📄 rfc1404.txt
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n = Polling or aggregation period j = Entry number poll(900)_j is thus the 15 minute total value. For peak values peak(n,m)_j n = Period over which the peak is calculated m = The peak period length j = Entry number peak(3600,900)_j is thus the maximum 15 minute period calculated over 1 hour. Assume a polling over 24 hour period giving 1440 logged entries. ========================= Without any aggregation we have poll(60)_1 ...... poll(60)_1439 ======================== 15 minute aggregation will give 96 entries of total values poll(900)_1 .... poll(900)_96 j=(n+14)Stockman [Page 21] RFC 1404 Operational Statistics January 1993 poll(900)_k = SUM poll(60)_j n=1,16,31,...1425 j=n k=1,2,....,96 There will also be 96 1 minute peak values. j=(n+14) peak(900,60)_k = MAX poll(60)_000j n=1,16,31,....,1425 j=n k=1,2,....,96 ======================= Next aggregation step is from 15 minute to 1 hour. This gives 24 totals j=(n+3) poll(3600)_k = SUM poll(900)_j n=1,5,9,.....,93 j=n k=1,2,....,24 and 24 1 minute peaks calculated over each hour. j=(n+3) peak (3600,60)_k = MAX peak(900,60)_j n=1,5,9,.....,93 j=n k=1,2,....24 and finally 24 15 minute peaks calculated over each hour. j=(n+3) peak (3600,900) = MAX poll(900)_j n=1,5,9,.....,93 j=n =================== Next aggregation step is from 1 hour to 24 hour For each day with 1440 entries as above this will give j=(n+23)Stockman [Page 22] RFC 1404 Operational Statistics January 1993 poll(86400)_k = SUM poll(3600)_j n=1,25,51,....... j=n k=1,2............ j=(n+23) peak(86400,60)_k = MAX peak(3600,60)_j n=1,25,51,.... j=n k=1,2......... which gives the busiest 1 minute period over 24 hours. j=(n+23) peak(86400,900)_k = MAX peak(3600,900)_j n=1,25,51,.... j=n k=1,2,........ which gives the busiest 15 minute period over 24 hours. j=(n+23) peak(86400,3600)_k = MAX poll(3600)_j n=1,25,51,.... j=n k=1,2,........ which gives the busiest 1 hour period over 24 hours. =================== There will probably be a difference between the three peak values in the final 24 hour aggregation. Smaller peak period will give higher values than longer, i.e., if adjusted to be numerically comparable. poll(86400)/3600 < peak(86400,3600) < peak(86400,900)*4 < peak(86400,60)*60Stockman [Page 23] RFC 1404 Operational Statistics January 1993APPENDIX B An example Assuming below data storage: BEGIN_DEVICE .... UNI-1,total,ifInOctet, 60, 60,ifOutOctet, 60, 60 BRD-1,total,ifInNUcastPkts,300,300,ifOutNUcastPkts,300,300 .... which gives BEGIN_DATA 19920730000000,UNI-1,60, val1-1,val2-1 19920730000060,UNI-1,60, val1-2,val2-2 19920730000120,UNI-1,60, val1-3,val2-3 19920730000180,UNI-1,60, val1-4,val2-4 19920730000240,UNI-1,60, val1-5,val2-5 19920730000300,UNI-1,60, val1-6,val2-6 19920730000300,BRD-1,300, val1-7,val2-7 19920730000360,UNI-1,60, val1-8,val2-8 ... Aggregation to 15 minutes gives BEGIN_DEVICE .... UNI-1,total,ifInOctet, 60,900,ifOutOctet, 60,900 BRD-1,total,ifInNUcastPkts,300,900,ifOutNUcastPkts,300,900 UNI-2,peak, ifInOctet, 60,900,ifOutOctet, 60,900 BRD-2,peak, ifInNUcastPkts,300,900,ifOutNUcastPkts,300,900 .... where UNI-1 is the 15 minute total BRD-1 is the 15 minute total UNI-2 is the 1 minute peak over 15 minute (peak = peak(1)) BRD-2 is the 5 minute peak over 15 minute (peak = peak(1)) which gives BEGIN_DATA 19920730000900,UNI-1,900, tot-val1,tot-val2 19920730000900,BRD-1,900, tot-val1,tot-val2 19920730000900,UNI-2,900, peak(1)-val1,peak(1)-val2Stockman [Page 24] RFC 1404 Operational Statistics January 1993 19920730000900,BRD-2,900, peak(1)-val1,peak(1)-val2 19920730001800,UNI-1,900, tot-val1,tot-val2 19920730001800,BRD-1,900, tot-val1,tot-val2 