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# Licensed to the Apache Software Foundation (ASF) under one | ||
# or more contributor license agreements. See the NOTICE file | ||
# distributed with this work for additional information | ||
# regarding copyright ownership. The ASF licenses this file | ||
# to you under the Apache License, Version 2.0 (the | ||
# "License"); you may not use this file except in compliance | ||
# with the License. You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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log4j.rootLogger=WARN,console | ||
log4j.threshold=WARN | ||
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# console | ||
log4j.appender.console=org.apache.log4j.ConsoleAppender | ||
log4j.appender.console.target=System.err | ||
log4j.appender.console.layout=org.apache.log4j.PatternLayout | ||
log4j.appender.console.layout.ConversionPattern=%d{ISO8601} %-5p [%t] %c{2}: %m%n | ||
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# ZooKeeper will still put stuff at WARN | ||
log4j.logger.org.apache.zookeeper=ERROR |
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<!--- | ||
Licensed to the Apache Software Foundation (ASF) under one | ||
or more contributor license agreements. See the NOTICE file | ||
distributed with this work for additional information | ||
regarding copyright ownership. The ASF licenses this file | ||
to you under the Apache License, Version 2.0 (the | ||
"License"); you may not use this file except in compliance | ||
with the License. You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, | ||
software distributed under the License is distributed on an | ||
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
KIND, either express or implied. See the License for the | ||
specific language governing permissions and limitations | ||
under the License. | ||
--> | ||
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# hbtop | ||
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## Overview | ||
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`hbtop` is a real-time monitoring tool for HBase like Unix's top command. | ||
It can display summary information as well as metrics per Region/Namespace/Table/RegionServer. | ||
In this tool, you can see the metrics sorted by a selected field and filter the metrics to see only metrics you really want to see. | ||
Also, with the drill-down feature, you can find hot regions easily in a top-down manner. | ||
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## Usage | ||
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You can run hbtop with the following command: | ||
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``` | ||
$ hbase hbtop | ||
``` | ||
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In this case, the values of `hbase.client.zookeeper.quorum` and `zookeeper.znode.parent` in `hbase-site.xml` in the classpath or the default values of them are used to connect. | ||
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Or, you can specify your own zookeeper quorum and znode parent as follows: | ||
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``` | ||
$ hbase hbtop -Dhbase.client.zookeeper.quorum=<zookeeper quorum> -Dzookeeper.znode.parent=<znode parent> | ||
``` | ||
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![Top screen](img/top_screen.gif "Top screen") | ||
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The top screen consists of a summary part and of a metrics part. | ||
In the summary part, you can see `HBase Version`, `Cluster ID`, `The number of region servers`, `Region count`, `Average Cluster Load` and `Aggregated Request/s`. | ||
In the metrics part, you can see metrics per Region/Namespace/Table/RegionServer depending on the selected mode. | ||
The top screen is refreshed in a certain period – 3 seconds by default. | ||
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### Scrolling metric records | ||
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You can scroll the metric records in the metrics part. | ||
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![Scrolling metric records](img/scrolling_metric_records.gif "Scrolling metric records") | ||
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### Command line arguments | ||
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| Argument | Description | | ||
|---|---| | ||
| -delay <arg> | The refresh delay (in seconds); default is 3 seconds | | ||
| -help | Print usage; for help while the tool is running press `h` key | | ||
| -mode <arg> | The mode; `n` (Namespace)|`t` (Table)|r (Region)|`s` (RegionServer), default is `r` (Region) | | ||
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### Modes | ||
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There are the following 4 modes in hbtop: | ||
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| Mode | Description | | ||
|---|---| | ||
| Region | Showing metric records per region | | ||
| Namespace | Showing metric records per namespace | | ||
| Table | Showing metric records per table | | ||
| RegionServer | Showing metric records per region server | | ||
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#### Region mode | ||
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In Region mode, the default sort field is `#REQ/S`. | ||
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The fields in this mode are as follows: | ||
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| Field | Description | Displayed by default | | ||
|---|---|---| | ||
| RNAME | Region Name | false | | ||
| NAMESPACE | Namespace Name | true | | ||
| TABLE | Table Name | true | | ||
| SCODE | Start Code | false | | ||
| REPID | Replica ID | false | | ||
| REGION | Encoded Region Name | true | | ||
| RS | Short Region Server Name | true | | ||
| LRS | Long Region Server Name | false | | ||
| #REQ/S | Request Count per second | true | | ||
| #READ/S | Read Request Count per second | true | | ||
| #FREAD/S | Filtered Read Request Count per second | true | | ||
| #WRITE/S | Write Request Count per second | true | | ||
| SF | StoreFile Size | true | | ||
| USF | Uncompressed StoreFile Size | false | | ||
| #SF | Number of StoreFiles | true | | ||
| MEMSTORE | MemStore Size | true | | ||
| LOCALITY | Block Locality | true | | ||
| SKEY | Start Key | false | | ||
| #COMPingCELL | Compacting Cell Count | false | | ||
| #COMPedCELL | Compacted Cell Count | false | | ||
| %COMP | Compaction Progress | false | | ||
| LASTMCOMP | Last Major Compaction Time | false | | ||
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#### Namespace mode | ||
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In Namespace mode, the default sort field is `#REQ/S`. | ||
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The fields in this mode are as follows: | ||
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| Field | Description | Displayed by default | | ||
|---|---|---| | ||
| NAMESPACE | Namespace Name | true | | ||
| #REGION | Region Count | true | | ||
