hIOmon - Types of Summarized I/O Operation Metrics

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		The File I/O Performance Monitor

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Backgrounder	hIOmon --- Types of Summarized I/O Operation Metrics
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Product Info		One of the especially significant features of the hIOmon File I/O Performance Monitor is its unique ability to collect, display, and export summarized I/O operation information. These "summarized" I/O operation performance metrics (which are aggregated by the hIOmon I/O Monitor software component at the time that it actually observes the occurrence of the I/O operations) are an innovative feature of hIOmon that can dramatically reduce the overhead associated with the collection, display, export, and subsequent post-processing of I/O operation performance metrics.
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Moreover, the aggregated I/O operation information can be collected upon a user-specified periodic basis (e.g., every 10 seconds), when the file is closed (or hIOmon detects that it has become inactive), or upon a user-specified "alert threshold" (e.g., when a total read I/O operation count, a write maximum response time, a total amount of read data transferred, etc. is detected by the hIOmon I/O Monitor).

The novel ability to gather summarized I/O operation metrics enables you to avoid the overhead, effort, time and cost that can be incurred by (often manually) having to handle, manipulate, search, and subsequently process reams upon reams of individual I/O operation trace data. The hIOmon File I/O Performance Monitor makes it easy and quick for you to simply focus upon those particular I/O operation metrics that are of interest to you. Finding your "Top Ten" files, processes, or devices has never been easier!

hIOmon provides a robust set of summarized I/O operation metrics that include not only the basic performance metrics, but extend much further to include random/sequential access metrics, system cache metrics, optional "physical device extended metrics", "fragmented file I/O metrics", and much more.

hIOmon Summarized I/O Operation Metrics

The hIOmon File I/O Performance Monitor can collect and display summarized I/O operation metrics upon an individual, specific basis for:

Files (i.e., for an individual, specific file).
Processes/applications (i.e., aggregated metrics for all files that were monitored by the hIOmon I/O Monitor and to which the respective, particular process performed an I/O operation monitored by the hIOmon I/O Monitor).
Devices (i.e., a "Device Summary" upon an individual device basis that represents for a particular device the overall aggregate of all summarized file I/O operation metrics for all files (and only those files) that were monitored by the hIOmon I/O Monitor and which reside upon the respective device).

The table below provides a categorization of the various I/O operation Summary metrics that can be collected, displayed and even exported by the hIOmon File I/O Performance Monitor. The "Field Name" and "Number" values shown within this table correspond respectively to those defined within the "File I/O Performance Summary Export" field descriptions provided within Appendix A of the "hIOmon User Guide" document.

NOTE: The collection, display and export of summarized I/O operation metrics requires the hIOmon Summarized Data Licensing Option.

