Hey everyone - Nick and I have completed our modifications to store metadata and data separately and are in the process of testing/benchmarking. Our initial results are incredibly good (on the order of nearly twice as fast as 2.8.1) but we're wondering if maybe we should tune the standard release a bit to make it a more fair comparison.
Our setup is as follows: 3 I/O nodes, each serving metadata and data Dual core Opterons in each node 10 Gbit Myrinet interconnects (PVFS2 runs on this) 1 Gbit management network Infiniband is in the works, we'll test on this as well Data is on a 1 TB Seagate 7200.11 (metadata as well for the 2.8.1 release) Metadata is stored on an Intel X-25E for our new code We haven't tuned anything in particular on either version of PVFS2. It has been suggested we increase the amount of data written before syncing metadata to about 4 MB to decrease the load on the metadata server. Is this a good idea and does anyone have any tips or links to point me toward to make this a better comparison? Thanks! - Dave
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