11:43 [debug] 31056#0: *10 http log handler
2012/05/04 16:11:43 [debug] 31056#0: *10 posix_memalign: 0000000014FA5260:4096 @16
2012/05/04 16:11:43 [debug] 31056#0: *10 run cleanup: 0000000014FB45C0
2012/05/04 16:11:43 [debug] 31056#0: *10 file cleanup: fd:4
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA4250
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA1220
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014F7D370
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FB3980, unused: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA0210, unused: 0
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA2230, unused: 2
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA3240, unused: 56
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014FA5260, unused: 3867
2012/05/04 16:11:43 [debug] 31056#0: *10 event timer add: 3: 65000:1336119168693
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014F83B80
2012/05/04 16:11:43 [debug] 31056#0: *10 free: 0000000014F84180
2012/05/04 16:11:43 [debug] 31056#0: *10 hc free: 0000000000000000 0
2012/05/04 16:11:43 [debug] 31056#0: *10 hc busy: 0000000000000000 0
2012/05/04 16:11:43 [debug] 31056#0: *10 reusable connection: 1
2012/05/04 16:11:43 [debug] 31056#0: *10 post event 0000000014F862D0
2012/05/04 16:11:43 [debug] 31056#0: timer delta: 1
2012/05/04 16:11:43 [debug] 31056#0: posted events 0000000014F862D0
2012/05/04 16:11:43 [debug] 31056#0: posted event 0000000014F862D0
2012/05/04 16:11:43 [debug] 31056#0: *10 delete posted event 0000000014F862D0
2012/05/04 16:11:43 [debug] 31056#0: *10 http keepalive handler
2012/05/04 16:11:43 [debug] 31056#0: *10 malloc: 0000000014F83B80:1024
2012/05/04 16:11:43 [debug] 31056#0: *10 recv: fd:3 -1 of 1024
2012/05/04 16:11:43 [debug] 31056#0: *10 recv() not ready (11: Resource temporarily unavailable)
2012/05/04 16:11:43 [debug] 31056#0: posted event 0000000000000000
2012/05/04 16:11:43 [debug] 31056#0: worker cycle
2012/05/04 16:11:43 [debug] 31056#0: epoll timer: 65000
2012/05/04 16:12:48 [debug] 31056#0: timer delta: 65001
2012/05/04 16:12:48 [debug] 31056#0: *10 event timer del: 3: 1336119168693
2012/05/04 16:12:48 [debug] 31056#0: *10 http keepalive handler
2012/05/04 16:12:48 [debug] 31056#0: *10 close http connection: 3
2012/05/04 16:12:48 [debug] 31056#0: *10 reusable connection: 0
2012/05/04 16:12:48 [debug] 31056#0: *10 free: 0000000014F83B80
2012/05/04 16:12:48 [debug] 31056#0: *10 free: 0000000000000000
2012/05/04 16:12:48 [debug] 31056#0: *10 free: 0000000014F7B4F0, unused: 8
2012/05/04 16:12:48 [debug] 31056#0: *10 free: 0000000014F84070, unused: 128
2012/05/04 16:12:48 [debug] 31056#0: posted events 0000000000000000
2012/05/04 16:12:48 [debug] 31056#0: worker cycle
2012/05/04 16:12:48 [debug] 31056#0: epoll timer: -1
补：
这个问题已经解决，需要一个小小的patch，打完patch之后重新编译nginx即可。
详情见这个 http://www.ruby-forum.com/topic/217606

diff --git a/ngx_http_mogilefs_module.c b/ngx_http_mogilefs_module.c
index e229f47..a4d249d 100644--- a/ngx_http_mogilefs_module.c
+++ b/ngx_http_mogilefs_module.c
@@ -483,6 +483,9 @@ ngx_http_mogilefs_put_handler(ngx_http_request_t *r)
         case FETCH:
             spare_location = mgcf->create_close_spare_location;
             ctx->state = CREATE_CLOSE;+#if defined nginx_version && nginx_version >= 8011+            r->main->count++;+#endif
             break;
         case CREATE_CLOSE:
             r->headers_out.content_length_n = 0;

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