"Mark D. Baushke" wrote: > <SNIP> > Dr. David Alan Gilbert <[EMAIL PROTECTED]> writes: > > > > FWIW: (In my personal experience) using a SAN > > > solution for your repository storage allows you > > > much better throughput for all write operations in > > > the general case as the SAN can guarentee the > > > writes are okay before the disk actually does it. > > > > But when you throw a GB of writes at them in a short time from a tag > > accross our whole repository they aren't going to be happy - they are > > going to want to get rid of that backlog of write data ASAP. > > I believe you will find that the performance knee for a commercial SAN > that is well provisioned happens when you hit a 2GB of sustained writes. > You are more likely to run into problems with bandwidth to the > fiberchannel mesh first. > > For us, I seem to recall that the actual bottleneck is the creation of > the /tmp/cvs-server$$ trees for a 'cvs tag' operation. So, you results > will also depend on how shallow or deep your module hierarchy runs. > <SNIP>
This reminds me of conversations held earlier in the list. I think several of them ended with something to the effect of 'putting the /tmp/ or LockDir which cvs uses on a RAM disk should make the whole thing _much_ faster'. http://lists.gnu.org/archive/html/info-cvs/2002-05/msg00103.html http://lists.gnu.org/archive/html/info-cvs/2001-01/msg00553.html http://lists.gnu.org/archive/html/info-cvs/2003-10/msg00263.html http://lists.gnu.org/archive/html/info-cvs/2003-10/msg00264.html http://lists.gnu.org/archive/html/info-cvs/2003-10/msg00268.html a note with some comparison of speed using memory backed filesystem: http://lists.gnu.org/archive/html/info-cvs/2001-01/msg00567.html Greg once indicated that if you have a bunch of tags which are meaningful for only a short time it MIGHT save some processing to clean them up some, but I don't think it really affects the situation posed by the Dr. http://lists.gnu.org/archive/html/info-cvs/2003-03/msg00331.html -- Todd Denniston Crane Division, Naval Surface Warfare Center (NSWC Crane) Harnessing the Power of Technology for the Warfighter _______________________________________________ Info-cvs mailing list Info-cvs@gnu.org http://lists.gnu.org/mailman/listinfo/info-cvs