Update the RRD database file

# RRDUpdater::update

(PECL rrd >= 0.9.0)

RRDUpdater::update — Update the RRD database file

### 说明

public function RRDUpdater::update(array `$values`, string `$time` = time() ): bool

Updates the RRD file defined via RRDUpdater::__construct(). The file is updated with a specific values.

### 参数

`values`
  Data for update. Key is data source name.
`time`
  Time value for updating the RRD with a particular data. Default value is current time.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 错误／异常

Throws a Exception on error.

### 示例

示例 #1 RRDUpdater::update() examples

    <?php
    $updator = new RRDUpdater("speed.rrd");
    //updates the data source "speed" with value "12411"
    //for time defined by timestamp "920807700"
    $updator->update(array("speed" => "12411"), "920807700");
    ?>

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