Statistics

This page describes the statistics available in the WekaIO system and how to work with them.

Overview
As the WekaIO system runs, it collects hundreds of statistics on system performance. These statistics help in analyzing the WekaIO system performance and determining the source of any problems.
Five different categories of statistics are available for review - Operations (NFS), Operations (Driver), Object Store, SSD and CPU – and when each category is selected, a list of the possible statistics that can be selected is displayed.
By default, the main statistics page displays the last hour of operation, presenting the WekaIO system operation per second on a time axis.
Statistics View Screen
This Statistics view screen offers a number of options to drill-down into the statistics, according to category. Options include:
Mousing over the scrollable graph area to view various performance metrics of the WekaIO matrix cluster.
Troubleshooting or obtaining a correlation between events and performance (using the top line which provides links to events that occurred).
Adding more statistics to the view (using the Statistics menu).
Displaying different statistics simultaneously and toggling between them. By default, the graph area shows Ops/sec for the last hour. Using the "Hour, Day, Week" buttons
at the bottom-right enables changing of the time interval.
Displaying, hiding. deleting, and zooming-in on statistics from defined timelines and dates.
Bookmarking specific statistics for future reference and sharing with others (using the URL).
Working with Statistics Using the GUI
Viewing Statistics
To view the statistics screen using the GUI, click the statistics button on the left bar:  
Statistics View Screen
Adding Statistics
To select the addition of specific statistics, click the + Add Statistics tab on the right-hand side of the Statistics view screen. The statistics menu will be displayed.
Add Statistics Tab
Statistics Menu
Then select the component for which statistics required from the six possible categories. As each component is selected, the list of possible Statistics Names that can be selected changes. It is also possible to searching for a specific statistic by typing the name of the statistic in the Filter field at the top of the menu. 
Up to 5 different statistics can be displayed simultaneously. Selecting a metric adds its graph to the Statistics view, together with a selector containing the category and name of the statistics which are displayed according to the appropriate units. 
Switching the active unit scale is performed by clicking on one of the inactive units displayed in the left bottom corner of the graph display box.
Hiding/Deleting Statistics
To hide or delete statistics from a graph, mouse-over the selector and click either the Hide or Delete button appearing under the selector.
Example of Hide/Delete Buttons 
Specifying a Time Frame
To define a specific period of time (start and end) for the statistics to be displayed, click the From and To selectors appearing in the left corner of the graph display box. Then select the date of the statistics required from the calendar popup and the hours from the right scroller, or by using the up and down arrows that appear when hovering on the time selectors.
From/To Time Selectors
Calendar Popup
Note: It is also possible to change the time period by dragging the graph left or right.
The Auto Refresh setting offers another option for defining a specific period of time. Activation of Auto Refresh is performed by clicking on one of the buttons displayed in the right bottom corner of the graph display box, according to the desired period (hour, day or week). The selected period of time for the statistics will be automatically updated every minute, until Auto Refresh is deactivated by clicking the 'x' button located at the top right of the Auto Refresh tool tip, or by defining a period of time using the time selector.   
Auto Refresh Buttons
Obtaining a Summary of Events
To obtain a summary of events that occurred in a specific time period, click the events bubble displayed above the graph. The Events popup will be displayed.  Expand the popup in order to obtain a detailed list of events. Click on the icon next to each event to link to the selected event in the Events view screen.    
Events Popup
Working with Statistics Using the CLI
Command: weka stats
Use the following command line to obtain statistics definition information:
weka stats list-types
Note: This command can be filtered according to names or categories of statistics (when the name or category are defined).
Use the following command line to obtain the current performance status of the hosts:
weka stats realtime
Use the following command line to manage filters and read statistics:
weka stats --start-time=<start> [--end-time=<end>] [--category=<category>]... [--stat=<stat>]... [--resolution-secs=<secs>] [--accumulated] [--node-ids=<node>...] [--param=<key:val>]... [--no-zeros] [--show-internal] [--per-node]
or:
weka stats --interval=<interval> [--category=<category>]... [--stat=<stat>]... [--resolution-secs=<secs>] [--accumulated] [--node-ids=<node>...] [--param=<key:val>]... [--no-zeros] [--show-internal] [--per-node]
Parameters in Command Lines
Name
Type
Value
Limitations
Mandatory
Default
start
String
Start time of the reported period
Valid date and time*
Yes
​
end
String
End time of the reported period
Valid date and time*
No
Current time
interval**
String
Period of time to be reported
Valid interval in seconds (positive integer number)
Yes
​
category
String
Specific categories for retrieval of appropirate statistics
Valid existing categories: CPU, Object Store, Operations, Operations (NFS), Operations (Driver), SSD 
No
All
stat
String
Statistics names
Valid statistics names
No
All
secs
String
Length of each interval in the reported period
Must be multiples of 60 seconds
No
60 seconds
nodes
String
Node id
Valid node-id
No
All
key:val
String
A pair of key and value, where key is a statistics parameterization type and val is a valid parameterization value for that type
Valid parameterization type and value
No
​
Notes:
*Refer to Datetime Switches Syntax section in weka --help-syntax for help regarding datetime typed switches.
