cluster_dns_server: 10.43.0.10 # services: etcd: backup_config: enabled: true interval_hours: 12 retention: 6 safe_timestamp: false creation: 12h extra_args: election-timeout: '5000' heartbeat-interval: '500' gid: cluster_dns_server: 10.43.0.10 # services: etcd: backup_config: enabled: true interval_hours: 12 retention: 6 safe_timestamp: false creation: 12h extra_args: election-timeout: 5000 heartbeat-interval: 500 gid: cluster_dns_server: 10.43.0.10 # services: etcd: backup_config: enabled: true interval_hours: 12 retention: 6 safe_timestamp: false creation: 12h 34 extra_args: election-timeout: 5000 heartbeat-interval: 500

html Key rotation “Keys are analogous to the combination of a safe. If a safe combination is known to an adversary, the strongest safe provides no security against penetration. Similarly, poor key

[atguigu@hadoop102 subdir0]$ hdfs dfsadmin -safemode get Safe mode is ON [atguigu@hadoop102 subdir0]$ hdfs dfsadmin -safemode leave Safe mode is OFF （5）观察 http://hadoop102:9870/dfshealth.html#tab-overview 7）案例 3： 需求：模拟等待安全模式 （1）查看当前模式 [atguigu@hadoop102 hadoop-3.1.3]$ hdfs dfsadmin -safemode get Safe mode is OFF （2）先进入安全模式 [atguigu@hadoop102 hadoop-3.1.3]$ bin/hdfs dfsadmin -safemode enter （4）再打开一个窗口，执行 [atguigu@hadoop102 hadoop-3.1.3]$ bin/hdfs dfsadmin -safemode leave （5）再观察上一个窗口 Safe mode is OFF （6）HDFS 集群上已经有上传的数据了 6.3 慢磁盘监控 “慢磁盘”指的时写入数据非常慢的一类磁盘。其实慢性磁盘并不少见，当机器运行时 间长了，上

about a dog and cat, but we know that they are both cute, have been domesticated for a while and are safe. These two animals are more similar to each other than to a random animal like a chimp. Similarly extremely dangerous, even though stuffed teddy bears have conditioned us into thinking that they might be safe and cute. A raccoon can seem to be cute (remember Rocket the raccoon from Guardians of the Galaxy x-axis, and the feature ‘dangerous’ occupies the y-axis. The animals on the bottom-right are cute and safe to play with. The dangerous animals occupy the top-left area of the plot. Note how we have compressed

RAM. So, as a rule of thumb, if you have 1 GB of RAM or more in your host computer, it is usually safe to allocate 512 MB to each VM. But, in any case, make sure you always have at least 256 to 512 MB basic Direct3D acceleration to work in a Windows Guest, you have to install the Guest Additions in “Safe Mode”. This does not apply to the experimental WDDM Direct3D video driver available for Vista and acceleration as an option that must be explicitly enabled. Also, you must install the Guest Additions in “Safe Mode”. This does not apply to the experimental WDDM Direct3D video driver available for Vista and

IMachine::detachDevice() call if it is made before IMachine::saveSettings(). This implicit deletion is safe because newly created differencing hard disks do not contain any user data. However, keep in mind 216.1.18 supportedChannels (read-only) UpdateChannel IUpdateAgent::supportedChannels[] Returns a safe array of all supported update channels this agents offers. cccxciv Classes (interfaces) 216.2 checkFor MidntBSDUnknown Unknown MidnightBSD partition. OpenBSDData OpenBSD data partition. QNXPowerSafeFS QNX power-safe file system partition. Plan9 Plan 9 partition. VMWareVMKCore VMWare ESX coredump partition. VMWareVMFS

IMachine::detachDevice() call if it is made before IMachine::saveSettings(). This implicit deletion is safe because newly created differencing hard disks do not contain any user data. However, keep in mind 206.1.18 supportedChannels (read-only) UpdateChannel IUpdateAgent::supportedChannels[] Returns a safe array of all supported update channels this agents offers. 367 5 Classes (interfaces) 5.206.2 checkFor MidntBSDUnknown Unknown MidnightBSD partition. OpenBSDData OpenBSD data partition. QNXPowerSafeFS QNX power-safe file system partition. Plan9 Plan 9 partition. VMWareVMKCore VMWare ESX coredump partition. VMWareVMFS

IMachine::detachDevice() call if it is made before IMachine::saveSettings(). This implicit deletion is safe because newly created differencing hard disks do not contain any user data. However, keep in mind 203.1.18 supportedChannels (read-only) UpdateChannel IUpdateAgent::supportedChannels[] Returns a safe array of all supported update channels this agents offers. 393 5 Classes (interfaces) 5.203.2 checkFor MidntBSDUnknown Unknown MidnightBSD partition. OpenBSDData OpenBSD data partition. QNXPowerSafeFS QNX power-safe file system partition. Plan9 Plan 9 partition. VMWareVMKCore VMWare ESX coredump partition. 461

IMachine::detachDevice() call if it is made before IMachine::saveSettings(). This implicit deletion is safe because newly created differencing hard disks do not contain any user data. However, keep in mind 216.1.18 supportedChannels (read-only) UpdateChannel IUpdateAgent::supportedChannels[] Returns a safe array of all supported update channels this agents offers. cccxciv Classes (interfaces) 216.2 checkFor MidntBSDUnknown Unknown MidnightBSD partition. OpenBSDData OpenBSD data partition. QNXPowerSafeFS QNX power-safe file system partition. Plan9 Plan 9 partition. VMWareVMKCore VMWare ESX coredump partition. VMWareVMFS

RAM. So, as a rule of thumb, if you have 1 GB of RAM or more in your host computer, it is usually safe to allocate 512 MB to each VM. But, in any case, make sure you always have at least 256 to 512 MB basic Direct3D acceleration to work in a Windows Guest, you have to install the Guest Additions in “Safe Mode”. This does not apply to the experimental WDDM Direct3D video driver available for Vista and acceleration as an option that must be explicitly enabled. Also, you must install the Guest Additions in “Safe Mode”. This does not apply to the experimental WDDM Direct3D video driver available for Vista and