Category	Field Name	Number
Overall context information for the values	Sequence ID	1
	Version	2
	Filter Selection	3
	File (or Device) Name	4
	Process Name	5
	Process hUID	92
	Process Session ID	93
	Process Image Name	94
	Process Name List	95
	Process Count	96
	Process Count Max	97
	User Name	6
	Day, Year, Day-of-Year, Month, Date, Hour, Minute, Second, Millisecond	7-15
	Duration	16
	Period Length	18
	Stats Time Duration Base	76
	Summary Type	152
	ReadIOPalerts	153
	WriteIOPalerts	154
	ReadWriteIOPalerts	155
	ControlIOPalerts	156
	MiscAlerts	157
File/Device related information	FileSize	71
	DeviceCapacity	72
	File Fragment Count	80
	File Attributes	81
	Number of Links	82
	File Index High, File Index Low	84-85
	Creation Time Stamp (system)	86
	Last Access Time Stamp (system)	87
	Last Write Time Stamp (system)	88
	IdleTimeTotal	75
	Last Completed Read I/O Operation Time Stamp	77
	Last Completed Write I/O Operation Time Stamp	78
	Last Completed Control I/O Operation Time Stamp	79
I/O operation counts (also see the Data Transfer, System Cache, Random/Sequential Access, and Physical Device Extended Metrics below for related I/O operation count metrics)	Read IOP Count	19
	Imprecise Read IOP Count	53
	ReadFastIOPcount	150
	Write IOP Count	32
	Imprecise Write IOP Count	54
	WriteFastIOPcount	151
	Ctl IOP Count	45
	Imprecise Ctl IOP Count	55
	Ctl Create IOP Count	49
I/O operation rates (IOPS) (also see the Alert-related metrics for related IOPS metrics)	Read Max IOPS	161
	Read Max IOPS Time Stamp	162
	Write Max IOPS	163
	Write Max IOPS Time Stamp	164
	Ctl Max IOPS	165
	Ctl Max IOPS Time Stamp	166
I/O operation times	Read Time Total	20
	Read IOP Min Time	21
	Read IOP Max Time	22
	Read IOP Max Time Time Stamp	158
	ReadMinTimeInPeriod	56
	ReadMaxTimeInPeriod	57
	Write Time Total	33
	Write IOP Min Time	34
	Write IOP Max Time	35
	Write IOP Max Time Time Stamp	159
	WriteMinTimeInPeriod	58
	WriteMaxTimeInPeriod	59
	Ctl Time Total	46
	Ctl IOP Min Time	47
	Ctl IOP Max Time	48
	Ctl IOP Max Time Time Stamp	160
	CtlMinTimeInPeriod	60
	CtlMaxTimeInPeriod	61
I/O operation queue length/depth	Read Current Queue Len	25
	Read Avg Queue Len	26
	Read Max Queue Len	27
	Read Max Queue Len Time Stamp	175
	Write Current Queue Len	38
	Write Avg Queue Len	39
	Write Max Queue Len	40
	Write Max Queue Len Time Stamp	176
	RWavgQueueLen	178
	RWmaxQueueLen	179
	RWmaxQueueLenTimeStamp	180
	Ctl Current Queue Len	50
	Ctl Avg Queue Len	51
	Ctl Max Queue Len	52
	Control Max Queue Len Time Stamp	177
I/O data transfer (also see the Random/Sequential, System Cache, and Physical Device Extended Metrics below for related data transfer metrics)	Read OK Data Xfer IOP Count	24
	Read Data Xfer	28
	Read Xfer Min Size	29
	Read Xfer Max Size	30
	Read Xfer Max Size Time Stamp	173
	ReadMinXferSizeInPeriod	62
	ReadMaxXferSizeInPeriod	63
	ReadDataXferRateMax	167
	ReadDataXferRateMaxTimeStamp	168
	Read Xfer Rate IOP Max	31
	Read Xfer Rate IOP Max TimeStamp	171
	Write OK Data Xfer IOP Count	37
	Write Data Xfer	41
	Write Xfer Min Size	42
	Write Xfer Max Size	43
	Write Xfer Max Size Time Stamp	174
	WriteMinXferSizeInPeriod	64
	WriteMaxXferSizeInPeriod	65
	WriteDataXferRateMax	169
	WriteDataXferRateMaxTimeStamp	170
	Write Xfer Rate IOP Max	44
	Write Xfer Rate IOP Max TimeStamp	172
Random/Sequential access (also see the System Cache and Physical Device Extended metrics below for related random/sequential metrics)	RandomFileAccessCount	91
	SeqFileAccessCount	70
	RandomOvrFileAccessCount	139
	SeqOvrFileAccessCount	138
	Read Random Access IOP Count	89
	Read Seq Access IOP Count	23
	Write Random Access IOP Count	90
	Write Seq Access IOP Count	36
	RandomAccessDataXfer	99
	SeqAccessDataXfer	98
	RandomOvrFileDataXfer	141
	SeqOvrFileDataXfer	140
	ReadRandomAccessDataXfer	100
	ReadSeqAccessDataXfer	101
	WriteRandomAccessDataXfer	102
	WriteSeqAccessDataXfer	103
