On 05/28/2018 02:48 PM, Beyer,
Christoph wrote:
HI:
  I have build a 1000 node system with htcondor
8.4.9.The system use SOAP APIÂ for submitting and querying
the jobs.It works well,except that condor_q function
returns very slow.The condor_q function returns About
40000 jobs(completed jobs and running jobs)
infomation,uses about 240 seconds.The Center Node runs
Collector and Negotiator is a server which has 64GB DRAM
and 500GB hard disk, Xeon 2605v4 CPU.
 ÂI wondor whyÂÂcondor_q return so slow with SOAP
API?And Is there any solution speed up the function?
Thanks very much.
First, note that future versions of HTCondor will be removing SOAP
support.
Because SOAP encodes everything in XML, it can be very expensive to
parse large numbers of jobs, each of which is a large object.
If you can use the Python API to query the schedd, it supports the
concept of a projection, which means "only send me these attributes
from the job". If you don't need every attribute from every job,
using a projection can often speed up query time by a factor of 10
or more.
-greg
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