19920730001800,UNI-2,900, peak(1)-val1,peak(1)-val2 19920730001800,BRD-2,900, peak(1)-val1,peak(1)-val2 ...... Next aggregation step to 1 hour generates: BEGIN_DEVICE .... UNI-1,total,ifInOctet, 60,3600,ifOutOctet, 60,3600 BRD-1,total,ifInNUcastPkts,300,3600,ifOutNUcastPkts,300,3600 UNI-2,peak,ifInOctet, 60,3600,ifOutOctet, 60,3600 BRD-2,peak,ifInNUcastPkts, 300, 900,ifOutNUcastPkts,300, 900 UNI-3,peak,ifInOctet, 900,3600,ifOutOctet, 900,3600 BRD-3,peak,ifInNUcastPkts, 900,3600,ifOutNUcastPkts,900,3600 where UNI-1 is the one hour total BRD-1 is the one hour total UNI-2 is the 1 minute peak over 1 hour (peak of peak = peak(2)) BRD-2 is the 5 minute peak over 1 hour (peak of peak = peak(2)) UNI-3 is the 15 minute peak over 1 hour (peak = peak(1)) BRD-3 is the 15 minute peak over 1 hour (peak = peak(1)) which gives BEGIN_DATA 19920730003600,UNI-1,3600, tot-val1,tot-val2 19920730003600,BRD-1,3600, tot-val1,tot-val2 19920730003600,UNI-2,3600, peak(2)-val1,peak(2)-val2 19920730003600,BRD-2,3600, peak(2)-val1,peak(2)-val2 19920730003600,UNI-3,3600, peak(1)-val1,peak(1)-val2 19920730003600,BRD-3,3600, peak(1)-val1,peak(1)-val2 19920730007200,UNI-1,3600, tot-val1,tot-val2 19920730007200,BRD-1,3600, tot-val1,tot-val2 19920730007200,UNI-2,3600, peak(2)-val1,peak(2)-val2 19920730007200,BRD-2,3600, peak(2)-val1,peak(2)-val2 19920730007200,UNI-3,3600, peak(1)-val1,peak(1)-val2 19920730007200,BRD-3,3600, peak(1)-val1,peak(1)-val2 ...... Finally aggregation step to 1 day generates: UNI-1,total,ifInOctet,60,86400,ifOutOctet,60,86400Stockman [Page 25] RFC 1404 Operational Statistics January 1993 BRD-1,total,ifInNUcastPkts,300,86400,ifOutNUcastPkts,300,86400 UNI-2,peak,ifInOctet,60,86400,ifOutOctet,60,86400 BRD-2,peak,ifInNUcastPkts,300,900,ifOutNUcastPkts,300,900 UNI-3,peak,ifInOctet,900,86400,ifOutOctet,900,86400 BRD-3,peak,ifInNUcastPkts,900,86400,ifOutNUcastPkts,900,86400 UNI-4,peak,ifInOctet,3600,86400,ifOutOctet,3600,86400 BRD-4,peak,ifInNUcastPkts,3600,86400,ifOutNUcastPkts,3600,86400 where UNI-1 is the 24 hour total BRD-1 is the 24 hour total UNI-2 is the 1 minute peak over 24 hour (peak of peak of peak = peak(3)) UNI-3 is the 15 minute peak over 24 hour (peak of peak = peak(2)) UNI-4 is the 1 hour peak over 24 hour (peak = peak(1)) BRD-2 is the 5 minute peak over 24 hour (peak of peak of peak = peak(3)) BRD-3 is the 15 minute peak over 24 hour (peak of peak = peak(2)) BRD-4 is the 1 hour peak over 24 hour (peak = peak(1)) which gives BEGIN_DATA 19920730086400,UNI-1,86400, tot-val1,tot-val2 19920730086400,BRD-1,86400, tot-val1,tot-val2 19920730086400,UNI-2,86400, peak(3)-val1,peak(3)-val2 19920730086400,BRD-2,86400, peak(3)-val1,peak(3)-val2 19920730086400,UNI-3,86400, peak(2)-val1,peak(2)-val2 19920730086400,BRD-3,86400, peak(2)-val1,peak(2)-val2 19920730086400,UNI-4,86400, peak(1)-val1,peak(1)-val2 19920730086400,BRD-4,86400, peak(1)-val1,peak(1)-val2 19920730172800,UNI-1,86400, tot-val1,tot-val2 19920730172800,BRD-1,86400, tot-val1,tot-val2 19920730172800,UNI-2,86400, peak(3)-val1,peak(3)-val2 19920730172800,BRD-2,86400, peak(3)-val1,peak(3)-val2 19920730172800,UNI-3,86400, peak(2)-val1,peak(2)-val2 19920730172800,UNI-3,86400, peak(2)-val1,peak(2)-val2 19920730172800,UNI-4,86400, peak(1)-val1,peak(1)-val2 19920730172800,BRD-4,86400, peak(1)-val1,peak(1)-val2 ......Stockman [Page 26] RFC 1404 Operational Statistics January 1993Security Considerations Security issues are discussed in Section 2.4.Author's Address Bernhard Stockman NORDUnet/SUNET NOC Royal Institute of Technology Drottning Kristinas Vag 37B S-100 44 Stockholm, Sweden Phone: +46 8 790-6519 Fax : +46 8 241-179 Email: boss@sunet.seStockman [Page 27] ⌨️ 快捷键说明
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