简单的联想到是不是PAM模块未加载这个配置文件，一番对比，发现 /etc/pam.d/ 下面的 login su sshd 并没有太大的区别 都有一句加载locale变量
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# Read environment variables from /etc/environment and # /etc/security/pam_env.conf. session required pam_env.so # [1] # In Debian 4.0 (etch), locale-related environment variables were moved to # /etc/default/locale, so read that as well. session required pam_env.so user_readenv=1 envfile=/etc/default/locale
# Allow client to pass locale environment variables AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
# Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. #UsePAM no UsePAM yes
#!/bin/bash # # elasticsearch-backup-index.sh # # Push logstash index from yesterday to s3 with an accompanying restore script. # http://logstash.net # http://www.elasticsearch.org # https://github.com/s3tools/s3cmd | http://s3tools.org/s3cmd # # Inspiration: # http://tech.superhappykittymeow.com/?p=296 # # Must run on an elasticsearch node, and expects to find the index on this node.
usage() { cat << EOF
elasticsearch-backup-index.sh
Create a restorable backup of an elasticsearch index (assumes Logstash format indexes), and upload it to an existing S3 bucket. The default backs up an index from yesterday. Note that this script itself does not restart elasticsearch - the restore script that is generated for each backup will restart elasticsearch after restoring an archived index.
OPTIONS: -h Show this message -b S3 path for backups (Required) -g Consistent index name (default: logstash) -i Elasticsearch index directory (Required) -d Backup a specific date (format: YYYY.mm.dd) -c Command for s3cmd (default: s3cmd put) -t Temporary directory for archiving (default: /tmp) -p Persist local backups, by default backups are not kept locally -s Shards (default: 5) -r Replicas (default: 0) -e Elasticsearch URL (default: http://localhost:9200) -n How nice tar must be (default: 19) -u Restart command for elastic search (default 'service elasticsearch restart')
Connect to elasticsearch using 127.0.0.1 instead of localhost, backup the index "my_index" from 2013.05.21 instead of yesterday, use the s3cmd in /usr/local/bin explicitly, store the archive and restore script in /mnt/es/backups (and persist them) and use 'service es restart' to restart elastic search.
EOF }
if [ "$USER" != 'root' ] && [ "$LOGNAME" != 'root' ]; then # I don't want to troubleshoot the permissions of others echo "This script must be run as root." exit 1 fi
while getopts ":b:i:d:c:g:t:p:s:r:e:n:u:h" flag do case "$flag" in h) usage exit 0 ;; b) S3_BASE=$OPTARG ;; i) INDEX_DIR=$OPTARG ;; d) DATE=$OPTARG ;; c) S3CMD=$OPTARG ;; g) INAME=$OPTARG ;; t) TMP_DIR=$OPTARG ;; p) PERSIST=1 ;; s) if [[ $OPTARG =~ $RE_D ]]; then SHARDS=$OPTARG else ERROR="${ERROR}Shards must be an integer.\n" fi ;; r) if [[ $OPTARG =~ $RE_D ]]; then REPLICAS=$OPTARG else ERROR="${ERROR}Replicas must be an integer.\n" fi ;; e) ELASTICSEARCH=$OPTARG ;; n) if [[ $OPTARG =~ $RE_D ]]; then NICE=$OPTARG fi # If nice is not an integer, just use default ;; u) RESTART=$OPTARG ;; ?) usage exit 1 ;; esac done
# We need an S3 base path if [ -z "$S3_BASE" ]; then ERROR="${ERROR}Please provide an s3 bucket and path with -b.\n" fi
# We need an elasticsearch index directory if [ -z "INDEX_DIR" ]; then ERROR="${ERROR}Please provide an Elasticsearch index directory with -i.\n" fi
# If we have errors, show the errors with usage data and exit. if [ -n "$ERROR" ]; then echo -e $ERROR usage exit 1 fi
if [ -z "$INAME" ]; then INAME="logstash" fi
