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From Flavio Junqueira <...@yahoo-inc.com>
Subject Re: [ANNOUNCE] Apache ZooKeeper 3.1.0
Date Fri, 20 Feb 2009 09:05:32 GMT
Hi Bill, I'm sorry, I missed this message initially. I'm sending below  
a table that gives you throughput figures for BookKeeper. The rows  
correspond to distinct BookKeeper configuration (ensemble size, quorum  
size, entry type), and the columns to different values for the length  
of an entry in bytes. The throughput values correspond to one client  
writing 400K records (we call them entries) asynchronously to a  
ledger.  Finally, the table shows write throughput in thousands of  
operations per second.

	        128	       1024	        8192
3-2-V	32.80	26.45	5.89
4-2-V	41.72	31.53	6.55
5-2-V	46.89	32.45	6.61

4-3-G	28.02	21.61	4.37
5-3-G	34.91	28.22	4.60
6-3-G	41.22	31.70	4.55

Let me know if you have more questions, I appreciate your interest.


On Feb 14, 2009, at 2:56 PM, Bill de hOra wrote:

> Patrick Hunt wrote:
>> A bit about BookKeeper: a system to reliably log streams of  
>> records. In BookKeeper, servers are "bookies", log streams are  
>> "ledgers", and each unit of a log (aka record) is a "ledger entry".  
>> BookKeeper is designed to be reliable; bookies, the servers that  
>> store ledgers can be byzantine, which means that some subset of the  
>> bookies can fail, corrupt data, discard data, but as long as there  
>> are enough correctly behaving servers the service as a whole  
>> behaves correctly; the meta data for BookKeeper is stored in  
>> ZooKeeper.
> Hi Patrick,
> this sounds cool. Are there any figures on throughput, ie how many  
> records BookKeeper can process per second?
> Bill

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