**Relevant to the second command.
Optional Flags in Command Line
[--accumulated]: Displays accumulated statistics, not rate statistics
[--no-zeros]: Filters results where the value is 0
[--show-internal]: Displays internal statistics
[--per-node]: Does not aggregate statistics across nodes
List of Statistics Collected
This section details the statistics collected to analyze system performance and determine the source of any problems as the WekaIO system runs, according to the following six categories: Operations, Operations (NFS), Operations (Driver), Object Storage, SSD and CPU. When each category is selected, a list of the possible statistics that can be selected is displayed.
Note: All statistics are averaged over 1 second intervals. Consequently, "total" or other aggregates relate to a specific minute.
Operations Statistics
Statistic
Description
ACCESS_LATENCY
Average latency of ACCESS operations, in microseconds
ACCESS_OPS
Number of ACCESS operations per second
COMMIT_LATENCY
Average latency of COMMIT operations, in microseconds
COMMIT_OPS
Number of COMMIT operations per second
CREATE_LATENCY
Average latency of CREATE operations, in microseconds
CREATE_OPS
Number of CREATE operations per second
FILEATOMICOPEN_LATENCY
Average latency of FILEATOMICOPEN operations, in microseconds
FILEATOMICOPEN_OPS
Number of FILEATOMICOPEN operations per second
FILECLOSE_LATENCY
Average latency of FILECLOSE operations, in microseconds
FILECLOSE_OPS
Number of FILECLOSE operations per second
FILEOPEN_LATENCY
Average latency of FILEOPEN operations, in microseconds
FILEOPEN_OPS
Number of FILEOPEN operations per second
FLOCK_LATENCY
Average latency of FLOCK operations, in microseconds
FLOCK_OPS
Number of FLOCK operations per second
FSINFO_LATENCY
Average latency of FSINFO operations, in microseconds
FSINFO_OPS
Number of FSINFO operations per second
GETATTR_LATENCY
Average latency of GETATTR operations, in microseconds
GATATTR_OPS
Number of GETATTR operations per second
LINK_LATENCY
Average latency of LINK operations, in microseconds
LINK_OPS
Number of LINK operations per second
LOOKUP_LATENCY
Average latency of LOOKUP operations, in microseconds
LOOKUP_OPS
Number of LOOKUP operations per second
MKDIR_LATENCY
Average latency of MKDIR operations, in microseconds
MKDIR_OPS
Number of MKDIR operations per second
MKNOD_OPS
Number of MKNOD operations per second
MKNOD_LATENCY
Average latency of MKNOD operations per second
OPS
Total number of operations per second
PATHCONF_LATENCY
Average latency of PATHCONF operations, in microseconds
PATHCONF_OPS
Number of PATHCONF operations per second
READ_BYTES
Number of byte reads per second
READDIR_LATENCY
Average latency of READDIR operations, in microseconds
READDIR_OPS
Number of READDIR operations per second
READ_DURATION
Histogram of read duration, in microseconds
READLINK_LATENCY
Average latency of READLINK operations, in microseconds
READLINK_OPS
Number of READLINK operations per second
READ_LATENCY
Average latency of READ operations, in microseconds
READS
Number of READ operations per second
REMOVE_LATENCY
Average latency of REMOVE operations, in microseconds
REMOVE_OPS
Number of REMOVE operations per second
RENAME_LATENCY
Average latency of RENAME operations, in microseconds
RENAME_OPS
Number of RENAME operations per second
RMDIR_LATENCY
Average latency of RMDIR operations, in microseconds
RMDIR_OPS
Number of RMDIR operations per second
SETATTR_LATENCY
Average latency of SETATTR operations, in microseconds
SETATTR_OPS
Number of SETATTR operations per second
STATFS_LATENCY
Average latency of STATFS operations, in microseconds
STATFS_OP
Number of STATFS operations per second
SYMLINK_LATENCY
Average latency of SYMLINK operations, in microseconds
SYMLINK_OPS
Number of SYMLINK operations per second
THROUGHPUT
Number of byte read/writes per second
UNLINK_LATENCY
Average latency of UNLINK operations, in microseconds
UNLINK_OPS
Number of UNLINK operations per second
