Hi! And so, in your math I need to build size = osd, 30 replicas for my cluster of 120TB - to get my demans???? And 4TB real storage capacity in price 3000$ per 1TB? Joke? All the best, Shneur ________________________________________ From: Johannes Formann <mlmail@xxxxxxxxxx> Sent: Tuesday, July 28, 2015 12:46 PM To: Shneur Zalman Mattern Subject: Re: Did maximum performance reached? Hi, size=3 would decrease your performance. But with size=2 your results are not bad too: Math: size=2 means each write is written 4 times (2 copies, first journal, later disk). Calculating with 1.300MB/s „Client“ Bandwidth that means: 2 (size) * 1300 MB/s / 6 (SSD) => 433MB/s each SSD 2 (size) * 1300 MB/s / 30 (HDD) => 87MB/s each HDD greetings Johannes ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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