zookeeper定时清理log
在zookeeper的目录下新建一个脚本，内容如下（zookeeper bin下面也有zkCleanup.sh脚本，原理一样，都是调用java类）shell_dir=$(cd "$(dirname "$0")"; pwd)
cd $shell_dir && java -cp zookeeper-3.4.5.jar:lib/log4j-1.2.15.jar:lib/slf4j-api-1.6.1.jar:lib/slf4j-log4j12-1.6.1.jar:conf/log4j.properties org.apache.zookeeper.server.PurgeTxnLog /zoo-datadir/ /zoo-datadir/ -n 5
其中/zoo-datadir对应dataDir和dataLogDir，-n代表保留的snapshot的数量，默认是3，加入crontab，每天执行crontab -e
0 */1 * * * /root/zookeeper/zookeeper-3.4.5/purgeTxnLog.sh
service crond restart
如果是zookeeper3.4之后的版本，可以通过修改zoo.cfg配置文件的形式，zookeeper自动清理
# The number of snapshots to retain in dataDir
autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
autopurge.purgeInterval=1
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