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the meaning of the ngx_http_upstream_t data structure typedef struct NGX_HTTP_UPSTREAM_S ngx_http_upstream_t; struct NGX_HTTP_UPSTREAM_S {//handler callback function for read events ngx_http_upstream_handler_pt Read_event_handler; A callback function that handles write events ngx_http_upstream_handler_pt Write_event_handler; Initiate a connection to upstream server ngx_peer_connection_t peer; /* When a response is forwarded to a do
We often encounter a variety of nginx error logs, usually based on some nginx error log can be analyzed for reasons. However, it is not very systematic, here on the Internet to see a data or comparison of the system on the nginx of the Error.log detailed instructions, here record, easy to see after understanding. Error message Error description "
. Error 606 the port is not connectedProblem: the dial-up network cannot connect to the required device PortCause: raspppoe is not completely and correctly installed, connection line failure, ADSL ModemFaultSolution: Uninstall any pppoe software, reinstall it, and check the network cable and ADSL.Modem Error 608 the device does not existProblem: the device connected to the dial-up network does not exist.Cause: raspppoe is not fully and correctly installed.Solution: uninstall and reinstall any pp
: RasPPPoE is not fully and correctly installed. Solution: uninstall and reinstall any PPPoE software. Error 609 The device type does not exist Problem: the type of the device connected to the dial-up network cannot be determined. Cause: RasPPPoE is not fully and correctly installed. Solution: uninstall and reinstall any PPPoE software. Error 611 The route is not available/612 The route is not allocated Problem: the dial-up network connection route is incorrect. Cause: the RasPPPoE is not
cable and adsl modem Error. Adsl pppoe dialing failure code: Error 608 The device does not existProblem: the device connected to the dial-up network does not exist.Cause: PPPoE is not fully and correctly installed.Solution: uninstall and reinstall any PPPoE software. Adsl pppoe dialing failure code: Error 609 The device type does not existProblem: the type of the device connected to the dial-up network cannot be determined.Cause: PPPoE is not fully and correctly installed.Solution: uninstall an
determined.Cause: RasPPPoE is not fully and correctly installed.Solution: uninstall and reinstall any PPPoE software. Error 611 The route is not available/612 The route is notAllocatedProblem: the dial-up network connection route is incorrect.Cause: the RasPPPoE is not fully and correctly installed, and the ISP Server is faulty.Solution: uninstall and reinstall any PPPoE software, and call the ISP to ask E
cannot be determined. Cause: RasPPPoE is not fully and correctly installed. Solution: uninstall and reinstall any PPPoE software. Error 611 The route is not available/612 The route is not Allocated Problem: the dial-up network connection route is incorrect. Cause: the RasPPPoE is not fully and correctly installed, and the ISP Server is faulty. Solution: uninstall and reinstall any PPPoE software, and call the IS
does not existProblem: the type of the device connected to the dial-up network cannot be determined.Cause: raspppoe is not fully and correctly installed.Solution: uninstall and reinstall any pppoe software.6. Error 611 the route is not available/612 the route is not allocatedProblem: the dial-up network connection route is incorrect.Cause: the raspppoe is not fully and correctly installed, and the ISP Server is faulty.Solution: uninstall and reinstal
connected to the dial-up network cannot be determined.Cause: raspppoe is not fully and correctly installed.Solution: uninstall and reinstall any pppoe software. Error 611 the route is not available/612 the route is not allocated Problem: the dial-up network connection route is incorrect.Cause: the raspppoe is not fully and correctly installed, and the ISP Server is faulty.Solution: uninstall and reinstall any pppoe software, and call the
fully and correctly installed Solution: Uninstall any PPPoE software, reinstall Error 606 The port is not connected Problem: dial-up Networking network cannot connect required device ports Reason: Raspppoe not complete and correct installation, cable fault, ADSL MODEM Fault Solution: Uninstall any PPPoE software, reinstall, check cable and ADSL MODEM Error 608 The device does not exist Problem: Dial-Up Networking network connection device does not exist Reason: Raspppoe not fully and
