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From Nikolay Mihaylov <n...@nmmm.nu>
Subject running cassandra on 8 GB servers
Date Thu, 11 Apr 2013 19:35:51 GMT
For one project I will need to run cassandra on following dedicated servers:

Single CPU XEON 4 cores no hyper-threading, 8 GB RAM, 12 TB locally
attached HDD's in some kind of RAID, visible as single HDD.

I can do cluster of 20-30 such servers, may be even more.

The data will be huge, I am estimating 4-6 TB per server. I know this is
best, but those are my resources.

Currently I am testing with one of such servers, except HDD is 300 GB.
Every 15-20 hours, I get out of heap memory, e.g. something like:

ERROR [Thrift:641] 2013-04-11 11:25:19,563 CassandraDaemon.java (line 164)
Exception in thread Thread[Thrift:641,5,main]
...
 INFO [StorageServiceShutdownHook] 2013-04-11 11:25:39,915
ThriftServer.java (line 116) Stop listening to thrift clients
 INFO [StorageServiceShutdownHook] 2013-04-11 11:25:39,943 Gossiper.java
(line 1077) Announcing shutdown
 INFO [StorageServiceShutdownHook] 2013-04-11 11:26:08,613
MessagingService.java (line 682) Waiting for messaging service to quiesce
 INFO [ACCEPT-/208.94.232.37] 2013-04-11 11:26:08,655 MessagingService.java
(line 888) MessagingService shutting down server thread.
ERROR [Thrift:721] 2013-04-11 11:26:37,709 CustomTThreadPoolServer.java
(line 217) Error occurred during processing of message.
java.util.concurrent.RejectedExecutionException: ThreadPoolExecutor has
shut down

Anyone have some advices about better utilization of such servers?

Nick.

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