WRITES
Number of WRITE operations per second
WRITE_BYTES
Number of byte writes per second
WRITE_DURATION
Histogram of write duration, in microseconds
WRITE_LATENCY
Average latency of WRITE operations, in microseconds
Operations (NFS) Statistics
Statistic
Description
ACCESS_OPS
The number of ACCESS operations per second
ACCESS_LATENCY
The average latency of ACCESS operations, in microseconds
COMMIT_OPS
The number of COMMIT operations per second
COMMIT_LATENCY
The average latency of COMMIT operations, in microseconds
CREATE_OPS
The number of CREATE operations per second 
CREATE_LATENCY
The average latency of CREATE operations, in microseconds
FSINFO_OPS
The number of FSINFO operations per second
FSINFO_LATENCY
The average latency of FSINFO operations, in microseconds
GETATTR_OPS
The number of GETATTR operations per second 
GETATTR_LATENCY
The average latency of GETATTR operations, in microseconds
LINK_OPS
The number of LINK operations per second
LINK_LATENCY
The average latency of LINK operations, in microseconds
LOOKUP_OPS
The number of LOOKUP operations per second
LOOKUP_LATENCY
The average latency of LOOKUP operations, in microseconds
MKDIR_OPS
The number of MKDIR operations per second
MKDIR_LATENCY
The average latency of MKDIR operations, in microseconds
MKNOD_OPS
The number of MKNOD operations per second
MKNOD_LATENCY
The average latency of MKNOD operations, in microseconds
OPS
The total number of operations per second
PATHCONF_OPS
The number of PATHCONF operations per second
PATHCONF_LATENCY
The average latency of PATHCONF operations, in microseconds
READ_BYTES
The number of bytes read per second
READ_DURATION
Histogram of the time spent performing read operations, in ,microseconds
READ_LATENCY
The average latency of READ operations, in microseconds
READ_SIZES
Histogram of NFS read sizes
READDIR_OPS
The number of READDIR operations per second
READDIR_LATENCY
The average latency of READDIR operations, in microseconds
READLINK_OPS
The number of READLINK operations per second
READLINK_LATENCY
The average latency of READLINK operations, in microseconds
READS
The number of read operations per second
REMOVE_OPS
The number of REMOVE operations per second
REMOVE_LATENCY
The average latency of REMOVE operations, in microseconds
RENAME_OPS
The number of RENAME operations per second
RENAME_LATENCY
The average latency of RENAME operations, in microseconds
SETATTR_OPS
The number of SETATTR operations per second
SETATTR_LATENCY
The average latency of SETATTR operations, in microseconds
STATFS_OPS
The number of STATFS operations per second
STATFS_LATENCY
The average latency of STATFS operations, in microseconds
SYMLINK_OPS
The number of SYMLINK operations per second
SYMLINK_LATENCY
The average latency of SYMLINK operations, in microseconds
THROUGHPUT
The number byte read/write per second
WRITES
The number of WRITE operations per second
WRITE_BYTES
The number of bytes written to a file per second
WRITE_LATENCY
The average latency of WRITE operations, in microseconds
WRITE_DURATION
Histogram of the time spent performing write operations
WRITE_SIZES
Histogram of NFS write sizes
Operations (Driver) Statistics
Statistic
Description
DIRECT_READ_SIZES
Histogram of the sizes of read operations that were not cached, in blocks/second
DIRECT_WRITE_SIZES
Histogram of the sizes of write operations that were not cached, in blocks/second
FILEATOMICOPEN_OPS
The number of FILEATOMICOPEN operations (operations that atomically create and open a file) per second
FILEATOMICOPEN_LATENCY
The average latency of FILEATOMICOPEN operations, in microseconds
FILEOPEN_OPS
The number of FILEOPEN operations per second
FILEOPEN_LATENCY
The average latency of FILEOPEN operations, in microseconds
FILECLOSE_OPS
The number of FILECLOSE operations per second
FILECLOSE_LATENCY
The average latency of FILECLOSE operations, in microseconds
FLOCK_OPS
The number of File LOCK operations  per second
