8:36 p.m.
On 2014-06-02 12:15, E.S. Rosenberg wrote:
On Mon, Jun 2, 2014 at 1:03 PM, Ramiro Alba <raq(a)cttc.upc.edu>
wrote:
> 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).
Small question, why are you moving to 2.4.x and not to 2.5.x which is
supposed to be the "long support" release now?
We are in test period. The upgrade will be done in October/November, so
we will upgrade to the maintenance release at that moment. I did not
know if 2.5.X would it the one to choose, so I did take a conservative
approach. That's all.
> 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 [1]
>
> Escola Tècnica Superior d'Enginyeries
> Industrial i Aeronàutica de Terrassa
> Colom 11, E-08222, Terrassa, Barcelona, Spain
> Tel: (+34) 93 739 8928 [2]
>
> --
> Aquest missatge ha estat analitzat per MailScanner
> a la cerca de virus i d'altres continguts perillosos,
> i es considera que està net.
>
> _______________________________________________
> HPDD-discuss mailing list
> HPDD-discuss(a)lists.01.org
> https://lists.01.org/mailman/listinfo/hpdd-discuss [3]
--
Aquest missatge ha estat analitzat per MAILSCANNER [4]
a la cerca de virus i d'altres continguts perillosos,
i es considera que está net.
Links:
------
[1] http://www.cttc.upc.edu
[2] tel:%28%2B34%29%2093%20739%208928
[3] https://lists.01.org/mailman/listinfo/hpdd-discuss
[4] http://www.mailscanner.info/
--
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.