# Default logstash index naming is hardcoded, as are YYYY-mm container directories. if [ -n "$DATE" ]; then INDEX="$INAME-$DATE" YEARMONTH=${DATE//\./-} YEARMONTH=${YEARMONTH:0:7} else INDEX=`date --date='yesterday' +"$INAME-%Y.%m.%d"` YEARMONTH=`date --date='yesterday' +"%Y-%m"` fi S3_TARGET="$S3_BASE/$YEARMONTH"
# Make sure there is an index if ! [ -d $INDEX_DIR/$INDEX ]; then echo "The index $INDEX_DIR/$INDEX does not appear to exist." exit 1 fi
# Get metadata from elasticsearch INDEX_MAPPING=`curl -s -XGET "$ELASTICSEARCH/$INDEX/_mapping"` SETTINGS="{\"settings\":{\"number_of_shards\":$SHARDS,\"number_of_replicas\":$REPLICAS},\"mappings\":$INDEX_MAPPING}"
# Make the tmp directory if it does not already exist. if ! [ -d $TMP_DIR ]; then mkdir -p $TMP_DIR fi
# Tar and gzip the index dirextory. cd $INDEX_DIR nice -n $NICE tar czf $TMP_DIR/$INDEX.tgz $INDEX cd - > /dev/null
# Create a restore script for elasticsearch cat << EOF >> $TMP_DIR/${INDEX}-restore.sh #!/bin/bash # # ${INDEX}-restore.sh - restores elasticsearch index: $INDEX to elasticsearch # instance at $ELASTICSEARCH. This script expects to run in the same # directory as the $INDEX.tgz file.
# Make sure this index does not exist already TEST=\`curl -XGET "$ELASTICSEARCH/$INDEX/_status" 2> /dev/null | grep error\` if [ -z "\$TEST" ]; then echo "Index: $INDEX already exists on this elasticsearch node." exit 1 fi
# Extract index files DOWNLOAD_DIR=\`pwd\` cd $INDEX_DIR if [ -f \$DOWNLOAD_DIR/$INDEX.tgz ]; then # If we have the archive, create the new index in ES curl -XPUT '$ELASTICSEARCH/$INDEX/' -d '$SETTINGS' > /dev/null 2>&1 # Extract the archive in to the INDEX_DIR tar xzf \$DOWNLOAD_DIR/$INDEX.tgz # Restart elasticsearch to allow it to open the new dir and file data $RESTART exit 0 else echo "Unable to locate archive file \$DOWNLOAD_DIR/$INDEX.tgz." exit 1 fi
EOF
# Put archive and restore script in s3. $S3CMD $TMP_DIR/$INDEX.tgz $S3_TARGET/$INDEX.tgz $S3CMD $TMP_DIR/$INDEX-restore.sh $S3_TARGET/$INDEX-restore.sh
# cleanup tmp files if [ -z $PERSIST ]; then rm $TMP_DIR/$INDEX.tgz rm $TMP_DIR/$INDEX-restore.sh fi
#!/bin/bash # elasticsearch-close-old-indices.sh # # Close logstash format indices from elasticsearch maintaining only a # specified number. # http://logstash.net # http://www.elasticsearch.org # # Inspiration: # http://tech.superhappykittymeow.com/?p=296 # # Must have access to the specified elasticsearch node.
usage() { cat << EOF
elasticsearch-close-old-indices.sh
Compares the current list of indices to a configured value and closes any indices surpassing that value. Sort is lexicographical; the first n of a 'sort -r' list are kept, all others are closed.
OPTIONS: -h Show this message -i Indices to keep open (default: 14) -e Elasticsearch URL (default: http://localhost:9200) -g Consistent index name (default: logstash) -o Output actions to a specified file
EXAMPLES:
./elasticsearch-close-old-indices.sh
Connect to http://localhost:9200 and get a list of indices matching 'logstash'. Keep the top lexicographical 14 indices, close any others.
Connect to http://es.example.com:9200 and get a list of indices matching 'my-logs'. Keep the top 28 indices, close any others. When using a custom index naming scheme be sure that a 'sort -r' places the indices you want to keep at the top of the list. Output index closes to /mnt/es/logfile.log.