FLOCK_LATENCY
The average latency of File LOCK operations, in microseconds
GETATTR_OPS
The number of GETATTR operations per second 
GETATTR_LATENCY
The average latency of GETATTR operations, in microseconds
IOCTL_OBS_PREFETCH_OPS 
The number of IOCTL OBS PREFETCH operations per second
IOCTL_OBS_PREFETCH_LATENCY
The average latency of IOCTL OBS PREFETCH operations, in microseconds
LINK_OPS
The number of LINK operations per second
LINK_LATENCY
The average latency of LINK operations, in microseconds
LOOKUP_OPS
The number of LOOKUP operations per second
LOOKUP_LATENCY
The average latency of LOOKUP operations, in microseconds
MKNOD_OPS
The number of MKNOD operations per second
MKNOD_LATENCY
The average latency of MKNOD operations, in microseconds
OPS
The total number of operations per second
READS
The number of READ operations per second
READ_BYTES
The number of bytes read per second
READ_DURATION
Histogram of the time spent performing read operations, in microseconds
READ_LATENCY
The average latency of READ operations, in microseconds
READ_SIZES
Histogram of sizes of read operations, in blocks/second
READDIR_OPS
The number of READDIR operations per second
READDIR_LATENCY
The average latency of READDIR operations, in microseconds
RENAME_OPS
The number of file or directory RENAME operations per second
RENAME_LATENCY
The average latency of RENAME operations, in microseconds
RMDIR_OPS
The number of RMDIR operations per second
RMDIR_LATENCY
The average latency of RMDIR operations, in microseconds
READLINK_OPS
The number of READLINK operations per second
READLINK_LATENCY
The average latency of READLINK operations, in microseconds
STATFS_OPS
The number of STATFS operations per second
STATFS_LATENCY
The average latency of STATFS operations, in microseconds
SETATTR_OPS
The number of SETATTR operations per second
SETATTR_LATENCY
The average latency of SETATTR operations, in microseconds
SYMLINK_OPS
The number of SYMLINK operations per second
SYMLINK_LATENCY
The average latency of SYMLINK operations, in microseconds
THROUGHPUT
The total number byte reads/writes per second
UNLINK_OPS
The number of UNLINK operations per second
UNLINK_LATENCY
The average latency of UNLINK operations, in microseconds
WRITES
The number of write operations per second
WRITE_BYTES
The number of bytes written per second
WRITE_DURATION
Histogram of the time spent performing write operations, in microseconds
WRITE_LATENCY
The average latency of WRITE operations, in microseconds
WRITE_SIZES
Histogram of the number of blocks written per second
Object Storage Statistics
Statistic
Description
FAILED_OBJECT_DELETES
The number of FAILED OBJECT DELETE operations (irrespective of the reason for failure) on all object stores per second
FAILED_OBJECT_DOWNLOADS
The number of FAILED OBJECT DOWNLOAD operations (irrespective of the reason for failure) on all object stores per second
FAILED_OBJECT_OPERATIONS
The total number of FAILED OBJECT operations per second
FAILED_OBJECT_UPLOADS
The number of FAILED OBJECT UPLOAD operations (irrespective of the  reason for failure) on all object stores per second
OBJECT_DELETE_DURATION
Histogram of the time spent performing OBJECT DELETE operations, in microseconds 
OBJECT_DELETE_LATENCY
The latency of OBJECT DELETE operations, in microseconds
OBJECT_DELETES
The number of OBJECT DELETE operations per second
OBJECT_DOWNLOADS
The number of OBJECT DOWNLOAD operations per second
OBJECT_DOWNLOAD_DURATION
Histogram of the time spent performing OBJECT DOWNLOAD operations, in microseconds 
OBJECT_DOWNLOAD_LATENCY
The time spent performing OBJECT DOWNLOAD operations, in microseconds
OBJECT_OPERATIONS
The total number of OBJECT operations per second
OBJECT_UPLOADS
The number of OBJECT UPLOAD operations per second
OBJECT_UPLOAD_DURATION
Histogram of the time spent on OBJECT UPLOAD operations, in microseconds
OBJECT_UPLOAD_LATENCY
The latency of OBJECT UPLOAD operations, in microsecondst stores.
