Greenplum数据库集群

Posted 2022-04-07 buxuxiao

Greenplum数据库集群

 

首选操作系统

Red Hat Enterprise Linux (RHEL)是首选操作系统。应该使用最新的受支持的主版本，当前是RHEL 6。

我使用的系统版本：centos7.6

文件系统

XFS是Greenplum数据库数据目录的最佳实践文件系统。XFS应该用下列选项挂载：

##官方推荐
rw,noatime,inode64

我的实际配置：

cat /etc/fstab
/dev/mapper/centos-home /home                   xfs     nodev,noatime,nobarrier,inode64       0 0

端口配置

ip_local_port_range应该被设置为不与Greenplum数据库端口范围冲突。例如：

##官方推荐
net.ipv4.ip_local_port_range = 3000         65535
##官方推荐gp配置对比
PORT_BASE=2000
MIRROR_PORT_BASE=2100
REPLICATION_PORT_BASE=2200
MIRROR_REPLICATION_PORT_BASE=2300

　　我实际使用

cat /etc/sysctl.conf |grep -v -E "^#|^$"
kernel.shmmax = 500000000
kernel.shmmni = 4096
kernel.shmall = 4000000000
kernel.sem = 500 1024000 200 4096
kernel.sysrq = 1
kernel.core_uses_pid = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.msgmni = 2048
net.ipv4.tcp_syncookies = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_max_syn_backlog = 4096
net.ipv4.conf.all.arp_filter = 1
net.ipv4.ip_local_port_range = 10000 65535
net.core.netdev_max_backlog = 10000
net.core.rmem_max = 2097152
net.core.wmem_max = 2097152
vm.overcommit_memory = 2
vm.swappiness = 10
vm.dirty_expire_centisecs = 500
vm.dirty_writeback_centisecs = 100
vm.dirty_background_ratio = 0
vm.dirty_ratio=0
vm.dirty_background_bytes = 1610612736
vm.dirty_bytes = 4294967296

cat /home/gpadmin/gpinitsystem_config |grep -v -E "^#|^$"
ARRAY_NAME="Zenlayer Greenplum DW"
SEG_PREFIX=gpseg
PORT_BASE=40000
declare -a DATA_DIRECTORY=(/home/gpdata/primary /home/gpdata/primary)
MASTER_HOSTNAME=gp2-master.sin3
MASTER_DIRECTORY=/home/gpdata/master
MASTER_PORT=5234
TRUSTED_SHELL=ssh
CHECK_POINT_SEGMENTS=8
ENCODING=UNICODE
MIRROR_PORT_BASE=50000
REPLICATION_PORT_BASE=41000
MIRROR_REPLICATION_PORT_BASE=51000
declare -a MIRROR_DATA_DIRECTORY=(/home/gpdata/mirror /home/gpdata/mirror)
DATABASE_NAME=zenlayer_db

　　

明显实际有冲突，无大碍，