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# Agent 与 agent 2 对比

本节描述 Zabbix agent 和 Zabbix agent 2 之间的差异。

|Parameter|Zabbix agent|Zabbix agent 2|
|--|------|------|
|Programming language|C|Go with some parts in C|
|Daemonization|yes|by systemd only (yes on Windows)|
|Supported extensions|Custom [loadable modules](/manual/extensions/loadablemodules) in C.|Custom [plugins](/manual/extensions/plugins) in Go.|
|*Requirements*|<|<|
|Supported platforms|Linux, IBM AIX, FreeBSD, NetBSD, OpenBSD, HP-UX, Mac OS X, Solaris: 9, 10, 11, Windows: all desktop and server versions since XP|Linux, Windows: all desktop and server versions, on which a [supported Go version](/manual/installation/requirements#agent-2) can be installed.|
|Supported crypto libraries|GnuTLS 3.1.18 and newer.<br>OpenSSL 1.0.1, 1.0.2, 1.1.0, 1.1.1, 3.0.x.<br>LibreSSL - tested with versions 2.7.4, 2.8.2 (certain limitations apply, see the [Encryption](/manual/encryption#compiling-zabbix-with-encryption-support) page for details).|Linux: OpenSSL 1.0.1 and later.<br>MS Windows: OpenSSL 1.1.1 or later.<br>The OpenSSL library must have PSK support enabled. LibreSSL is not supported.|
|*Monitoring processes*|<|<|
|Processes|A separate active check process for each server/proxy record.|Single process with automatically created threads.<br>The maximum number of threads is determined by the `GOMAXPROCS` environment variable.|
|Metrics|**UNIX**: see a list of supported [items](/manual/config/items/itemtypes/zabbix_agent).<br><br>**Windows**: see a list of additional Windows-specific [items](/manual/config/items/itemtypes/zabbix_agent/win_keys).|**UNIX**: All metrics supported by Zabbix agent.<br>Additionally, the agent 2 provides Zabbix-native monitoring solution for: Docker, Memcached, MySQL, PostgreSQL, Redis, systemd, and other monitoring targets - see a full list of agent 2 specific [items](/manual/config/items/itemtypes/zabbix_agent/zabbix_agent2).<br><br>**Windows**: All metrics supported by Zabbix agent, and also `net.tcp.service*` checks of HTTPS, LDAP.<br>Additionally, the agent 2 provides Zabbix-native monitoring solution for: PostgreSQL, Redis.|
|Concurrency|Active checks for single server are executed sequentially.|Checks from different plugins or multiple checks within one plugin can be executed concurrently.|
|Third-party traps|no|yes|
|*Additional features*|<|<|
|Persistent storage|no|yes|
|Persistent files for `log*[]` metrics|yes (only on Unix)|no|
|Log data upload|Can be performed during log gathering to free the buffer.|Log gathering is stopped when the buffer is full, therefore the [`BufferSize`](/manual/concepts/agent2/agent2_params) parameter must be at least `MaxLinesPerSecond` x 2.|
|Changes user at runtime|yes (Unix-like systems only)|no (controlled by systemd)|
|User-configurable ciphersuites|yes|no|

**另请参见：**

-   *Zabbix 进程说明*: [Zabbix agent](/manual/concepts/agent), [Zabbix agent 2](/manual/concepts/agent2)
-   *配置参数*: Zabbix agent [UNIX](/manual/concepts/agent/agentd_params) / [Windows](/manual/concepts/agent/agentd_params_win), Zabbix agent 2 [UNIX](/manual/concepts/agent2/agent2_params) / [Windows](/manual/concepts/agent2/agent2_params_win)

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