OBS_READ_BYTES
The number of READ BYTES read from the object store per second
OBS_WRITE_BYTES
The number of WRITE BYTES sent to the object store per second
READ_BYTES
The number of bytes READ from the object store per second
WRITE_BYTES
The number of bytes sent to the object store per second
SSD Statistics
Statistic
Description
DRIVE_READ_OPS
The rate of DRIVE READ operations, in IO/second
DRIVE_READ_LATENCY
The latency of DRIVE READ operations, in microseconds
DRIVE_WRITE_OPERATIONS
The rate of DRIVE WRITE operations, in IO/second
DRIVE_WRITE_LATENCY
The latency of DRIVE WRITE operations, in microseconds
SSD_BLOCKS_READ
The number of BLOCK READ operations from the SSD service, in blocks/second
SSD_BLOCKS_WRITTEN
The number of BLOCK WRITE operations to the SSD service, in blocks/second
SSD_MEDIA_ERRORS
The number of SSD MEDIA ERRORS, in IO/second
SSD_NON_MEDIA_ERRORS
The number of SSD NON-MEDIA ERRORS, in IO/second
SSD_READ_REQS
The number of read requests from the SSD service, in IO/second
SSD_READ_ERRORS
The number of ERRORS in reading blocks from the SSD service, in blocks/second
SSD_READ_LATENCY
The average latency of READ requests from the SSD, in microseconds
SSD_WRITES
The number of WRITE request operations to the SSD service, in IO/second
SSD_WRITE_LATENCY
The latency of writes to the SSD service, in microseconds
SSD_WRITE_ERRORS
The number of ERRORS in writing blocks to the SSD service, in blocks/second
CPU Statistics
Statistic
Description
CPU_UTILIZATION
Custom statistic on the handling of I/Os, representing the average percentage of CPU time utilized by WekaIO (from the cores used by WekaIO)
​
​
​
​

List of Events

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Last updated Mon Aug 12 2019 14:43:41 GMT+0000 (UTC)

Name	Type	Value	Limitations	Mandatory	Default
`start`	String	Start time of the reported period	Valid date and time*	Yes
`end`	String	End time of the reported period	Valid date and time*	No	Current time
`interval**`	String	Period of time to be reported	Valid interval in seconds (positive integer number)	Yes
`category`	String	Specific categories for retrieval of appropirate statistics	Valid existing categories: CPU, Object Store, Operations, Operations (NFS), Operations (Driver), SSD	No	All
`stat`	String	Statistics names	Valid statistics names	No	All
`secs`	String	Length of each interval in the reported period	Must be multiples of 60 seconds	No	60 seconds
`nodes`	String	Node id	Valid node-id	No	All
`key:val`	String	A pair of key and value, where `key` is a statistics parameterization type and `val` is a valid parameterization value for that type	Valid parameterization type and value	No

Statistic	Description
ACCESS_LATENCY	Average latency of ACCESS operations, in microseconds
ACCESS_OPS	Number of ACCESS operations per second
COMMIT_LATENCY	Average latency of COMMIT operations, in microseconds
COMMIT_OPS	Number of COMMIT operations per second
CREATE_LATENCY	Average latency of CREATE operations, in microseconds
CREATE_OPS	Number of CREATE operations per second
FILEATOMICOPEN_LATENCY	Average latency of FILEATOMICOPEN operations, in microseconds
FILEATOMICOPEN_OPS	Number of FILEATOMICOPEN operations per second
FILECLOSE_LATENCY	Average latency of FILECLOSE operations, in microseconds
FILECLOSE_OPS	Number of FILECLOSE operations per second
FILEOPEN_LATENCY	Average latency of FILEOPEN operations, in microseconds
FILEOPEN_OPS	Number of FILEOPEN operations per second
FLOCK_LATENCY	Average latency of FLOCK operations, in microseconds
FLOCK_OPS	Number of FLOCK operations per second
FSINFO_LATENCY	Average latency of FSINFO operations, in microseconds
FSINFO_OPS	Number of FSINFO operations per second
GETATTR_LATENCY	Average latency of GETATTR operations, in microseconds
GATATTR_OPS	Number of GETATTR operations per second
LINK_LATENCY	Average latency of LINK operations, in microseconds
LINK_OPS	Number of LINK operations per second
LOOKUP_LATENCY	Average latency of LOOKUP operations, in microseconds
LOOKUP_OPS	Number of LOOKUP operations per second
MKDIR_LATENCY	Average latency of MKDIR operations, in microseconds