while getopts ":i:e:g:o:h" flag do case "$flag" in h) usage exit 0 ;; i) if [[ $OPTARG =~ $RE_D ]]; then KEEP=$OPTARG else ERROR="${ERROR}Indexes to keep must be an integer.\n" fi ;; e) ELASTICSEARCH=$OPTARG ;; g) GREP=$OPTARG ;; o) LOGFILE=$OPTARG ;; ?) usage exit 1 ;; esac done
# If we have errors, show the errors with usage data and exit. if [ -n "$ERROR" ]; then echo -e $ERROR usage exit 1 fi
# Get the indices from elasticsearch INDICES_TEXT=`curl -s "$ELASTICSEARCH/_cat/indices?v" | awk '/'$GREP'/{match($0, /[:blank]*('$GREP'.[^ ]+)[:blank]*/, m); print m[1];}' | sort -r`
if [ -z "$INDICES_TEXT" ]; then echo "No indices returned containing '$GREP' from $ELASTICSEARCH." exit 1 fi
# If we are logging, make sure we have a logfile TODO - handle errors here touch $LOGFILE
# Close indices declare -a INDEX=($INDICES_TEXT) if [ ${#INDEX[@]} -gt $KEEP ]; then for index in ${INDEX[@]:$KEEP};do # We don't want to accidentally close everything if [ -n "$index" ]; then echo -n `date "+[%Y-%m-%d %H:%M] "`" Closing index: $index." >> $LOGFILE curl -s -XPOST "$ELASTICSEARCH/$index/_flush" >> $LOGFILE curl -s -XPOST "$ELASTICSEARCH/$index/_close" >> $LOGFILE echo "." >> $LOGFILE fi done fi
#!/usr/bin/env bash # # Delete logstash format indices from elasticsearch maintaining only a # specified number. # # Inspiration: # https://github.com/imperialwicket/elasticsearch-logstash-index-mgmt/blob/master/elasticsearch-remove-old-indices.sh # # Must have access to the specified elasticsearch node.
OPTIONS: -h Show this message -d Expiration date (YYYY-MM-dd) from when we should start deleting the indices (default: 3 months ago) -e Elasticsearch URL (default: http://localhost:9200) -g Consistent index name (default: logstash) -o Output actions to a specified file
EXAMPLES:
./elasticsearch-remove-old-indices.sh
Connect to http://localhost:9200 and get a list of indices matching 'logstash'. Keep the indices from less than 3 months, delete any others.
Connect to http://es.example.com:9200 and get a list of indices matching 'my-logs'. Keep the indices created after the 25 april 1991, delete any others. Output index deletes to /mnt/es/logfile.log.
while getopts ":d:e:g:o:h" flag do case "$flag" in h) usage exit 0 ;; d) if [[ $OPTARG =~ $RE_DATE ]]; then DATE=$OPTARG else ERROR="${ERROR}Expiration date must be YYYY-MM-dd.\n" fi ;; e) ELASTICSEARCH=$OPTARG ;; g) INDEX_NAME=$OPTARG ;; o) LOGFILE=$OPTARG ;; ?) usage exit 1 ;; esac done
# If we have errors, show the errors with usage data and exit. if [ -n "$ERROR" ]; then echo -e $ERROR usage exit 1 fi
# Get the indices from elasticsearch INDICES_TEXT=`curl -s "$ELASTICSEARCH/_cat/indices?v" | awk '/'$INDEX_NAME'/{match($0, /[:blank]*('$INDEX_NAME'.[^ ]+)[:blank]*/, m); print m[1];}' | sort -r`
if [ -z "$INDICES_TEXT" ]; then echo "No indices returned containing '$GREP' from $ELASTICSEARCH." exit 1 fi
# If we are logging, make sure we have a logfile TODO - handle errors here if [ -n "$LOGFILE" ] && ! [ -e $LOGFILE ]; then touch $LOGFILE fi
# Delete indices declare -a INDEX=($INDICES_TEXT) for index in ${INDEX[@]};do # We don't want to accidentally delete everything if [ -n "$index" ]; then INDEX_DATE=$(echo $index | sed -n 's/.*\([0-9]\{4\}\.[0-9]\{2\}\.[0-9]\{2\}\).*/\1/p'| sed 's/\./-/g') if [ $(date -d $DATE +"%Y%m%d") -ge $(date -d $INDEX_DATE +"%Y%m%d") ]; then echo `date "+[%Y-%m-%d %H:%M] "`" Deleting index: $index." >> $LOGFILE curl -s -XDELETE "$ELASTICSEARCH/$index/" >> $LOGFILE fi fi done exit 0
#!/bin/bash # elasticsearch-remove-old-indices.sh # # Delete logstash format indices from elasticsearch maintaining only a # specified number. # http://logstash.net # http://www.elasticsearch.org # # Inspiration: # http://tech.superhappykittymeow.com/?p=296 # # Must have access to the specified elasticsearch node.
usage() { cat << EOF
elasticsearch-remove-old-indices.sh
Compares the current list of indices to a configured value and deletes any indices surpassing that value. Sort is lexicographical; the first n of a 'sort -r' list are kept, all others are deleted.
