Technical Update

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Technical Update

  1. 1. 2003 CrossRef Annual Member 1 Annual Member Meeting September 16, 2003 London Technology Update
  2. 2. 2003 CrossRef Annual Member 2 Status  Operations  Availability (1/03 – 8/03): 97.6% 1.7% downtime due to planned upgrades and only effected deposits Unplanned downtime mostly due to power failures  Performance 1 successful query = avg. response time is 0.656 seconds 1 failed query = avg. response time is 1.2 seconds Deposit performance depends on number of jobs in the Q (4 simultaneously) (50% < 5min) (12%< 1hr) (16% < 6hr) (7%< 12hr) (10% < 24hr) (5% > 24hr)  Resource loading System is approximately 60% utilized (main driver is the database machine) Heavy during 8AM- 8PM EST weekdays Weekend loading is < 10% Deposit processing accounts for ~ 5% of the load
  3. 3. 2003 CrossRef Annual Member 3  Improvements  Hardware • 3 new Dell servers to run Atypon’s Java code • improved network configuration (introduced http://doi.crossref.org) • additional storage  System Software Completed: DOI Overwrite, XML queries, OpenURL resolver, tracking ID Return of multiple hits Forward matching (query match alerts) Failed query reports, DOI history report Remaining: Real time query interface, handle synchronization  Services • Retrieve XML for a given DOIs • Conflict summary reports • DOI break down by journal title • Free guest query • Web based XML parser (for checking against the schema) Status
  4. 4. 2003 CrossRef Annual Member 4 Plans  Hardware • Upgrade database server (retire older machines / reduce data-center footprint) • Increase redundancy (power and network connectivity) • Add load balancer to the Web front end  System Software • Forward linking • Multiple resolution - address metadata and infrastructure issues (a much broader issue than the impacts on CrossRef) • Planning other 2004 changes (resiliency, status monitoring, Web service interface …)  Services • Offer Web seminars on specific technical topics • Improve ‘Browsable’ journal feature (add more accurate holdings data, merge MARC record information)
  5. 5. 2003 CrossRef Annual Member 5 Forward Matching  Reduce the need for members to re-query CrossRef • Before forward matching each member had to re-submit failed queries on a periodic basis • Results in a higher than necessary query load on the system • Reduces the overall matching rates  Forward matching stores failed queries for subsequent evaluation (the CrossRef system will do the re-querying) • Combines similar failed queries from all users into one query • Only re-runs a query when a deposit triggers the chance for a match (based on journal title) • Re-query load can be scheduled more efficiently • Members will receive ‘alerts’ (via email) when a DOI is found
  6. 6. 2003 CrossRef Annual Member 6 Failed Query Report  In August out of 5,344,517 queries, matched 1,058,425 (20%) Title Not Found ISSN Not Found Title Found Ambiguous ResultsNot Year Not Vol. Not Page 12.3% 51.9% 8.3% 9.7% 15.4% 2.4%  In August: top 10 users not finding journal titles/ISSNs User Failed % Unknown J Title bayer 53 174,543 blackwel l 87 147,424 aip 87 42,008 nature 89 35,847 springer 68 16,191 annual 83 8,396 oup 74 4,327 ppress 63 3,901 creftest 45 3,027 elsevier 77 2,988 User Failed % Unknown J ISSN jstc 83 906,709 asob 82 233,029 bolognini 89 77,811 imd 89 51,652 loep 89 26,089 fdcg 79 26,077 cbs 89 26,074 iubremen 89 26,059 esade 89 26,035 essec 89 25,976
  7. 7. 2003 CrossRef Annual Member 7
