[Hadoop Wiki] Update of "BookKeeperPerfPage" by FlavioJunqueira

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The "BookKeeperPerfPage" page has been changed by FlavioJunqueira.
http://wiki.apache.org/hadoop/BookKeeperPerfPage

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New page:
= BookKeeper Performance Figures =

The numbers we present in this page have been obtained in a cluster of machines with the following characteristics: one Xeon dual-core 2.1GHz processor, 4GB of RAM, gigabit ethernet, and two SATA hard drives.

== Single-client experiments ==

We run a client against an ensemble of bookies. We use x-y to the denote the configuration used, where x is the total number of bookies and y is the quorum size.

|| || 128 bytes per entry written || 1024 bytes written per entry ||
|| 3-2 || 20.57 Kops/s || 20.52 Kops/s ||
|| 4-2 || 28.99 Kops/s || 22.51 Kops/s ||
|| 5-2 || 39.02 Kops/s || 23.54 Kops/s ||
|| 6-2 || 41.70 Kops/s || 23.79 Kops/s ||


|| || 128 bytes per entry written || 1024 bytes written per entry ||
|| 4-3 || 23.52 Kops/s || 15.15 Kops/s ||
|| 5-3 || 30.01 Kops/s || 16.77 Kops/s ||
|| 6-3 || NA Kops/s || 17.62 Kops/s ||

== Multi-client experimets ==

15 clients writing to bookies simultaneously.

|| || 128 bytes per entry written || 1024 bytes written per entry ||
|| 4-2 || 189.59 Kops/s || NA Kops/s ||
|| 6-2 || 215.02 Kops/s || NA Kops/s ||


(I'll be posting the numbers for NA cells soon.)