On Jun 26, 2008, at 1:57 PM, Stew Paddaso wrote: > We are considering using Lustre as our backend file platform. The > specific application involves storing a high-volume of sequential data > writes, with a moderate amount of reads (mostly sequencial, with some > random seeks). Our concern is with reclaiming space. As the file > system fills, we need to be able to quickly delete the oldest files. > > Does Lustre have an efficient file delete? I'm not expecting specific > metrics (though they would be nice if available), just some general > info about the Lustre delete process (Does it immediately reclaim the > space, or do it 'lazily' in the background? etc, etc.). >
I don't know specifics about if space reclaiming is 'lazy' or not. But from what I have seen compared to regular ext3 deleting large files on lustre was very fast. I expect this to be because ldsikfs is extent based and regular ext3 is not. If I am wrong on this someone please correct me I really would like to know this also. For me deleting large number of files _feels_ very quick compared to our NFS bobcat from onstor also. Even a operation like the following was much quicker (I wish there was a better way to do this) du -h --max-depth=1 > Thanks. > _______________________________________________ > 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
