Storage backend Caveat: Prometheus 2.0 comes with storage v3 Staleness handling Remote read & write API is now stable-ish Links to in-depth talks about these features are at the end Richard Hartmann Playing nicely with others We now have a stable-ish remote read/write API Twelve integrations for this API Ongoing work to send write-ahead-log over the wire to fill gaps Richard Hartmann & Frederic Branczyk Long-term storage Solutions Storage v3 supports backups efficiently and effectively Remote read-write allows you to integrate with a growing list of projects and products, e.g. Cortex On storage level

a web-based frontend in PHP • accessible from anywhere • you can click your way through • audit log Zabbix API • Zabbix API provides programmable interface to Zabbix for mass manipulations, 3rd party turn unsupported and the global refresh interval has been set to a short value. Macros • {ITEM.LOG.*} macros are now also supported in: – trigger names, operational data, URLs and descriptions; – number). • Zabbix agent for Windows now substitutes SIDs with account name and domain name in event log messages. 9 What’s new in Zabbix 5.2.4 Testing preprocessing steps It is now possible to test item

the SSH and snap screens, select “Done” • You will now see log messages as the install is completed • Select restart when this is complete, and log in using the username and password provided This document The final screen of the installer shows the progress of the installer and allows viewing of the full log file. Once the install has completed and security updates installed, the installer waits for confirmation the system firmware, which can usually be configured in a vendor-specific way). The installer will write GRUB to the start of all disks selected as a boot devices. As GRUB does not entirely fit in one sector

a web-based frontend in PHP • accessible from anywhere • you can click your way through • audit log Zabbix API • Zabbix API provides programmable interface to Zabbix for mass manipulations, third-party new read- write lock. This reduces locking between history syncers, trappers and proxy pollers by using a shared read lock while accessing the configuration cache. The new lock can be write locked only preprocessing have been intro- duced: • The total size of all messages that can be logged with the log() method has been limited to 8 MB per script execution. • The initialization of multiple HttpRequest

a web-based frontend in PHP • accessible from anywhere • you can click your way through • audit log Zabbix API • Zabbix API provides programmable interface to Zabbix for mass manipulations, third-party functions abs, acos, asin, atan, atan2, cbrt, ceil, cos, cosh, cot, degrees, e, exp, expm1, floor, log, log10, mod, pi, power, radians, rand, round, signum, sin, sinh, sqrt, tan, truncate Operator functions Methods also have been renamed for greater consistency with JavaScript: New naming Old naming log Log addHeader AddHeader clearHeader ClearHeader getHeaders GetHeaders get Get put Put post Post

© XXX Page 1 of 12 元数据持久化© XXX Page 2 of 12 前言 Raft Log Raft Snapshot 持久化文件 key_value_pairs 其他说明 实现 1、inode、entry 的编码 2、KVStore Q&A 单靠 redis 的 AOF 机制能否保证数据不丢失? redis 的高可用、高可扩方案？ redis + muliraft 前言 根据之前讨论的结果，元数据节点的架构如下图所示，这里涉及到两部分需要持久化/编码的内容： Raft Log：记录 operator log Raft Snapshot：将内存中的数据结构以特定格式 dump 到文件进行持久化© XXX Page 3 of 12 Raft Log +------+------------+-----+----------------+---------+----------+ message); private: map Hash; // B+ std::string filePtah; // WAL dump (WAL : curvefs.waldump : curvefs.dump) }; Q&A© XXX Page 9 of 12 单靠 redis 的 AOF 机制能否保证数据不丢失? 不能，因为

theming guide. 9. Q: With DebugLevel 4 I’m seeing messages ”Trapper got [] len 0” in server/proxy log - what’s that? A: Most likely that is frontend, connecting and checking whether server is still running objects in ORCL service located on the host Oracle database server with a user shell user having write access to /tmp directory. Zabbix requires a Unicode database character set and a UTF8 national character to be sent to the history storage. # # Mandatory: no # Default: # HistoryStorageTypes=uint,dbl,str,log,text 用于设置 Zabbix server 配置文件的示例参数值如下：Example parameter values to fill the Zabbix server configuration

Default: # HistoryStorageTypes=uint,dbl,str,log,text 例如使用以下示例参数值，来设置 Zabbix server 的配置文件： HistoryStorageURL=http://test.elasticsearch.lan:9200 HistoryStorageTypes=str,log,text 使用此配置，Zabbix server 会将数值类型的历史 dbl,str,log,text 支持的监控项类型说明： Item value type Database table Elasticsearch type Numeric (unsigned) history_uint uint Numeric (float) history dbl Character history_str str Log history_log log Text history_text 前端的配置文件： $HISTORY['url'] = 'http://test.elasticsearch.lan:9200'; $HISTORY['types'] = ['str', 'text', 'log']; 使用此配置，文本、字符和日志类型的历史数据将存储到 Elasticsearch 中。 您 还 需 要 将 conf/zabbix.conf.php 文 件 的 中 $HISTORY 配 置

组合字符串和值，或将两个或多个值相互附加。还支持数字数据类 型。 监控项 自动类型选择 监控项配置表单会自动建议匹配的信息类型，如果选定的监控项键值仅返回特定类型的数据（例如，log[] 监控行需要信息类型：Log）。 信息类型 * 参数现在位于监控项选项卡上的键值参数下，如果指定了至少一个预处理步骤，则在预处理选项卡上重复。如果 Zabbix 检测 到所选信息类型和密钥可能不匹配，则会在 信息类型字段旁边显示一个警告图标。 了多个日志记录，则这些记录 将具有相同的 Recordset ID。 审计设置 新的 Audit log 部分 已添加到 Administration→General 菜单，允许启用或禁用审计日志。以前位于 Housekeeper 部分下的用于审核的管 家设置也已移至新的 Audit log 部分。 PCRE2 支持 已添加对 PCRE2 的支持，并且针对 RHEL/CentOS 7 及更高 preprocessing have been intro- duced: • The total size of all messages that can be logged with the Log() method has been limited to 8 MB per script execution. • The initialization of multiple HttpRequest

a web-based frontend in PHP • accessible from anywhere • you can click your way through • audit log Zabbix API • Zabbix API provides programmable interface to Zabbix for mass manipulations, third-party been renamed to Audit log under Reports. • The Administration menu no longer contains submenus related to alerting and user management. Also: • Housekeeping, Macros and Audit log that previously were option is now checked by default. Action log export to CSV It is now possible to export action log records to a CSV file. For more information, see Action log. Higher limit for host metadata The HostMetadataItem