IBM Tivoli Monitoring, Version 6.3

Disk capacity planning for historical data

Disk capacity planning for a monitoring agent is a prediction of the amount of disk space to be consumed for each attribute group whose historical data is being collected. Required disk storage is an important factor to consider when you are defining data collection rules and your strategy for historical data collection.

Expected number of instances is a guideline that can be different for each attribute group, because it is the number of instances of data that the agent will return for a given attribute group, and depends on the application environment that is being monitored. For example, if your attribute group is monitoring each processor on your machine and you have a dual processor machine, the number of instances is 2.

Calculate expected disk space consumption by multiplying the number of bytes per instance by the expected number of instances, and then multiplying that product by the number of samples.Table 1 provides the following information required to calculate disk space for the Monitoring Agent for Windows OS:

Bytes per instance (agent) is an estimate of the record length for each row or instance written to the agent disk for historical data collection. This estimate can be used for agent disk space planning purposes.
Database bytes per instance (warehouse) is an estimate of the record length for detailed records written to the warehouse database, if the attribute group is configured to be written to the warehouse. Detailed records are those that have been uploaded from the agent for long-term historical data collection. This estimate can be used for warehouse disk space planning purposes.
Aggregate bytes per instance (warehouse) is an estimate of the record length for aggregate records written to the warehouse database, if the attribute group is configured to be written to the warehouse. Aggregate records are created by the Summarization agent for attribute groups that have been configured for summarization. This estimate can be used for warehouse disk space planning purposes.

The IBM Tivoli Monitoring Installation and Setup Guide contains formulas that can be used to estimate the amount of disk space used at the agent and in the warehouse database for historical data collection of an attribute group.

Table 1. Capacity planning for historical data logged by component
Table	Attribute group	Bytes per instance (agent)	Database bytes per instance (warehouse)	Aggregate bytes per instance (warehouse)
ACTSRVPG	`Active_Server_Pages`	404	304	1358
DHCPSRV	`DHCP_Server`	300	174	757
DNSDYNUPD	`DNS_Dynamic_Update`	292	164	477
DNSMEMORY	`DNS_Memory`	268	134	405
DNSQUERY	`DNS_Query`	316	194	717
DNSWINS	`DNS_WINS`	276	144	397
DNSZONET	`DNS_Zone_Transfer`	316	194	501
FTPSTATS	`FTP_Server_Statistics`	308	184	560
FTPSVC	`FTP_Service`	244	249	625
GOPHRSVC	`Gopher_Service`	320	199	620
HTTPCNDX	`HTTP_Content_Index`	276	144	445
HTTPSRVC	`HTTP_Service`	356	244	842
ICMPSTAT	`ICMP_Statistics`	352	239	978
IISSTATS	`IIS_Statistics`	300	174	574
IPSTATS	`IP_Statistics`	316	194	741
INDEXSVC	`Indexing_Service`	616	621	1015
INDEXSVCF	`Indexing_Service_Filter`	584	581	735
JOBOBJ	`Job_Object`	672	685	1199
JOBOBJD	`Job_Object_Details`	700	726	1675
KNTPASSTAT	`KCA_Agent_Active_Runtime_Status`	1418	1444	1481
KNTPASMGMT	`KCA_Agent_Availability_Management_Status`	554	559	596
KNTPASALRT	`KCA_Alerts_Table`	512	516	553
KNTPASCAP	`KCA_Configuration_Information`	3026	3067	3104
MSMQIS	`MSMQ_Information_Store`	272	139	281
MSMQQUE	`MSMQ_Queue`	452	450	643
MSMQSVC	`MSMQ_Service`	280	149	489
MSMQSESS	`MSMQ_Sessions`	340	209	462
NNTPCMD	`NNTP_Commands`	356	389	1614
NNTPSRV	`NNTP_Server`	340	369	1321
NTBIOSINFO	`NT_BIOS_Information`	684	689	726
NTCACHE	`NT_Cache`	368	259	1505
NTCOMPINFO	`NT_Computer_Information`	1260	1276	1313
NTDEVDEP	`NT_Device_Dependencies`	696	692	729
NTDEVICE	`NT_Devices`	1176	1181	1218
NTEVTLOG	`NT_Event_Log`	3152	3170	3234
NTFLCHG	`NT_FILE_CHANGE`	1560	1588	1749
NTFLTREND	`NT_FILE_TREND`	1612	1645	2337
NTIPADDR	`NT_IP_Address`	642	647	684
NTJOBOBJD	`NT_Job_Object_Details`	720	753	1774
WTLOGCLDSK	`NT_Logical_Disk`	408	327	1192
WTMEMORY	`NT_Memory`	416	319	1790
NTMEMORY	`NT_Memory_64`	376	415	1966
NTLOGINFO	`NT_Monitored_Logs_Report`	1284	1300	1540
NTMNTPT	`NT_Mount_Points`	652	660	697
NTNETWRKIN	`NT_Network_Interface`	504	523	1293
NTNETWPORT	`NT_Network_Port`	800	813	850
WTOBJECTS	`NT_Objects`	268	134	405
NTPAGEFILE	`NT_Paging_File`	580	576	652
WTPHYSDSK	`NT_Physical_Disk`	312	364	1475
NTPRTJOB	`NT_Print_Job`	1464	1485	1522
NTPRINTER	`NT_Printer`	2452	2480	2681
WTPROCESS	`NT_Process`	1056	953	1722
NTPROCESS	`NT_Process_64`	988	1022	1882
NTPROCSSR	`NT_Processor`	220	219	646
NTPROCINFO	`NT_Processor_Information`	480	490	527
NTPROCRSUM	`NT_Processor_Summary`	368	384	1045
NTREDIRECT	`NT_Redirector`	504	425	2513
WTREGISTRY	`NT_Registry`	1644	1645	1682
WTSERVER	`NT_Server`	392	285	1171
WTSERVERQ	`NT_Server_Work_Queues`	248	254	930
NTSERVERQ	`NT_Server_Work_Queues_64`	276	290	1002
NTSVCDEP	`NT_Service_Dependencies`	708	704	741
NTSERVICE	`NT_Services`	1496	1507	1544
WTSYSTEM	`NT_System`	924	824	1788
WTTHREAD	`NT_Thread`	356	229	515
NETWRKIN	`Network_Interface`	504	516	1174
NETSEGMT	`Network_Segment`	208	204	514
PRINTQ	`Print_Queue`	604	617	1129
PROCESSIO	`Process_IO`	732	607	956
KNTRASPT	`RAS_Port`	248	254	714
KNTRASTOT	`RAS_Total`	316	194	669
SMTPSRV	`SMTP_Server`	396	439	2006
TCPSTATS	`TCP_Statistics`	280	149	441
UDPSTATS	`UDP_Statistics`	264	129	337
VMMEMORY	`VM_Memory`	156	164	669
VMPROCSSR	`VM_Processor`	200	204	514
WEBSVC	`Web_Service`	420	466	2015

For more information about historical data collection, see the IBM Tivoli Monitoring Administrator's Guide.

Feedback