Help Center/ Cloud Search Service/ User Guide (Paris and Amsterdam Regions)/ Enhanced Features/ Storage-Compute Decoupling/ Monitoring OBS Operations
Updated on 2023-06-20 GMT+08:00
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Monitoring OBS Operations

To clearly display the operations of the storage and compute decoupling plugin in OBS, the real-time OBS rate metric is added to CSS and recorded in the system index.

Prerequisite

This feature is available in clusters of versions 7.6.2 and 7.10.2 created after March 2023.

Description

GET _frozen_stats/obs_rate API

  • Calculation method: The average OBS operation rate in the last 5 seconds is calculated every 5 seconds.
  • Example request: 
    GET _frozen_stats/obs_rate 
GET _frozen_stats/obs_rate/{nodeId}

    {nodeId} indicates the ID of the node whose OBS operation rate you want to query.

  • Example response: 
    {
   "_nodes" : {
     "total" : 1,
     "successful" : 1,
     "failed" : 0
   },
   "cluster_name" : "elasticsearch",
   "nodes" : {
     "dflDvcSwTJ-fkiIlT2zE3A" : {
       "name" : "node-1",
       "transport_address" : "127.0.0.1:9300",
       "host" : "127.0.0.1",
       "ip" : "127.0.0.1",
       "update_time" : 1671777600482,                            // Time when the current statistics are updated.
       "obs_rate" : {
         "list_op_rate" : 0.0,                                   // Rate of OBS list operations. Unit: times/s.
         "get_meta_op_rate" : 0.0,                               // Rate of OBS get meta operations. Unit: times/s.
         "get_obj_op_rate" : 0.0,                                // Rate of OBS get operations. Unit: times/s.
         "put_op_rate" : 0.0,                                    // Rate of OBS put operations. Unit: times/s.
         "obs_total_op_rate" : 0.0,                              // Rate of all OBS operations. The unit is times/s.
         "obs_upload_rate" : "0.0 MB/s",                         // Data upload rate of OBS, in MB/s.
         "obs_download_rate" : "0.0 MB/s"                        // Data download rate of OBS, in MB/s.
       }
     }
   }
 }

System Index

  • System index name: .freeze_obs_rate-YYYY.mm.dd.
  • Example: .freeze_obs_rate-2023.01.23

    The default retention period of indexes is 30 days.

Configuration Item

Configuration Item

Type

Scope

Can Be Dynamically Modified

Description

low_cost.obs_rate_index.evict_time

String

node

Yes

The retention period of the .freeze_obs_rate-YYYY.mm.dd index.

  • Value range: 1d to 365d
  • Default value: 30d
  • Unit: day

For example, run the following command to modify the retention period of the .freeze_obs_rate-YYYY.mm.dd index:

PUT _cluster/settings
 {
   "persistent": {
     "low_cost.obs_rate_index.evict_time":  "7d"
   }
 }