MKDIR_OPS	Number of MKDIR operations per second
MKNOD_OPS	Number of MKNOD operations per second
MKNOD_LATENCY	Average latency of MKNOD operations per second
OPS	Total number of operations per second
PATHCONF_LATENCY	Average latency of PATHCONF operations, in microseconds
PATHCONF_OPS	Number of PATHCONF operations per second
READ_BYTES	Number of byte reads per second
READDIR_LATENCY	Average latency of READDIR operations, in microseconds
READDIR_OPS	Number of READDIR operations per second
READ_DURATION	Histogram of read duration, in microseconds
READLINK_LATENCY	Average latency of READLINK operations, in microseconds
READLINK_OPS	Number of READLINK operations per second
READ_LATENCY	Average latency of READ operations, in microseconds
READS	Number of READ operations per second
REMOVE_LATENCY	Average latency of REMOVE operations, in microseconds
REMOVE_OPS	Number of REMOVE operations per second
RENAME_LATENCY	Average latency of RENAME operations, in microseconds
RENAME_OPS	Number of RENAME operations per second
RMDIR_LATENCY	Average latency of RMDIR operations, in microseconds
RMDIR_OPS	Number of RMDIR operations per second
SETATTR_LATENCY	Average latency of SETATTR operations, in microseconds
SETATTR_OPS	Number of SETATTR operations per second
STATFS_LATENCY	Average latency of STATFS operations, in microseconds
STATFS_OP	Number of STATFS operations per second
SYMLINK_LATENCY	Average latency of SYMLINK operations, in microseconds
SYMLINK_OPS	Number of SYMLINK operations per second
THROUGHPUT	Number of byte read/writes per second
UNLINK_LATENCY	Average latency of UNLINK operations, in microseconds
UNLINK_OPS	Number of UNLINK operations per second
WRITES	Number of WRITE operations per second
WRITE_BYTES	Number of byte writes per second
WRITE_DURATION	Histogram of write duration, in microseconds
WRITE_LATENCY	Average latency of WRITE operations, in microseconds

Statistic	Description
DIRECT_READ_SIZES	Histogram of the sizes of read operations that were not cached, in blocks/second
DIRECT_WRITE_SIZES	Histogram of the sizes of write operations that were not cached, in blocks/second
FILEATOMICOPEN_OPS	The number of FILEATOMICOPEN operations (operations that atomically create and open a file) per second
FILEATOMICOPEN_LATENCY	The average latency of FILEATOMICOPEN operations, in microseconds
FILEOPEN_OPS	The number of FILEOPEN operations per second
FILEOPEN_LATENCY	The average latency of FILEOPEN operations, in microseconds
FILECLOSE_OPS	The number of FILECLOSE operations per second
FILECLOSE_LATENCY	The average latency of FILECLOSE operations, in microseconds
FLOCK_OPS	The number of File LOCK operations per second
FLOCK_LATENCY	The average latency of File LOCK operations, in microseconds
GETATTR_OPS	The number of GETATTR operations per second
GETATTR_LATENCY	The average latency of GETATTR operations, in microseconds
IOCTL_OBS_PREFETCH_OPS	The number of IOCTL OBS PREFETCH operations per second
IOCTL_OBS_PREFETCH_LATENCY	The average latency of IOCTL OBS PREFETCH operations, in microseconds
LINK_OPS	The number of LINK operations per second
LINK_LATENCY	The average latency of LINK operations, in microseconds
LOOKUP_OPS	The number of LOOKUP operations per second
LOOKUP_LATENCY	The average latency of LOOKUP operations, in microseconds
MKNOD_OPS	The number of MKNOD operations per second
MKNOD_LATENCY	The average latency of MKNOD operations, in microseconds
OPS	The total number of operations per second
READS	The number of READ operations per second
READ_BYTES	The number of bytes read per second
READ_DURATION	Histogram of the time spent performing read operations, in microseconds
READ_LATENCY	The average latency of READ operations, in microseconds
READ_SIZES	Histogram of sizes of read operations, in blocks/second
READDIR_OPS	The number of READDIR operations per second
READDIR_LATENCY	The average latency of READDIR operations, in microseconds
RENAME_OPS	The number of file or directory RENAME operations per second
RENAME_LATENCY	The average latency of RENAME operations, in microseconds
RMDIR_OPS	The number of RMDIR operations per second
