{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:57:58Z","timestamp":1750309078605,"version":"3.41.0"},"reference-count":0,"publisher":"Association for Computing Machinery (ACM)","issue":"2","license":[{"start":{"date-parts":[[1973,6,1]],"date-time":"1973-06-01T00:00:00Z","timestamp":107740800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["SIGMETRICS Perform. Eval. Rev."],"published-print":{"date-parts":[[1973,6]]},"abstract":"<jats:p>The Computer Centre at the University of Tokyo is one of 7 large university centers serving researchers throughout Japan; it processes 120,000 jobs annually submitted by 2,000 academic users in various research institutions. A brief comparison of the 7 centers and the breakdown of users are shown. To clarify the job characteristics of these users, account data of all jobs in an entire year were analyzed and the results are presented.They are shown in terms of the distribution of CPU time, numbers of input cards\/output pages\/output cards, program size, job end conditions and turnaround time etc. A special on-line card punch is mentioned which punches holes in the 13th row to separate output card decks. It was found that, when the CPU speed was increased 8 times after replacement under the same operating system, the average job size was increased 4 times. Hence only twice as many jobs could be processed. The results of analysis have been used for systems performance evaluation (for example, the CPU busy-rate was found to be 69%), improvement and for an input job model used in planning for the next system.<\/jats:p>","DOI":"10.1145\/1113644.1113645","type":"journal-article","created":{"date-parts":[[2007,1,17]],"date-time":"2007-01-17T18:32:02Z","timestamp":1169058722000},"page":"2-13","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Job statistics at a 2000-user university computer center"],"prefix":"10.1145","volume":"2","author":[{"given":"Haruhisa","family":"Ishida","sequence":"first","affiliation":[{"name":"University of Tokyo, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nobumasa","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Hitachi Central Laboratories, Tokyo"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[1973,6]]},"container-title":["ACM SIGMETRICS Performance Evaluation Review"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1113644.1113645","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1113644.1113645","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T22:43:23Z","timestamp":1750286603000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1113644.1113645"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1973,6]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1973,6]]}},"alternative-id":["10.1145\/1113644.1113645"],"URL":"https:\/\/doi.org\/10.1145\/1113644.1113645","relation":{},"ISSN":["0163-5999"],"issn-type":[{"type":"print","value":"0163-5999"}],"subject":[],"published":{"date-parts":[[1973,6]]},"assertion":[{"value":"1973-06-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}