[Beowulf] storage server hardware considerations
jan.heichler at gmx.net
Wed Jul 15 12:31:50 PDT 2009
Mittwoch, 15. Juli 2009, meintest Du:
>> Can you give a bit more Info?
>> Network Storage Server = NFS?
OP> NFS, though I'm open for trying other options.
Well...NFS is a good start... if 100 MB/s is enough for your purposes.
NFS does not work very well on higher speeds - the protocoll seems to
have quite some overhead.
>> Why SSDs?
OP> Performance per watt, $? I'm happy to be corrected.
Well. SSD is very expensive - and not necessarily more energy
I would vote for 2.5" SATA drives. With the Supermicro SC216 for
example you can have 24 disks. Add a 3ware 9650SE-24 to build a
>> What speed do you want to reach?
OP> I'd be happy with saturating 1 GigE ( ~ 100MB/s ?) to start, with some
OP> headroom. Don't want to break the bank though for the last bit of
To reach 100 MB/s you can probably start with 8+2 disks in a RAID6.
That should give you enough to saturate a single 1GE link.
>> In general: RAM does help, CPU power is normally not necessary.
OP> That's my feeling, but wondering how low on the cpu to go. Is a dual
OP> (physical) processor system a help?
Well... single socket, dualcore is perfectly fine to saturate a 1GE
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