android.os.NetworkOnMainThreadException
在php中如何快速交换数组元素的值
最简单的办法：
list($source[2], $source[1]) = array($source[1], $source[2]);
本文出自 “凡星的技术博客” 博客，请务必保留此出处http://ustb80.blog.51cto.com/6139482/1030880
solr内存配置，solr时区配置
配置文件位置：/etc/default/solr.in.sh
配置内存
SOLR_JAVA_MEM=”-Xms1g -Xmx6g”
这两个配置分别为最小内存和最大内存
配置時區
SOLR_TIMEZONE=”Asia/Shanghai”
其他配置
SOLR_PID_DIR=”/mnt/www/solr”
SOLR_HOME=”/mnt/www/solr/data”
LOG4J_PROPS=”/mnt/www/solr/log4j.properties”
SOLR_LOGS_DIR=”/mnt/www/solr/logs”
SOLR_PORT=”8983″
Increased maximum number of open files to 10032 (it was originally set to 1024).
redis崩溃
git filter-branch 瘦身 爽歪歪
git filter-branch –tree-filter ‘rm release/xxxx-201*’ HEAD
mongodb 3.4 官方资源导航
1. keyfiles内部验证
https://docs.mongodb.com/manual/core/security-internal-authentication/#keyfiles
2. 使用keyfile进行复制集之间的验证
https://docs.mongodb.com/manual/tutorial/enforce-keyfile-access-control-in-existing-replica-set/
3. 用户权限规矩
https://docs.mongodb.com/manual/reference/built-in-roles/#built-in-roles
** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.
https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/
** WARNING: Access control is not enabled for the database.
1. createUser
use admin
db.createUser(
{
user: "root",
pwd: "xxxxxx",
roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
}
)
2. Enable Auth
** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
卸载分区
umount /mnt/mongo
格式化为xfs（会丢失所有数据）
mkfs.xfs /dev/mapper/vg1-lvMongo -f
修改fstab，类型修改为xfs
vim /etc/fstab
change ext4 to xfs
自动挂载
mount -a