Hello, I see, thanks for your reply!
I just recall another question, is that possible to specify configuration file for my project running on ducc, in the job file? Thanks, Yi-Wen On Tue, Nov 24, 2015 at 3:15 PM, Lou DeGenaro <[email protected]> wrote: > Yi-Wen, > > Privileged ducc_ling is for situations where sharing of resources and data > privacy are desired. For example, user "ducc" would use ducc_ling to > assume the identity of the job submitter in order to gain access to read > and write. This is useful on large compute clusters with many users. When > testing on my small simulated cluster I do not use a privileged ducc_ling. > > Your second question is harder to answer without more information. Was > there any contention for resources (CPU,disk)? Look at the Work Items tab > for the longest and shortest jobs and see if you notice any pattern. Were > work items slow on a particular node? Were delivery times longer? Were > process times longer for a few or all the work items? Was there a lot of > pre-emption (two or more jobs running at once)? Was there an equal amount > of resource (e.g. number of processes) allocated to each job? > > Lou. > > On Tue, Nov 24, 2015 at 5:35 PM, Yi-Wen Liu <[email protected]> wrote: > > > Hello, > > > > I have some small questions about DUCC, most of them are not technical, > > hope somebody can help me out, thanks! > > > > From https://cwiki.apache.org/confluence/display/UIMA/DUCC, it includes > a > > step "Privileged ducc_ling". > > But if I ignore this step, DUCC still works well, I am wondering what is > > this step especially for? > > > > The second question is, I submitted same input files many times, and the > > completed time were very different, range from 2 min to 7 min. > > While I was running DUCC I didn't let the computer busy, and one job > > running at a time. > > Is there a reason why it sometimes finished early sometimes it took such > a > > long time to complete the job? > > > > Thanks, > > Yi-Wen > > >
