4u rackmount

The distribution of Message Centers is achieved through establishing a persistent connection between websocket and the backend server. The advantage of this method is to save network bandwidth, second, users can receive messages sent from the backend in real time. netty is used in the backend implementation. After stress testing, each server can withstand 0.5 million persistent connections, that is, 0.5 million users at the same time (only one persistent connection is established for each websit

primary-for F (0x2ea1740) E (0x2e76b60) 8 vptr= (( f::_ztv1f) + 28u)2) When a base class repeats the inheritance conditionsuch as non-virtual inheritance, repeated inheritance, the compiler will generate alarm information:Warning:direct base ' D ' inaccessible in ' G ' due to ambiguity [enabled by default]The compiler produces the same layout as Case 1, all in the order of inheritance3) virtual Inheritance (non-diamond inheritance)If the base class does not contain inheritance of the s

/sysva5723213Oldser 29016 UFO 0u CHR 136,11 0t0 14/DEV/PTS/11Oldser 29016 UFO 1u CHR 136,11 0t0 14/DEV/PTS/11Oldser 29016 UFO 2u CHR 136,11 0t0 14/DEV/PTS/11Oldser 29016 UFO 3u IPv4 550310 0t0 TCP localhost:5555 (LISTEN)Oldser 29016 UFO 4u IPv4 550311 0t0 TCP localhost:5555->localhost:39905 (close_wait)Sometimes there is a line called name Anon_inode, so what does this mean?After I have added a epoll to the service-side program, after starting the ser

marketing has been a long time. National Service virtual trading platform 5173 last year on the introduction of International Direct Web site test page, for some reason, testing a very short time suddenly closed. To this year, with 5173 of the same for IDG investment vest Network quietly conducted overseas direct Sales website test; and vest as the same as the SV, the east receiving site is in intensive work to register inventory work, the next step to what is already clear, and another receipt

/ ./Configure; make make install [Root @ localhost ~] # Cat/etc/rsyncd. conf Uid = nobody Gid = nobody Use chroot = no Max connections = 10 Strict modes = yes Pid file =/var/run/rsyncd. pid Lock file =/var/run/rsync. lock Log file =/var/log/rsyncd. log [Web1] Path =/web1/wwwroot/ Comment = web1 file Ignore errors Read only = no Write only = no Hosts allow = 192.168.71.133 Hosts deny = * List = false Uid = root Gid = root Auth users = web1user Secrets file =/etc/web1.pass [Root @ localhost ~]

registration, in this case, the index file is synchronized with the working tree.Commit: it is the final stage. only after commit, our code has actually entered the git repository. We use git-commit to submit the content in index file to commit. ① Git diff Git diff: view the difference between the working tree and index file.Git diff -- cached: check the difference between index file and commit.Git diff HEAD: view the differences between the working tree and commit.Git diff filename: displays t

] redis-2.8.9]# mkdir-p/usr/local/redis/bin[Email protected] redis-2.8.9]# mkdir/usr/local/redis/conf [Email protected] redis-2.8.9]#CD src/[Email protected] src]#CP redis-benchmark redis-check-aof redis-check-dump redis-sentinel redis-server redis-cli/usr/local/redis/bin/ #相关命令[Email protected] src]#CD: CP redis.conf/usr/local/redis/conf/ #拷贝主配置文件Modify the configuration file (main service):[Email protected] ~]# vi/usr/local/redis/conf/redis.confdaemonize Yes #no改为yes to start the daemon proce

fin past, and its state changes to Last_ack.A large number of close_wait examples and solutions are found on the server (examples from the internet, almost) $/usr/sbin/lsof-i|grep 6800$ /usr/sbin/lsof -i | grep 6800Oracle 22725 oracle9i 3u IPv4 18621468 TCP rhel3:6800 (LISTEN)Oracle 22725 oracle9i 4u IPv4 18621469 TCP rhel3:6800->rhel3:2174 (close_wait)Oracle 22725 oracle9i 8u IPv4 18621568 TCP rhel3:6800->rhel3:2175 (close_wait)Oracle 2

