Posting my reply via the discussion forum, I responded via email already...
sarah ***** Hi Ryan, yes, maxcontig can be any positive integer value. maxcontig as of Solaris 10 and Solaris 9 update 7, was decoupled from the i/o transfer size so that we could make it as large as the user wanted. So, when you say, 'allocating single sequential block extents', do you mean ensuring the reservation of this sequential set of blocks as well? thanks, sarah ***** > > Howdy, > > I am doing some testing, and wondered if the value > assigned to maxcontig > can be larger than the number of logical blocks in a > cylinder group? The > mkfs_ufs man page would lead me to believe the answer > to my question is > "yes": > > maxcontig=n The maximum number of logical > blocks, belonging to one file, that > are allocated contiguously. The > default is calculated as follows: > [ .... ] > > I want to see if it's possible to configure UFS to > simulate VxFS's ability > to allocate single sequential block extents. We have > several applications > that perform large sequential I/O's, and have > significantly increased > throughput by allocating one large sequential extent > per file. Can we > achieve the same thing by adjusting cgsize and > maxcontig with UFS? Any > thoughts or feedback are welcome! > > Thanks, > - Ryan > _______________________________________________ > ufs-discuss mailing list > [email protected] > This message posted from opensolaris.org _______________________________________________ ufs-discuss mailing list [email protected]
