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From "Hiller, Dean" <Dean.Hil...@nrel.gov>
Subject Re: running cassandra on 8 GB servers
Date Fri, 12 Apr 2013 12:02:16 GMT
Hmmm, what is the recommendation for a 10G network if 1G was 300G to
500GŠI am guessing I can't do 10 times that, correct?  But maybe I could
squeak out 600G to 1T?

Thanks,
Dean

On 4/11/13 2:26 PM, "aaron morton" <aaron@thelastpickle.com> wrote:

>> The data will be huge, I am estimating 4-6 TB per server. I know this
>>is best, but those are my resources.
>You will have a very unhappy time.
>
>The general rule of thumb / guideline for a HDD based system with 1G
>networking is 300GB to 500Gb per node. See previous discussions on this
>topic for reasons.
> 
>> 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
>What was the error ?
>
>What version are you using?
>If you have changed any defaults for memory in cassandra-env.sh or
>cassandra.yaml revert them. Generally C* will do the right thing and not
>OOM, unless you are trying to store a lot of data on a node that does not
>have enough memory. See this thread for background
>http://www.mail-archive.com/user@cassandra.apache.org/msg25762.html
>
>Cheers
>
>-----------------
>Aaron Morton
>Freelance Cassandra Consultant
>New Zealand
>
>@aaronmorton
>http://www.thelastpickle.com
>
>On 12/04/2013, at 7:35 AM, Nikolay Mihaylov <nmmm@nmmm.nu> wrote:
>
>> 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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