SystemCache related metrics	ReadSystemCacheIOPcount	104
	ReadSystemCacheIOPmissCount	105
	ReadSystemCacheIOPrejectCount	106
	ReadDataXferSystemCacheHit	107
	ReadDataXferSystemCacheMiss	108
	ReadRandomAccessSysCacheIOPhitCount	126
	ReadRandomAccessSysCacheIOPmissCount	128
	ReadRandomAccessSysCacheHitDataXfer	127
	ReadRandomAccessSysCacheMissDataXfer	129
	ReadSeqAccessSysCacheIOPhitCount	122
	ReadSeqAccessSysCacheIOPmissCount	124
	ReadSeqAccessSysCacheHitDataXfer	123
	ReadSeqAccessSysCacheMissDataXfer	125
	WriteSystemCacheIOPcount	109
	WriteSystemCacheIOPmissCount	110
	WriteSystemCacheIOPrejectCount	111
	WriteDataXferSystemCacheHit	112
	WriteDataXferSystemCacheMiss	113
	WriteRandomAccessSysCacheIOPhitCount	134
	WriteRandomAccessSysCacheIOPmissCount	136
	WriteRandomAccessSysCacheHitDataXfer	135
	WriteRandomAccessSysCacheMissDataXfer	137
	WriteSeqAccessSysCacheIOPhitCount	130
	WriteSeqAccessSysCacheIOPmissCount	132
	WriteSeqAccessSysCacheHitDataXfer	131
	WriteSeqAccessSysCacheMissDataXfer	133
	RandomAccessSysCacheIOPhitCount	118
	RandomAccessSysCacheIOPmissCount	120
	RandomAccessSysCacheHitDataXfer	119
	RandomAccessSysCacheMissDataXfer	121
	SeqAccessSysCacheIOPhitCount	114
	SeqAccessSysCacheIOPmissCount	116
	SeqAccessSysCacheHitDataXfer	115
	SeqAccessSysCacheMissDataXfer	117
	RandomOvrAccessSysCacheIOPhitCount	146
	RandomOvrAccessSysCacheIOPmissCount	148
	RandomOvrAccessSysCacheHitDataXfer	147
	RandomOvrAccessSysCacheMissDataXfer	149
	SeqOvrAccessSysCacheIOPhitCount	142
	SeqOvrAccessSysCacheIOPmissCount	144
	SeqOvrAccessSysCacheHitDataXfer	143
	SeqOvrAccessSysCacheMissDataXfer	145
Physical Device Extended Metrics	PhyDev Read IOP Count	181
	PhyDev Imprecise Read IOP Count	182
	PhyDevReadFastIOPcount	183
	PhyDev Read SplitIO IOP Count	184
	PhyDev File Read SplitIO IOP Count	185
	PhyDev Read SplitIO Max Count File	186
	PhyDev Read Read SplitIO IOP Max Count File Time Stamp	187
	PhyDev Read SplitIO IOP Max Count File In Period	188
	PhyDev Read IOP Min Time	189
	PhyDev Read IOP Max Time	190
	PhyDev Read IOP Max Time Time Stamp	191
	PhyDevReadMinTimeInPeriod	192
	PhyDevReadMaxTimeInPeriod	193
	PhyDev Read Time Total	194
	PhyDev Read OK Data Xfer IOP Count	195
	PhyDev Read Data Xfer	196
	PhyDev Read Xfer Min Size	197
	PhyDev Read Xfer Max Size	198
	PhyDev Read Xfer Max Size Time Stamp	199
	PhyDevReadMinXferSizeInPeriod	200
	PhyDevReadMaxXferSizeInPeriod	201
	PhyDev Read Random Access IOP Count	202
	PhyDev Read Seq Access IOP Count	203
	PhyDevReadRandomAccessDataXfer	204
	PhyDevReadSeqAccessDataXfer	205
	PhyDev Write IOP Count	206
	PhyDev Imprecise Write IOP Count	207
	PhyDevWriteFastIOPcount	208
	PhyDev Write SplitIO IOP Count	209
	PhyDev File Write SplitIO IOP Count	210
	PhyDev Write SplitIO IOP Max Count File	211
	PhyDev Write SplitIO IOP Max Count File Time Stamp	212
	PhyDev Write SplitIO Max Count File In Period	213
	PhyDev Write IOP Min Time	214
	PhyDev Write IOP Max Time	215
	PhyDev Write IOP Max Time Time Stamp	216
	PhyDevWriteMinTimeInPeriod	217
	PhyDevWriteMaxTimeInPeriod	218
	PhyDev Write Time Total	219
	PhyDev Write OK Data Xfer IOP Count	220
	PhyDev Write Data Xfer	221
	PhyDev Write Xfer Min Size	222
	PhyDev Write Xfer Max Size	223
	PhyDev Write Xfer Max Size Time Stamp	224
	PhyDevWriteMinXferSizeInPeriod	225
	PhyDevWriteMaxXferSizeInPeriod	226
	PhyDev Write Random Access IOP Count	227
	PhyDev Write Seq Access IOP Count	228
	PhyDevWriteRandomAccessDataXfer	229
	PhyDevWriteSeqAccessDataXfer	230
	PhyDevRandomAccessCount	231
	PhyDevSeqAccessCount	232
	PhyDevRandomAccessDataXfer	233
	PhyDevSeqAccessDataXfer	234
Alert-related metrics	ReadIOPalerts	153
	WriteIOPalerts	154
	ReadWriteIOPalerts	155
	ControlIOPalerts	156
	MiscAlerts	157
	ReadMaxIOPSalertRate	66
	WriteMaxIOPSalertRate	67
	CtlMaxIOPSalertRate	68
	CtlMaxCreateIOPSalertRate	69
	IdleTimeLow	73
	IdleTimeHigh	74

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