OPTIONS: -h Show this message -i Indices to keep (default: 14) -e Elasticsearch URL (default: http://localhost:9200) -g Consistent index name (default: logstash) -o Output actions to a specified file
EXAMPLES:
./elasticsearch-remove-old-indices.sh
Connect to http://localhost:9200 and get a list of indices matching 'logstash'. Keep the top lexicographical 14 indices, delete any others.
Connect to http://es.example.com:9200 and get a list of indices matching 'my-logs'. Keep the top 28 indices, delete any others. When using a custom index naming scheme be sure that a 'sort -r' places the indices you want to keep at the top of the list. Output index deletes to /mnt/es/logfile.log.
while getopts ":i:e:g:o:h" flag do case "$flag" in h) usage exit 0 ;; i) if [[ $OPTARG =~ $RE_D ]]; then KEEP=$OPTARG else ERROR="${ERROR}Indexes to keep must be an integer.\n" fi ;; e) ELASTICSEARCH=$OPTARG ;; g) GREP=$OPTARG ;; o) LOGFILE=$OPTARG ;; ?) usage exit 1 ;; esac done
# If we have errors, show the errors with usage data and exit. if [ -n "$ERROR" ]; then echo -e $ERROR usage exit 1 fi
# Get the indices from elasticsearch INDICES_TEXT=`curl -s "$ELASTICSEARCH/_cat/indices?v" | awk '/'$GREP'/{match($0, /[:blank]*('$GREP'.[^ ]+)[:blank]*/, m); print m[1];}' | sort -r`
if [ -z "$INDICES_TEXT" ]; then echo "No indices returned containing '$GREP' from $ELASTICSEARCH." exit 1 fi
# If we are logging, make sure we have a logfile TODO - handle errors here touch $LOGFILE
# Delete indices declare -a INDEX=($INDICES_TEXT) if [ ${#INDEX[@]} -gt $KEEP ]; then for index in ${INDEX[@]:$KEEP};do # We don't want to accidentally delete everything if [ -n "$index" ]; then echo `date "+[%Y-%m-%d %H:%M] "`" Deleting index: $index." >> $LOGFILE curl -s -XDELETE "$ELASTICSEARCH/$index/" >> $LOGFILE fi done fi
#!/bin/bash # # elasticsearch-restore-index.sh # # Retrieve a specified logstash index from s3 and restore with an accompanying # restore script. # http://logstash.net # http://www.elasticsearch.org # https://github.com/s3tools/s3cmd | http://s3tools.org/s3cmd # # Inspiration: # http://tech.superhappykittymeow.com/?p=296 # # Must run on an elasticsearch node with data, the restore script restarts # elasticsearch.
OPTIONS: -h Show this message -b S3 path for backups (Required) -i Elasticsearch index directory (Required) -d Date to retrieve (Required, format: YYYY.mm.dd) -t Temporary directory for download and extract (default: /tmp) -c Command for s3cmd (default: s3cmd get) -e Elasticsearch URL (default: http://localhost:9200) -n How nice tar must be (default: 19)
Get the backup and restore script for the 2013.05.01 index from this s3 bucket and restore the index to the provided elasticsearch index directory.