1. To view the Port Usage command: lsof-i[Root@www ~]# Lsof-iCOMMAND PID USER FD TYPE DEVICE SIZE NODE NAMENginx 2333 root 6u IPv4 6242 TCP *:http (LISTEN)Nginx 2334 www 6u IPv4 6242 TCP *:http (LISTEN)sshd 2349 root 3u IPv6 6283 TCP *:ndmp (LISTEN)sshd 2349 Root 4u IPv6 6286 TCP *:ssh (LISTEN)This returns the current usage of all open ports on Linux.The first paragraph is the process, and the last column is the protocol to listen on, the IP and port

/install.log:3347[email protected] lhd]# fuser-v/root/install.logLSOFLsof has more features# lsof-i See what Open ports are in the system, which processes, users are using them, and more verbose than the NETSTAT-LPTU output.# lsof-i 4 View IPv4 type of processCOMMAND PID USER FD TYPE DEVICE SIZE NODE NAMEEXIM4 2213 Debian-exim 4u IPv4 4844 TCP *:smtp (LISTEN)Dhclient3 2306 Root 4u IPv4 4555 UDP *:BOOTPC# ls

one party and waits for the other party after sending the fin message. After receiving the ACK message, you can enter the closed available status. There are a lot of close_wait examples and solutions on the server (the example is found on the internet, basically similar) Oracle9i @ rhel3 Oracle9i] $/usr/sbin/lsof-I | grep 6800Oracle 22725 Oracle9i 3u IPv4 18621468 TCP rhel3: 6800 (Listen)Oracle 22725 Oracle9i 4u IPv4 18621469 TCP rhel3: 6800->

] webserver]# kill-9 7045[Email protected] webserver]# kill-9 7054[Email protected] webserver]# kill-9 12730Review the discovery process without PHP again[Email protected] webserver]# lsof-n/|grep deletedmysqld 2660 MySQL 4u REG 8,2 0 524290/tmp/ibsf7sxt (deleted)Mysqld 2660 MySQL 5u REG 8,2 0 524305/tmp/ibccm4u4 (deleted)Mysqld 2660 MySQL 6u REG 8,2 0 524309/tmp/ibkuag2e (deleted)Mysqld 2660 MySQL 7u REG 8,2 0 524315/tmp/ibcle4bf (deleted)Mysqld 2660

/home/tester/tomcat_****_*****_8091/log S/catalina.out (Deleted)Java 18084 root 2w REG 8,2 2612191232 531376/home/tester/tomcat_****_*****_8091/log S/catalina.out (Deleted)Java 18084 root 50w REG 8,2 15403225088 664984/home/work/*****/log/***_****_****/cale NdarPriceTask.log (Deleted)Vim 20813 tester 0u CHR 136,8 0t0 11/dev/pts/8 (Deleted)Vim 20813 tester 1u CHR 136,8 0t0 11/dev/pts/8 (Deleted)Vim 20813 Tester 2u CHR 136,8 0t0 11/dev/pts/8 (Deleted)VIM 20813 Tester

At present, IBM is trying to expand its POWER8 server product line as part of its continued efforts to launch a competitive product to replace Intel's x86-based server system. Power8 chips and their server systems were first launched in April this year. One representative of the new system is the ibmpowers0000l server. Ldquo; powers0000l is a two-socket 4U-based server, which is different from the previous POWER8 series, rdquo; IBM P At present, IBM

// Use the Vertex Tree to simulate Joseph's Problem // N person number: 0, 1, 2,... N-1, Report Number: 1 to M, report m out column // Www.cnblogs.com/flyinghearts # Include Cstdio > Template Int N > Struct Round2k { Enum {Down = Round2k N / 2u > : Down * 2 ,Up = Down = N ? Down: 2 * Down };}; Template Struct Round2k 1 > { Enum {Down = 1 , Up = 1 };};Template Int M, typename t = Int > // Interval [0, m)

example, the client is passively closed.When the other party calls closesocket, your program isInt nret = Recv (S ,....);If (nret = socket_error){// Closesocket (s );Return false;}Many people forget the sentence closesocket, which is too common.My understanding,When the active closing party sends a fin to the passive closing side, the TCP of the passive closing side immediately responds to an ACK and submits an error to the application,Cause the above socket send or Recv to return socket_error.