From my experience (production service) NFS is better than lustre in single server configuration.
On 11 Jun 2008, at 15:16, Enrico Morelli wrote: > On Wed, 11 Jun 2008 08:54:41 -0400 > "Brian J. Murrell" <[EMAIL PROTECTED]> wrote: > >> On Wed, 2008-06-11 at 09:49 +0200, Enrico Morelli wrote: >>> >>> The lustre server (MDS and OSS) is an HP DL380 G5 (Dual Xeon 5130 >>> 2GHz, 2GB RAM) connected through an HP P800 Sata/SAS controller to >>> an HP MSA60 storage equipped with 7x500GB SATA disk in RAID 6. >> >> So you have one single RAID6 volume that you have sliced up for the >> MDT and OSTs? >> >> That configuration is going to provide a lot of contention between >> the >> MDT and OSTs as you have created a single "device" for everything and >> are losing out on the possibilities of parallelism. >> >> Lustre's ability to shine depends on it's components having dedicated >> access to discrete devices so that it can exploit the parallelism of >> them. >> >> Lustre also shines in very scalable, high throughput situations. It >> is not optimized for the "lots of small files" situation. Lots of >> memory for caching is your best bet in the "lots of small files" and >> 2GB of RAM for the MDS and OSS are not very much. >> >> Can I ask why you chose Lustre as a solution to provide file service >> to a single RAID6 volume of only 7 disks @ 3.5TB on a single server? >> Lustre really is not going to shine in that configuration. >> > > Because we thought that Lustre was better than NFS and more scalable > also in a simple configuration like our. > > Now, if I reduce the OSTs to one do you think that I can improve the > performance? > > -- > ------------------------------------------------------------------- > (o_ > (o_ //\ Coltivate Linux che tanto Windows si pianta da solo. > (/)_ V_/_ > +------------------------------------------------------------------+ > | ENRICO MORELLI | email: [EMAIL PROTECTED] | > | * * * * | phone: +39 055 4574269 | > | University of Florence | fax : +39 055 4574253 | > | CERM - via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY | > +------------------------------------------------------------------+ > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