EOF }
if [ "$USER" != 'root' ] && [ "$LOGNAME" != 'root' ]; then # I don't want to troubleshoot the permissions of others echo "This script must be run as root." exit 1 fi
while getopts ":b:i:t:d:c:e:n:h" flag do case "$flag" in h) usage exit 0 ;; b) S3_BASE=$OPTARG ;; i) INDEX_DIR=$OPTARG ;; t) TMP_DIR=$OPTARG ;; d) DATE=$OPTARG ;; c) S3CMD=$OPTARG ;; e) ELASTICSEARCH=$OPTARG ;; n) if [[ $OPTARG =~ $RE_D ]]; then NICE=$OPTARG fi # If nice is not an integer, just use default ;; ?) usage exit 1 ;; esac done
# We need an S3 base path if [ -z "$S3_BASE" ]; then ERROR="${ERROR}Please provide an s3 bucket and path with -b.\n" fi
# We need an elasticsearch index directory if [ -z "INDEX_DIR" ]; then ERROR="${ERROR}Please provide an Elasticsearch index directory with -i.\n" fi
# We need a date to restore if [ -z "$DATE" ]; then ERROR="${ERROR}Please provide a date for restoration with -d.\n" fi
# If we have errors, show the errors with usage data and exit. if [ -n "$ERROR" ]; then echo -e $ERROR usage exit 1 fi
# Default logstash index naming is hardcoded, as are YYYY-mm container directories. INDEX="logstash-$DATE" YEARMONTH=${DATE//\./-} YEARMONTH=${YEARMONTH:0:7} S3_TARGET="$S3_BASE/$YEARMONTH"
# Get archive and execute the restore script. TODO check file existence first $S3CMD $S3_TARGET/$INDEX.tgz $TMP_DIR/$INDEX.tgz $S3CMD $S3_TARGET/$INDEX-restore.sh $TMP_DIR/$INDEX-restore.sh
if [ -f $TMP_DIR/$INDEX-restore.sh ]; then chmod 750 $TMP_DIR/$INDEX-restore.sh $TMP_DIR/$INDEX-restore.sh
# cleanup tmp files rm $TMP_DIR/$INDEX.tgz rm $TMP_DIR/$INDEX-restore.sh else echo "Unable to find restore script, does that backup exist?" exit 1 fi
# This is a wrapper script for daily run # i.e. you can run it by cron as follows ## m h dom mon dow command # 11 4 * * * /opt/es/es-backup-index.sh >> /var/log/elasticsearch/esindexbackup.log
# Assuming you have the scripts inside '/opt/es/' folder. Or adjust the path to your taste. # # Set your system realities here S3URL="s3://elasticsearch-backups" ESDATA="/mnt/disk2/es/data/elasticsearch/nodes/0/indices/" DAYS=7
# Read through all the available ES indices and generate a list of unique index names # then proceed on all the indices for i in `ls -1 $ESDATA | sed -r -e 's/-+[0-9]{4}\.[0-9]{2}\.[0-9]{2}$//' | uniq` ; do
echo -n " *** Daily index backup for index name '$i' begin: " date /opt/es/elasticsearch-backup-index.sh -b $S3URL -i $ESDATA -g $i
echo -n " *** Close indices for index name '$i' which are > $DAYS days old : " date /opt/es/elasticsearch-close-old-indices.sh -i $DAYS -g $i
echo -n " *** Delete indices for index name '$i' which are > $DAYS days old : " date /opt/es/elasticsearch-remove-old-indices.sh -i $DAYS -g $i echo " ==== Done for index name '$i' ==== " echo " " done
Redis Cluster does not support multiple databases like the stand alone version of Redis. There is just database 0 and the SELECT command is not allowed.
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31367:M 05 May 13:50:37.300 * DB loaded from disk: 576.582 seconds 31367:M 05 May 13:50:37.300 # You can't have keys in a DB different than DB 0 when in Cluster mode. Exiting.
