Cassandra Unified Dashboard

The Cassandra Unified Dashboard provides predefined list views for monitoring nodes in a Cassandra cluster.
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cassandra_UD
The Cassandra Unified Dashboard provides predefined list views for monitoring nodes in a Cassandra cluster.
Note:
If your Unified Dashboard is not populating with data, verify that all required data sources for the Unified Dashboard are enabled. The required probe must be deployed and must be configured so that required monitors are active. For more information, see the help topic on required data sources for the Unified Dashboard.
Required Data Sources
The following table contains the monitors that you must activate in the Cassandra Monitoring probe to see data in the Cassandra Unified Dashboard.
Dashboard Chart
Name
QoS
CF Summary
CFRecentReadLatency
QOS_CASSANDRA_CF_LATENCY_RECENTREADLATENCYMICROS
CF Summary
CFReadCount
QOS_CASSANDRA_CF_OPERATION_STATUS_READCOUNT
CF Summary
CFTotalWriteLatency
QOS_CASSANDRA_CF_LATENCY_TOTALWRITELATENCYMICROS
CF Summary
CFWriteCount
QOS_CASSANDRA_CF_OPERATION_STATUS_WRITECOUNT
CF Summary
CFPendingTasks
QOS_CASSANDRA_CF_OPERATION_STATUS_PENDINGTASKS
Node Capacity
SystemMemoryFree
QOS_CASSANDRA_SYS_MEM_FREE
Node Capacity
SystemMemoryUsed
QOS_CASSANDRA_SYS_MEM_USED
Node Capacity
SystemMemoryUsedPercent
QOS_CASSANDRA_SYS_MEM_USED_PERCENT
Node Capacity
FileSystemCapacity
QOS_CASSANDRA_SYS_IO_TOTAL
Node Capacity
DiskReads
QOS_CASSANDRA_SYS_IO_DISK_READ_BYTES
Node Capacity
DiskWrites
QOS_CASSANDRA_SYS_IO_DISK_WRITE_BYTES
Node Memory and Task Summary
NodeTotalDiskSpaceUsed
QOS_CASSANDRA_NODE_SYS_USAGE_TOTALDISKSPACEUSED
Node Memory and Task Summary
NodePhysicalMemTotal
QOS_CASSANDRA_NODE_SYS_USAGE_TOTAL_PHYSICALMEMORY_SIZE
Node Memory and Task Summary
NodePhysicalMemFree
QOS_CASSANDRA_NODE_SYS_USAGE_FREE_PHYSICALMEMORY_SIZE
Node Memory and Task Summary
NodeSwapSpaceFree
QOS_CASSANDRA_NODE_SYS_USAGE_FREESWAPSPACE_SIZE
Node Memory and Task Summary
NodeTotalDiskSpaceUsed
QOS_CASSANDRA_NODE_SYS_USAGE_TOTALDISKSPACEUSED
Node Memory and Task Summary
NodePendingTasksReads
QOS_CASSANDRA_NODE_PENDING_TASKS_READS
Node Memory and Task Summary
NodePendingTasksWrites
QOS_CASSANDRA_NODE_PENDING_TASKS_WRITES
Node Summary
NodeOperation
QOS_CASSANDRA_NODE_OPERATION_OPERATIONMODE
Node Summary
NodeTotalReadCount
QOS_CASSANDRA_NODE_OPERATION_STATUS_TOTALREADCOUNT
Node Summary
NodeTotalWriteCount
QOS_CASSANDRA_NODE_OPERATION_STATUS_TOTALWRITECOUNT
Node Summary
NodeRecentReadLatencyAverage
QOS_CASSANDRA_NODE_LATENCY_AVERAGERECENTREADLATENCYMICROS
Node Summary
NodeRecentWriteLatencyAverage
QOS_CASSANDRA_NODE_LATENCY_AVERAGERECENTWRITELATENCYMICROS
Storage Vol Summary
FileSystemCapacity
QOS_CASSANDRA_SYS_IO_TOTAL
Storage Vol Summary
FileSystemUsage
QOS_CASSANDRA_SYS_IO_USED
Storage Vol Summary
FileSystemFree
QOS_CASSANDRA_SYS_IO_FREE
CF Summary
This chart allows you to view the availability of keyspaces in a column family. The dashboard data is updated every hour.
Column
Description
Column Families
All keyspace components that are detected on the node
CF Read Latency
Total amount of latency for the recent read in the column family
CF Read Count
Total number of reads of the column family
CF Write Latency
Total amount of latency for write in the column family
CF Write Count
Total number of writes of the column family
CF Pending Tasks
Total number of pending tasks regarding the column family
Node Capacity
This chart allows you to view disk usage by the filesystems mounted on a node. The dashboard data is updated every hour.
Column
Description
Target
All mounted filesystems on the node
Mem Free
Total free system memory (For example, Linux plus cached)
Mem Used
Total used system memory
Mem Used Percent
Percent total used system memory
IO Total
Total capacity of the physical disk
IO Read
Number of physical disk bytes read
IO Write
Number of physical disk bytes written
File System Capacity
Total capacity of the filesystem
Node Memory and Task Summary
This chart allows you to view node disk capacity. The dashboard data is updated every hour.
Column
Description
Nodes
The name or IP address of the Cassandra node. Click this link to view additional information in OC.
Total Disk Space Used
Total disk space that is used
Total Physical Memory
Total physical memory size for the node
Free Physical Memory
Free physical memory size for the node
Swap Size
Total disk space used
Free Swap Size
Free swap size for the node
Pending Reads
Number of pending tasks regarding reads that have been received but are waiting to be processed
Pending Writes
Number of pending tasks regarding writes that have been received but are waiting to be processed
Node Summary
This chart allows you to view the availability of nodes in your Cassandra cluster. The dashboard data is updated every hour.
Column
Description
Nodes
The name or IP address of the Cassandra node. Click this link to view additional information in OC.
State
The operation mode of the node. Ranges are:
  • Yellow - Starting (0.1 - 0.9)
  • Green - Normal (1.0 - 1.9)
  • Blue - Client (2.0 - 2.9)
  • Yellow - Joining (3.0 - 3.9)
  • Orange - Leaving (4.0 – 4.9)
  • Red - Decomissioned (5.0 – 5.9)
  • Yellow - Moving (6.0 – 6.9)
  • Orange - Draining (7.0 – 7.9)
  • Orange - Drained (8.0 – 8.9)
  • Orange - Relocating (9.0 – 9.9)
  • Blue - Unknown (10.0)
Total Read Count
Total number of read requests
Total Write Count
Total number of write requests
Avg Read Latency
Average recent node read round trip times  in milliseconds
Avg Write Latency
Average recent node write round trip times in milliseconds
Storage Vol Summary
This chart allows you to view memory use by the filesystems mounted on a node. The dashboard data is updated every hour.
Column
Description
Target
All mounted filesystems on the node
Filesystem Capacity
Total capacity of the filesystem
Filesystem Used
Total used kilobytes on the filesystem
Filesystem Free
Total free kilobytes on the filesystem