-connected devices whose types are not determined Reason: Raspppoe not fully and correctly installed Solution: Uninstall any PPPoE software, reinstall Error 611 The route is isn't available/612 the route is not allocated Problem: dial-up Networking network connection routing is incorrect Reason: Raspppoe not fully and correctly installed, ISP server failure Solution: Uninstall any PPPoE software, reinstall, call the
installed Solution: Uninstall any PPPoE software, reinstall Error 611 The route is isn't available/612 the route is not Allocated Problem: dial-up Networking network connection routing is incorrect Reason: Raspppoe not fully and correctly installed, ISP server failure Solution: Uninstall any PPPoE software, reinstall, call the ISP to inquire Error 617 The port or device is already disconnecting Problem:
, fair A more intelligent load balancing algorithm than weight and Ip_hash, the fair algorithm can intelligently load balance based on the size of the page and the length of time it takes to load, that is, to allocate requests based on the response time of the backend server, with short response times. Nginx itself does not support fair, and if this scheduling algorithm is required, the Upstream_fair module must be installed. 5, Url_hash The efficiency of the back-end cache server can be further
and correctly installed Solution: Uninstall any PPPoE software, reinstall Error 611 The route is isn't available/612 the route is not allocated Problem: dial-up Networking network connection routing is incorrect Reason: Raspppoe not fully and correctly installed, ISP server failure Solution: Uninstall any PPPoE software, reinstall, call the ISP to inquire Error 617 The port or device is already disco
fully and correctly installed Solution: Uninstall any PPPoE software, reinstall Error 606 The port is not connected Problem: dial-up Networking network cannot connect required device ports Reason: Raspppoe not complete and correct installation, cable fault, ADSL MODEM Fault Solution: Uninstall any PPPoE software, reinstall, check cable and ADSL MODEM Error 608 The device does not exist Problem: Dial-Up Networking network connection device does not exist Reason: Raspppoe not fully and
installedSolution: Uninstall any PPPoE software, reinstallError 609 The device type does not existProblem: Dial-up network-connected devices whose types are not determinedReason: Raspppoe not fully and correctly installedSolution: Uninstall any PPPoE software, reinstallError 611 The route is isn't available/612 the route is not allocatedProblem: dial-up Networking network connection routing is incorrectReason: Raspppoe not fully and correctly installed, ISP
correctly installed Solution: Uninstall any PPPoE software, reinstall Error 611 The route is isn't available/612 the route is not allocated Problem: dial-up Networking network connection routing is incorrect Reason: Raspppoe not fully and correctly installed, ISP server failure Solution: Uninstall any PPPoE software, reinstall, call the ISP to inquire Error 617 The port or device is already disconnec
simple: http { upstream my_upstream { server server1.example.com; server server2.example.com; } server { listen 80; location / { proxy_set_header Host $host; proxy_pass http://my_upstream; } }} You can use the proxy_set_header command to set the Host, and proxy_pass forwards the request to the upstream my_upstream.Http Keepalives) HTTP us
Another protocol for implementing vpn is ipsec. To be precise, ipsec is a framework composed of multiple protocols. Its implementation can be divided into the following four steps: 1. implement data stream filtering control (control by acl) 2. Security proposal (implementing the working mode, selecting the security protocol, verifying the algorithm, and selecting the consistency of the encryption algorithm if the esp protocol is used) 3. Create a security policy (acl + security proposal + ike ne
scanning to F, the elements in the stack are sequentially () A. + (*- B. + (-* C. /+ (*-* D. /+-* Answer The first question In general, the recursive algorithm in the actual implementation of the computer contains a lot of repetitive calculation, so the efficiency is lower the second question The breadth-first search for graphs is similar to the sequence traversal of a tree, which requires the help of the third problem of the queue The application of the stack in the transformation of the pig e
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