Hello Binh, The column requests tells you how many requests were served during the last statistics interval (1s in your case, because of -T 1). The actual throughput is the second column, rps (requests per second).
The command you ran is used to estimate the maximum throuhput (rps) you can achieve, probably violating the QoS requirements. Once you determine the peak throughput, you should run the following command: ./loader -a ../twitter_dataset/twitter_dataset_30x -s servers.txt -g 0.8 -T 1 -c 200 -w 8 -e -r $rps where rps corresponds to about 90% of the peak throughput you achieved using the first command. You should experiment and tweak this number to achieve the maximum throughput while preserving the QoS. I added some explanations about it. Please take a look again at the benchmark web page. Your throughput seems quite low. What machine you run this benchmark on? Regards, Djordje ________________________________________ From: Binh Q. Pham [[email protected]] Sent: Thursday, July 11, 2013 3:20 AM To: [email protected] Subject: Re: [cloudsuite] Maximum throughput in data caching? Hi all, I am having problems intepreting the memcached-client output in order to identify the maximum throughput while running the following command: ./loader -a ../twitter_dataset/twitter_dataset_30x -s servers.txt -g 0.8 -T 1 -c 200 -w 8 This is the sample output: timeDiff, rps, requests, gets, sets, hits, misses, avg_lat, 90th, 95th, 99th, std, min, max, avgGetSize 1.000001, 1357.0, 1357, 1066, 291, 799, 267, 25447.244405, 26000.000000, 26000.000000, 26000.000000, 47.833958, 23695.255280, 25452.135086, 582.585366 Outstanding requests per worker: 6485 22607 count 0 count 0 count 0 According to the explaination, the maximum throughput is the "maximum number of requests per second achieved". So I guess the number under column "requests" is the throughput? If so, I have been waiting for half an hour but the number under that column never reached a steady state, and it even went back to 0. That's why I am confused and hope someone can clarify this for me. Thanks, Binh
