[HPDD-discuss] Number of Cores and Memory

Hi all, We are in the process of migrating our lustre cluster from 1.8.5 to 2.4.X which also involves changing hardware for servers (1 MDS + 2 OSS). Nowadays we have 8 core (2 * 4) servers (all three) with 16 Gb of RAM, and we have the option to substitute them by (1 * 4) core servers or (2 * 6 ) core servers with at least 32 Gb of RAM. The Lustre file system is of 64 TB: 8 TB * 8 OSTs, 90% in use, but an MDT of 750 MB in size Taking into account that we tend to use big files in size, would it be of any help having an MDS with 2 * 6 cores with 64 GB of RAM MDS more than 4 cores (1 * 4) and 32 GB of RAM with Lustre 2.4.X? And what about the OSSs?. Would it be more interesting having 12 cores (6 * 2) instead of 4 (4 * 1)? I read the interesting Whamcloud paper 'Lustre OSS and MDS Server Node Requirements', which treats this issue, but I would like to comment to the list as I can not see clearly if in our case it is worth to put about an additional 100% of money in cores and memory Any advice or suggestion will be welcomed Regards -- Ramiro Alba Centre Tecnològic de Tranferència de Calor http://www.cttc.upc.edu Escola Tècnica Superior d'Enginyeries Industrial i Aeronàutica de Terrassa Colom 11, E-08222, Terrassa, Barcelona, Spain Tel: (+34) 93 739 8928 -- Aquest missatge ha estat analitzat per MailScanner a la cerca de virus i d'altres continguts perillosos, i es considera que est� net.