  8. 8. 2003 CrossRef Annual Member 8 Failed Query Report  In August top 20 Titles not being found Surf Sci 13342 Society for Neuroscience Abstract Viewer and Itinerary Planner 4164 J IMMUNOL 8449 The Astrophysical Journal Letters 4080 AM J PHYSIOL 6201 Phys Lett B 3566 FASEB Journal 5991 Abstracts of Papers American Chemical Society 3432 CANCER RES 5927 Neurology 3315 Official Gazette of the United States Patent and Trademark Office Patents 5329 Journal of Nuclear Medicine 3133 J Allergy Clin Immunol 5025 Genetics 2849 Anesthesiology 4974 Phytopathology 2788 J Neurosci 4937 British Medical Journal 2405 Transplantation 4164 Anesthesia and Analgesia 2374 Title / ISSN Count Title / ISSN Count
  9. 9. 2003 CrossRef Annual Member 9 Failed Query Report  In August top 20 ISSNs not being found 09598146 55202 00036935 12034 10980121 42377 00225347 11624 00995355 30882 0002838X 11477 08827958 18649 00283878 11418 00092347 15990 00138266 9565 00188689 14955 15206106 9185 0959535X 14901 00032999 8904 00256501 14696 10426507 8845 00316873 12869 00411337 8410 03051048 12062 00321052 8051 245 BMJ. British medical journal 245 Physical review B Condensed… 245 <The >lancet 245 Advanced materials & processes 245 Chemical and engineering news 245 IBM technical disclosure bulletin Title / ISSN Count Title / ISSN Count The query asked for 09598146 (International ed.) Publisher deposited p: 09598138 (Clinical research ed.) e: 14685833 (London)
  10. 10. 2003 CrossRef Annual Member 10 Failed Query Report  In August: top 20 Titles with inadequate coverage (e.g. year/volumes not deposited) Cell 66812 Neuron 18612 Blood 65333 Circulation 16438 Nature 54168 Gut 15974 Journal of the American Chemical Soc. 46377 New England Journal of Medicine 15080 Science 35916 Molecular and Cellular Biology 14259 Proceedings of the National Academy of Sciences 35605 Journal of Virology 13717 Journal of Biological Chemistry 34302 Journal of Bacteriology 13401 The Lancet 24897 Journal of Experimental Medicine 12561 Journal of Clinical Investigation 21627 Development 10965 Gastroenterology 21351 The EMBO Journal 10736 Title / ISSN Count Title / ISSN Count 1905 2 1946 2 1966 70 1910 1 1947 6 1967 84 1921 2 1948 4 1968 146 1923 5 1949 29 1969 95 1924 7 1950 2 1970 439 1925 4 1951 7 1971 123 1926 3 1952 19 1972 79 1927 3 1953 49 1973 135 1928 1 1954 14 1974 144 1930 1 1955 23 1975 150 1933 2 1956 15 1976 204 1934 2 1957 31 1977 211 1935 12 1958 37 1978 199 1936 18 1959 58 1979 214 1937 3 1960 45 1980 354 1938 3 1961 48 1981 284 1939 5 1962 62 1982 288 1942 18 1963 41 1983 369 1944 1 1964 96 1984 508 1945 3 1965 73 1985 522
  11. 11. 2003 CrossRef Annual Member 11 Depositor Report
  12. 12. 2003 CrossRef Annual Member 12 Guest Query
  13. 13. 2003 CrossRef Annual Member 13 Parameter Passing  Allows the link source to pass information through the DOI resolver to the link target (very cool!)  Based on OpenURL 1.0 Source Registered URL HTTP://www.nature.com/articles?id=123 HTTP://dx.doi.org/10.1038/suffix?from=EBSCO Target HTTP://www.nature.com/articles?id=123HTTP://www.nature.com/articles?rft_dat=id=123&from=EBSCO With Out Parameter PassingWith Parameter Passing HTTP://dx.doi.org/10.1038/suffix?rfr_dat=cr_pub=EBSCO HTTP://www.nature.com/articles?rft_dat=id=123&rfr_dat=cr_pub=EBSCO With Parameter Passing and a standard vocabulary Parameter passing (a DOI feature)
  14. 14. 2003 CrossRef Annual Member 14 http://www.crossref.org http://doi.crossref.org support@crossref.org ckoscher@crossref.org Where to get help …

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