RMDIR_LATENCY	The average latency of RMDIR operations, in microseconds
READLINK_OPS	The number of READLINK operations per second
READLINK_LATENCY	The average latency of READLINK operations, in microseconds
STATFS_OPS	The number of STATFS operations per second
STATFS_LATENCY	The average latency of STATFS operations, in microseconds
SETATTR_OPS	The number of SETATTR operations per second
SETATTR_LATENCY	The average latency of SETATTR operations, in microseconds
SYMLINK_OPS	The number of SYMLINK operations per second
SYMLINK_LATENCY	The average latency of SYMLINK operations, in microseconds
THROUGHPUT	The total number byte reads/writes per second
UNLINK_OPS	The number of UNLINK operations per second
UNLINK_LATENCY	The average latency of UNLINK operations, in microseconds
WRITES	The number of write operations per second
WRITE_BYTES	The number of bytes written per second
WRITE_DURATION	Histogram of the time spent performing write operations, in microseconds
WRITE_LATENCY	The average latency of WRITE operations, in microseconds
WRITE_SIZES	Histogram of the number of blocks written per second

Statistic	Description
FAILED_OBJECT_DELETES	The number of FAILED OBJECT DELETE operations (irrespective of the reason for failure) on all object stores per second
FAILED_OBJECT_DOWNLOADS	The number of FAILED OBJECT DOWNLOAD operations (irrespective of the reason for failure) on all object stores per second
FAILED_OBJECT_OPERATIONS	The total number of FAILED OBJECT operations per second
FAILED_OBJECT_UPLOADS	The number of FAILED OBJECT UPLOAD operations (irrespective of the reason for failure) on all object stores per second
OBJECT_DELETE_DURATION	Histogram of the time spent performing OBJECT DELETE operations, in microseconds
OBJECT_DELETE_LATENCY	The latency of OBJECT DELETE operations, in microseconds
OBJECT_DELETES	The number of OBJECT DELETE operations per second
OBJECT_DOWNLOADS	The number of OBJECT DOWNLOAD operations per second
OBJECT_DOWNLOAD_DURATION	Histogram of the time spent performing OBJECT DOWNLOAD operations, in microseconds
OBJECT_DOWNLOAD_LATENCY	The time spent performing OBJECT DOWNLOAD operations, in microseconds
OBJECT_OPERATIONS	The total number of OBJECT operations per second
OBJECT_UPLOADS	The number of OBJECT UPLOAD operations per second
OBJECT_UPLOAD_DURATION	Histogram of the time spent on OBJECT UPLOAD operations, in microseconds
OBJECT_UPLOAD_LATENCY	The latency of OBJECT UPLOAD operations, in microsecondst stores.
OBS_READ_BYTES	The number of READ BYTES read from the object store per second
OBS_WRITE_BYTES	The number of WRITE BYTES sent to the object store per second
READ_BYTES	The number of bytes READ from the object store per second
WRITE_BYTES	The number of bytes sent to the object store per second

Statistic	Description
DRIVE_READ_OPS	The rate of DRIVE READ operations, in IO/second
DRIVE_READ_LATENCY	The latency of DRIVE READ operations, in microseconds
DRIVE_WRITE_OPERATIONS	The rate of DRIVE WRITE operations, in IO/second
DRIVE_WRITE_LATENCY	The latency of DRIVE WRITE operations, in microseconds
SSD_BLOCKS_READ	The number of BLOCK READ operations from the SSD service, in blocks/second
SSD_BLOCKS_WRITTEN	The number of BLOCK WRITE operations to the SSD service, in blocks/second
SSD_MEDIA_ERRORS	The number of SSD MEDIA ERRORS, in IO/second
SSD_NON_MEDIA_ERRORS	The number of SSD NON-MEDIA ERRORS, in IO/second
SSD_READ_REQS	The number of read requests from the SSD service, in IO/second
SSD_READ_ERRORS	The number of ERRORS in reading blocks from the SSD service, in blocks/second
SSD_READ_LATENCY	The average latency of READ requests from the SSD, in microseconds
SSD_WRITES	The number of WRITE request operations to the SSD service, in IO/second
SSD_WRITE_LATENCY	The latency of writes to the SSD service, in microseconds
SSD_WRITE_ERRORS	The number of ERRORS in writing blocks to the SSD service, in blocks/second

Statistic	Description
CPU_UTILIZATION	Custom statistic on the handling of I/Os, representing the average percentage of CPU time utilized by WekaIO (from the cores used by WekaIO)