Hi Mag, If I'm not mistaken, only qmaster writes to the DB, the execd process relays queries through a listening daemon using RPC on the qmaster host which speaks BDB on the back end.
hth, Klaus On 1/16/09 4:22 PM, "Mag Gam" <[email protected]> etched on stone tablets: > Thanks Andreas. > > We also run Sun Grid Engine for our engineering department. Out setup > is basically like this: > > Master -- QMASTER (1 server) > Slaves -- EXECD (300 servers) > > > They are share a filesystem which is running of Lustre. Grid Engine > has a Berkeley Database as its backend. I am wondering if I need to > change all of my slaves and master to distributed locking or local > locking. > > Any thoughts? > > TIA > > On Fri, Jan 16, 2009 at 10:10 AM, Andreas Dilger <[email protected]> wrote: >> On Jan 16, 2009 00:52 -0500, Mag Gam wrote: >>> At our university many of our students and professors use SQLite and >>> Berkley DB for their projects. Probally, BDB more than SQLite. Would I >>> we need to have Lustre mounted up a certain way to avoid corruption >>> via file locking? Any thoughts about this? >> >> That depends on how they use it. Mounting Lustre with "-o localflock" >> will provide locking on a single node without any performance impact, >> which is enough for single-node databases like SQLite and Berkley DB. >> >> Cheers, Andreas >> -- >> Andreas Dilger >> Sr. Staff Engineer, Lustre Group >> Sun Microsystems of Canada, Inc. >> >> > _______________________________________________ > 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
