Re: [ceph-users] Predict performance

2015-10-02 Thread Javier C . A .
A classic raid5 system takes a looong time to rebullid the raid, so i would say NO, but how long does it take for ceph to rebullid the placement group? J > El 2 oct 2015, a las 12:01, Simon Hallam escribió: > > The way I look at it is: > > Would you normally put 18*2TB disks in a single RAI

Re: [ceph-users] Predict performance

2015-10-02 Thread Javier C . A .
Christian thank you so much for your answer. You're right, when I say Performance, I actually mean the "classic FIO test". Regarding the CPU, you meant 2Ghz per OSD and per CPU CORE, isn't? One last question, with a total number of 18xOSD (2TB/OSD), and a replica factor of 2, is it really ris

[ceph-users] Predict performance

2015-10-02 Thread Javier C . A .
Hello Before posting this message, I've been reading older posts in the mailing list, but I didn't get any clear answer. I happen to have three servers available to test Ceph, and I would like to know if there is any kind of "performance prediction formula". -My OSD servers are: - 1 x Intel