Retrieving Tiering Statistics Using guts
Explains how to use the guts
utility to retrieve tiering
statistics.
You can run the /opt/mapr/bin/guts
utility
to get granular information on ongoing offloads and recalls including:
- The number of objects that are offloaded to and recalled from the tier
- The number of reads and writes on HPE Ezmeral Data Fabric Database
- The number of reads and writes on file system
Syntax
/opt/mapr/bin/guts <argument>:<options>
Arguments
Argument | Description |
---|---|
mastgateway |
Refers to operations on the MAST Gateway node. See Usage for information on the syntax for running the guts command with this argument. |
fstier |
Refers to operations on file system node. See Usage for information on the syntax for running the guts command with this argument. |
Options
Option | Description |
---|---|
all |
Statistics for all operations. |
db |
Statistics for MAST Gateway operations currently running on HPE Ezmeral Data Fabric Database. |
mfsops |
Statistics for MAST Gateway operations on file system. |
none |
Specifies the column(s) to exclude from the output. |
tier |
Statistics for MAST Gateway operations on the storage tier. |
Usage
- MAST Gateway Node
-
/opt/mapr/bin/guts mastgateway:all /opt/mapr/bin/guts mastgateway:db /opt/mapr/bin/guts mastgateway:tier /opt/mapr/bin/guts mastgateway:mfsops /opt/mapr/bin/guts mastgateway:none
- file system Node
-
/opt/mapr/bin/guts fstier:all /opt/mapr/bin/guts fstier:none
NOTE
These commands might show statistics for several other fields. To skip, use
none
with the components whose fields you do not wish to retrieve. For
example, to retrieve statistics for only the mastgateway tier, run the following command:
/opt/mapr/bin/guts allocator:none btree:none cache:none cleaner:none client:none cpu:none db:none dbrepl:none disk:none fs:none fstier:none gateway:none io:none kv:none log:none mastgateway:tier net:none nfs:none rpc:none ssd:none streams:none time:none vcd:none
Output
mastgateway:tier
objP
Number of objects (whose maximum size is 8MB for cold-tier or whose size is computed based on the erasure coding scheme for warm-tier) that were offloaded to the storage tier. objG
Number of objects (whose size is up to 1 MB for cold-tier and whose size is computed based on the erasure coding scheme for warm-tier) that were recalled from the storage tier. objD
Number of deletions on the tier. objPM
Amount of data (in MB) offloaded per second to the storage tier. objGM
Amount of data (in MB) recalled per second from the storage tier. mastgateway:db
tdbP
Number of puts on HPE Ezmeral Data Fabric Database tables. tdbG
Number of gets on HPE Ezmeral Data Fabric Database tables. tdbD
Number of deletes on HPE Ezmeral Data Fabric Database tables. mastgateway:mfsops
moR
Number of read requests from client to the MAST Gateway service to read from cache volumes. mp
Number of file system purge requests sent by the MAST Gateway service. mrw
Number of file system reads from the MAST Gateway service to perform modify/write operation. moRM
Amount of file system reads (in MB) sent by the MAST Gateway service to read offloaded data. mrwM
Amount of recall writes (in MB) sent by the MAST Gateway service. fstier:all
tp
Number of blocks (of 64KB) purged during an offload operation. trw
Number of blocks (of 64KB) written during recall of offloaded data. trr
Number of blocks (of 64KB) read during read of offloaded data. twr
Number of blocks (of 64KB) recalled for partial overwrites.