int main(int argc, char **argv) { struct timeval tv; /* We need to initialize our libraries, and the server configuration. */ // 初始化库 #ifdef INIT_SETPROCTITLE_REPLACEMENT spt_init(argc, argv); #endif setlocale(LC_COLLATE,""); zmalloc_enable_thread_safeness(); zmalloc_set_oom_handler(redisOutOfMemoryHandler); srand(time(NULL)^getpid()); gettimeofday(&tv,NULL); dictSetHashFunctionSeed(tv.tv_sec^tv.tv_usec^getpid()); // 检查服务器是否以 Sentinel 模式启动 server.sentinel_mode = checkForSentinelMode(argc,argv); // 初始化服务器 initServerConfig(); /* We need to init sentinel right now as parsing the configuration file * in sentinel mode will have the effect of populating the sentinel * data structures with master nodes to monitor. */ // 如果服务器以 Sentinel 模式启动，那么进行 Sentinel 功能相关的初始化 // 并为要监视的主服务器创建一些相应的数据结构 if (server.sentinel_mode) { initSentinelConfig(); initSentinel(); } // 检查用户是否指定了配置文件，或者配置选项 if (argc >= 2) { int j = 1; /* First option to parse in argv[] */ sds options = sdsempty(); char *configfile = NULL; /* Handle special options --help and --version */ // 处理特殊选项 -h 、-v 和 --test-memory if (strcmp(argv[1], "-v") == 0 || strcmp(argv[1], "--version") == 0) version(); if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-h") == 0) usage(); if (strcmp(argv[1], "--test-memory") == 0) { if (argc == 3) { memtest(atoi(argv[2]),50); exit(0); } else { fprintf(stderr,"Please specify the amount of memory to test in megabytes.\n"); fprintf(stderr,"Example: ./redis-server --test-memory 4096\n\n"); exit(1); } } /* First argument is the config file name? */ // 如果第一个参数（argv[1]）不是以 "--" 开头 // 那么它应该是一个配置文件 if (argv[j][0] != '-' || argv[j][1] != '-') configfile = argv[j++]; /* All the other options are parsed and conceptually appended to the * configuration file. For instance --port 6380 will generate the * string "port 6380\n" to be parsed after the actual file name * is parsed, if any. */ // 对用户给定的其余选项进行分析，并将分析所得的字符串追加稍后载入的配置文件的内容之后 // 比如 --port 6380 会被分析为 "port 6380\n" while(j != argc) { if (argv[j][0] == '-' && argv[j][1] == '-') { /* Option name */ if (sdslen(options)) options = sdscat(options,"\n"); options = sdscat(options,argv[j]+2); options = sdscat(options," "); } else { /* Option argument */ options = sdscatrepr(options,argv[j],strlen(argv[j])); options = sdscat(options," "); } j++; } if (configfile) server.configfile = getAbsolutePath(configfile); // 重置保存条件 resetServerSaveParams(); // 载入配置文件， options 是前面分析出的给定选项 loadServerConfig(configfile,options); sdsfree(options); // 获取配置文件的绝对路径 if (configfile) server.configfile = getAbsolutePath(configfile); } else { redisLog(REDIS_WARNING, "Warning: no config file specified, using the default config. In order to specify a config file use %s /path/to/%s.conf", argv[0], server.sentinel_mode ? "sentinel" : "redis"); } // 将服务器设置为守护进程 if (server.daemonize) daemonize(); // 创建并初始化服务器数据结构 initServer(); // 如果服务器是守护进程，那么创建 PID 文件 if (server.daemonize) createPidFile(); // 为服务器进程设置名字 redisSetProcTitle(argv[0]); // 打印 ASCII LOGO redisAsciiArt(); // 如果服务器不是运行在 SENTINEL 模式，那么执行以下代码 if (!server.sentinel_mode) { /* Things not needed when running in Sentinel mode. */ // 打印问候语 redisLog(REDIS_WARNING,"Server started, Redis version " REDIS_VERSION); #ifdef __linux__ // 打印内存警告 linuxOvercommitMemoryWarning(); #endif // 从 AOF 文件或者 RDB 文件中载入数据 loadDataFromDisk(); // 启动集群？ if (server.cluster_enabled) { if (verifyClusterConfigWithData() == REDIS_ERR) { redisLog(REDIS_WARNING, "You can't have keys in a DB different than DB 0 when in " "Cluster mode. Exiting."); exit(1); } } // 打印 TCP 端口 if (server.ipfd_count > 0) redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port); // 打印本地套接字端口 if (server.sofd > 0) redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket); } else { sentinelIsRunning(); } /* Warning the user about suspicious maxmemory setting. */ // 检查不正常的 maxmemory 配置 if (server.maxmemory > 0 && server.maxmemory < 1024*1024) { redisLog(REDIS_WARNING,"WARNING: You specified a maxmemory value that is less than 1MB (current value is %llu bytes). Are you sure this is what you really want?", server.maxmemory); } // 运行事件处理器，一直到服务器关闭为止 aeSetBeforeSleepProc(server.el,beforeSleep); aeMain(server.el); // 服务器关闭，停止事件循环 aeDeleteEventLoop(server.el); return 0; }