一周一个中间件-ES搜索引擎 (9)

discovery.seed_hosts: [“10.150.55.94:9301”, “10.150.55.95:9301”,“10.150.30.246:9301”]
#Elasticsearch7新增参数,写入候选主节点的设备地址,来开启服务时就可以被选为主节点,由discovery.zen.ping.unicast.hosts:参数改变而来

cluster.initial_master_nodes: [“10.150.55.94:9301”, “10.150.55.95:9301”,“10.150.30.246:9301”]
#Elasticsearch7新增参数,写入候选主节点的设备地址,来开启服务时就可以被选为主节点

cluster.fault_detection.leader_check.interval: 15s
#Elasticsearch7新增参数,设置每个节点在选中的主节点的检查之间等待的时间。默认为1秒

discovery.cluster_formation_warning_timeout: 30s
#Elasticsearch7新增参数,启动后30秒内,如果集群未形成,那么将会记录一条警告信息,警告信息未master not fount开始,默认为10秒

cluster.join.timeout: 30s
#Elasticsearch7新增参数,节点发送请求加入集群后,在认为请求失败后,再次发送请求的等待时间,默认为60秒

cluster.publish.timeout: 90s
#Elasticsearch7新增参数,设置主节点等待每个集群状态完全更新后发布到所有节点的时间,默认为30秒

cluster.routing.allocation.cluster_concurrent_rebalance: 32
#集群内同时启动的数据任务个数,默认是2个

cluster.routing.allocation.node_concurrent_recoveries: 32
#添加或删除节点及负载均衡时并发恢复的线程个数,默认4个

cluster.routing.allocation.node_initial_primaries_recoveries: 32
#初始化数据恢复时,并发恢复线程的个数,默认4个
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原文链接:https://blog.csdn.net/qq_31547771/article/details/100665922
```
所有节点统一修改一下jvm.options
```
## JVM configuration

################################################################
## IMPORTANT: JVM heap size
################################################################
##
## You should always set the min and max JVM heap
## size to the same value. For example, to set
## the heap to 4 GB, set:
##
## -Xms4g
## -Xmx4g
##
## See https://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html
## for more information
##
################################################################

# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
# 最重要的修改
-Xms2g
-Xmx2g

################################################################
## Expert settings
################################################################
##
## All settings below this section are considered
## expert settings. Don't tamper with them unless
## you understand what you are doing
##
################################################################

## GC configuration
-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly

## G1GC Configuration
# NOTE: G1GC is only supported on JDK version 10 or later.
# To use G1GC uncomment the lines below.
# 10-:-XX:-UseConcMarkSweepGC
# 10-:-XX:-UseCMSInitiatingOccupancyOnly
# 10-:-XX:+UseG1GC
# 10-:-XX:InitiatingHeapOccupancyPercent=75

## DNS cache policy
# cache ttl in seconds for positive DNS lookups noting that this overrides the
# JDK security property networkaddress.cache.ttl; set to -1 to cache forever
-Des.networkaddress.cache.ttl=60
# cache ttl in seconds for negative DNS lookups noting that this overrides the
# JDK security property networkaddress.cache.negative ttl; set to -1 to cache
# forever
-Des.networkaddress.cache.negative.ttl=10

## optimizations

# pre-touch memory pages used by the JVM during initialization
-XX:+AlwaysPreTouch

## basic

# explicitly set the stack size
-Xss1m

# set to headless, just in case
-Djava.awt.headless=true

# ensure UTF-8 encoding by default (e.g. filenames)
-Dfile.encoding=UTF-8

# use our provided JNA always versus the system one
-Djna.nosys=true

# turn off a JDK optimization that throws away stack traces for common
# exceptions because stack traces are important for debugging
-XX:-OmitStackTraceInFastThrow

# flags to configure Netty
-Dio.netty.noUnsafe=true
-Dio.netty.noKeySetOptimization=true
-Dio.netty.recycler.maxCapacityPerThread=0

# log4j 2
-Dlog4j.shutdownHookEnabled=false
-Dlog4j2.disable.jmx=true

-Djava.io.tmpdir=${ES_TMPDIR}

## heap dumps

# generate a heap dump when an allocation from the Java heap fails
# heap dumps are created in the working directory of the JVM
-XX:+HeapDumpOnOutOfMemoryError

# specify an alternative path for heap dumps; ensure the directory exists and
# has sufficient space
-XX:HeapDumpPath=data

# specify an alternative path for JVM fatal error logs
-XX:ErrorFile=logs/hs_err_pid%p.log

## JDK 8 GC logging

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