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The following is part 1 of a 4 part series that will go over an installation and configuration of Pacemaker, Corosync, Apache, DRBD and a VMware STONITH agent. The aim …
Active/Passive Cluster With Pacemaker, Corosync and DRBD on CentOS 7: Part 1 – Cluster Installation Read More二、MooseFS的详解 1、MooseFS的优点 1）部署简单，轻量、易配置、易维护 2）易于扩展，支持在线扩容，不影响业务，体系架构可伸缩性极强 3）通用文件系统，不需要修改上层应用就可以使用（比那些需要专门api的dfs方便多了）。 4）以文件系统方式展示:如存图片，虽然存储在chunkserver上的数据是二进制文件，但是在挂载mfs的client端仍旧以图片文件形式展示，便于数据备份 5）硬盘利用率高。测试需要较大磁盘空间 6）可设置删除的空间回收时间，避免误删除文件丢失就恢复不及时影响业务 7）系统负载，即数据读写分配到所有的服务器上 8）可设置文件备份的副本数量，一般建议3份，未来硬盘容量也要是存储单份的容量的三倍 2、MooseFS的缺点 1）master目前是单点（虽然会把数据信息同步到备份服务器，但是恢复需要时间，因此，会影响上线，针对这个问题， 可以通过DRBD+Corosync+Pacemaker方案解决） 2）元数据服务器对主机的内存要求略高，所以元数据服务器硬件配置要高，尤其是内存 3、MooseFS文件系统结构 1）管理服务器 Master Server（Master） 2）元数据日志服务器 Metalogger Server(Metalogger) 3）数据存储服务器 Data Servers (Chunkservers) 4）客户端 Client 4、MooseFS各角色说明 1）Master管理服务器 有时也称为元数据服务器，负责管理各个数据存储服务器，调度文件读写，回收文件空间以及恢复多节点拷贝。目前MFS只支持一个元数据服务器master，这是一个单点故障，需要一个性能稳定的服务器来充当。希望今后MFS能支持多个master服务器，进一步提高系统的可靠性。 …
MooseFS: About Read Morehttps://github.com/Zimbra-Community/zimbra-foss-2fa https://github.com/Zimbra-Community/owncloud-zimlet https://github.com/Zimbra-Community/account-history
zimbra Options Read MoreLinux 1. run dd if=/dev/zero of=/zerofile & 2. wait until disk end up 3. run rm -rf /zerofile 4. stop vm 5. at ZSTACK …
ZSTACK : Shrink Disk Size Read Morezstack-ctl restore_mysql -f zstack-backup-db-2020-07-22_18-39-00.gz –mysql-root-password zstack.mysql.password zstack-ctl dump_mysql –file-name zstack zsha2 show-config
zstack-ctl Read MoreIntroduction In many cases it can become cumbersome to transfer files to and from a droplet. Imagine a development usage scenario where you are coding apps remotely and find yourself …
How To Use SSHFS to Mount Remote File Systems Over SSH Read More{ “error”: { “code”: “HOST.1002”, “description”: “Unable to reconnect host”, “details”: “connection error for KVM host[uuid:8358b7413b754dbd8ed8e50cbbadd93f, ip:10.1.13.2]”, “cause”: { “code”: “HOST.1002”, “description”: “Unable to reconnect host”, “details”: “connection error …
zstack can’t connect Host Read MoreSome programs like Apache and MySQL require a higher number of file descriptors.This is how you can increase that limit for all users in CentOS 7Note: Commands require root access …
Centos : Extend LIMIT to fs Read Moreİlk Üyelik Bonusu Veren Sitelerde Bonus Şartları Doğru bilgilere ulaşmak için lütfen tıkla! İlk üyelik bonusu hakkında bilmeniz gerekenler, avantajları ve kullanım şartları. Daha fazla kazanç elde etmek için ipuçları.İlk …
İlk Üyelik Bonusu Veren Sitelerde Bonus Şartları Read More