| #REQ/S | Request Count per second | true | | ||
| #READ/S | Read Request Count per second | true | | ||
| #FREAD/S | Filtered Read Request Count per second | true | | ||
| #WRITE/S | Write Request Count per second | true | | ||
| SF | StoreFile Size | true | | ||
| USF | Uncompressed StoreFile Size | false | | ||
| #SF | Number of StoreFiles | true | | ||
| MEMSTORE | MemStore Size | true | | ||
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#### Table mode | ||
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In Table mode, the default sort field is `#REQ/S`. | ||
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The fields in this mode are as follows: | ||
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| Field | Description | Displayed by default | | ||
|---|---|---| | ||
| NAMESPACE | Namespace Name | true | | ||
| TABLE | Table Name | true | | ||
| #REGION | Region Count | true | | ||
| #REQ/S | Request Count per second | true | | ||
| #READ/S | Read Request Count per second | true | | ||
| #FREAD/S | Filtered Read Request Count per second | true | | ||
| #WRITE/S | Write Request Count per second | true | | ||
| SF | StoreFile Size | true | | ||
| USF | Uncompressed StoreFile Size | false | | ||
| #SF | Number of StoreFiles | true | | ||
| MEMSTORE | MemStore Size | true | | ||
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#### RegionServer mode | ||
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In RegionServer mode, the default sort field is `#REQ/S`. | ||
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The fields in this mode are as follows: | ||
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| Field | Description | Displayed by default | | ||
|---|---|---| | ||
| RS | Short Region Server Name | true | | ||
| LRS | Long Region Server Name | false | | ||
| #REGION | Region Count | true | | ||
| #REQ/S | Request Count per second | true | | ||
| #READ/S | Read Request Count per second | true | | ||
| #FREAD/S | Filtered Read Request Count per second | true | | ||
| #WRITE/S | Write Request Count per second | true | | ||
| SF | StoreFile Size | true | | ||
| USF | Uncompressed StoreFile Size | false | | ||
| #SF | Number of StoreFiles | true | | ||
| MEMSTORE | MemStore Size | true | | ||
| UHEAP | Used Heap Size | true | | ||
| MHEAP | Max Heap Size | true | | ||
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### Changing mode | ||
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You can change mode by pressing `m` key in the top screen. | ||
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![Changing mode](img/changing_mode.gif "Changing mode") | ||
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### Changing the refresh delay | ||
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You can change the refresh by pressing `d` key in the top screen. | ||
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![Changing the refresh delay](img/changing_refresh_delay.gif "Changing the refresh delay") | ||
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### Changing the displayed fields | ||
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You can move to the field screen by pressing `f` key in the top screen. In the fields screen, you can change the displayed fields by choosing a field and pressing `d` key or `space` key. | ||
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![Changing the displayed fields](img/changing_displayed_fields.gif "Changing the displayed fields") | ||
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### Changing the sort field | ||
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You can move to the fields screen by pressing `f` key in the top screen. In the field screen, you can change the sort field by choosing a field and pressing `s`. Also, you can change the sort order (ascending or descending) by pressing `R` key. | ||
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![Changing the sort field](img/changing_sort_field.gif "Changing the sort field") | ||
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### Changing the order of the fields | ||
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You can move to the fields screen by pressing `f` key in the top screen. In the field screen, you can change the order of the fields. | ||
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![Changing the order of the fields](img/changing_order_of_fields.gif "Changing the sort field") | ||
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### Filters | ||
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You can filter the metric records with the filter feature. We can add filters by pressing `o` key for ignoring case or `O` key for case sensitive. | ||
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![Adding filters](img/adding_filters.gif "Adding filters") | ||
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The syntax is as follows: | ||
``` | ||
<Field><Operator><Value> | ||
``` | ||
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For example, we can add filters like the following: | ||
``` | ||
NAMESPACE==default | ||
REQ/S>1000 | ||
``` | ||
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The operators we can specify are as follows: | ||
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| Operator | Description | | ||
|---|---| | ||
| = | Partial match | | ||
| == | Exact match | | ||
| > | Greater than | | ||
| >= | Greater than or equal to | | ||
| < | Less than | | ||
| <= | Less than and equal to | | ||
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You can see the current filters by pressing `^o` key and clear them by pressing `=` key. | ||
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![Showing and clearing filters](img/showing_and_clearing_filters.gif "Showing and clearing filters") | ||
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### Drilling down | ||
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You can drill down the metric record by choosing a metric record that you want to drill down and pressing `i` key in the top screen. With this feature, you can find hot regions easily in a top-down manner. | ||
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![Drilling down](img/driling_down.gif "Drilling down") | ||
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### Help screen | ||
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You can see the help screen by pressing `h` key in the top screen. | ||
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![Help screen](img/help_screen.gif "Help screen") | ||
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## Others | ||
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### How hbtop gets the metrics data | ||
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hbtop gets the metrics from ClusterMetrics which is returned as the result of a call to Admin#getClusterMetrics() on the current HMaster. To add metrics to hbtop, they will need to be exposed via ClusterMetrics. |
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