当我尝试通过 yum 手动安装代理时，正在安装最新版本的代理而不是我当前使用的版本，我如何安装我想要的代理版本我需要在 datastax 存储库中指定任何内容吗？
我尝试通过 opscenter 安装，但无法连接。为了让 opscenter 能够登录到我提供用户名、密码的节点，我将整个私钥文件 (.ppk) 粘贴到 opscenter 登录凭据中，我做错了吗？？
所以我们在两晚前有一个节点出现故障，并且花了一天的大部分时间将其恢复。我还在学习，所以我不熟悉修复选项，但基于这里的文章：http ://www.datastax.com/dev/blog/repair-service-opsc4
我可以只启用维修服务吗？这是否消除了手动运行 nodetool repair 的需要，这很痛苦，因为它是手动的，而且显然 I/O 非常密集，这让我很担心。
此外，假设此服务在本文中描述的真实世界中工作，我是否可以确信以建议的时间间隔启动服务不会导致性能问题？
尝试修复密钥空间时遇到问题：
myuser@host-1:~$ nodetool repair -pr mykeyspace
[2014-11-07 13:33:10,132] Starting repair command #13, repairing 1 ranges for keyspace mykeyspace
[2014-11-07 13:33:20,668] Repair session 3baeeb40-667a-11e4-a6e9-3562b4c30e9e for range (-3651079129967449,-2] failed with error java.io.IOException: Failed during snapshot creation.
[2014-11-07 13:33:20,668] Repair command #13 finished
当我看着system.log它host-1说：
ERROR [RepairJobTask:1] 2014-11-07 13:33:20,665 RepairJob.java (line 125) Error occurred during snapshot phase
java.lang.RuntimeException: Could not create snapshot at /X.X.X.33
at org.apache.cassandra.repair.SnapshotTask$SnapshotCallback.onFailure(SnapshotTask.java:81)
at org.apache.cassandra.net.MessagingService$5$1.run(MessagingService.java:344)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
ERROR [AntiEntropySessions:12] 2014-11-07 13:33:20,666 RepairSession.java (line 288) [repair #3baeeb40-667a-11e4-a6e9-3562b4c30e9e] session completed with the following error
java.io.IOException: Failed during snapshot creation.
at org.apache.cassandra.repair.RepairSession.failedSnapshot(RepairSession.java:323)
at org.apache.cassandra.repair.RepairJob$2.onFailure(RepairJob.java:126)
at com.google.common.util.concurrent.Futures$4.run(Futures.java:1160)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
ERROR [AntiEntropySessions:12] 2014-11-07 13:33:20,667 CassandraDaemon.java (line 199) Exception in thread Thread[AntiEntropySessions:12,5,RMI Runtime]
java.lang.RuntimeException: java.io.IOException: Failed during snapshot creation.
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:32)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed during snapshot creation.
at org.apache.cassandra.repair.RepairSession.failedSnapshot(RepairSession.java:323)
at org.apache.cassandra.repair.RepairJob$2.onFailure(RepairJob.java:126)
at com.google.common.util.concurrent.Futures$4.run(Futures.java:1160)
... 3 more
ERROR [Thread-1607] 2014-11-07 13:33:20,668 StorageService.java (line 2599) Repair session 3baeeb40-667a-11e4-a6e9-3562b4c30e9e for range (-3651079129967449,-2] failed with error java.io.IOException: Failed during snapshot creation.
java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.io.IOException: Failed during snapshot creation.
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.cassandra.service.StorageService$4.runMayThrow(StorageService.java:2591)
at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: java.io.IOException: Failed during snapshot creation.
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:32)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
... 1 more
Caused by: java.io.IOException: Failed during snapshot creation.
at org.apache.cassandra.repair.RepairSession.failedSnapshot(RepairSession.java:323)
at org.apache.cassandra.repair.RepairJob$2.onFailure(RepairJob.java:126)
at com.google.common.util.concurrent.Futures$4.run(Futures.java:1160)
... 3 more
当我查看日志时，X.X.X.33我看不到任何日志错误。
谁能给我指点正确的方向？