Via anielqsj/kafka-exporter

Run Docker Image

docker run -tid --restart unless-stopped -p 9308:9308 danielqsj/kafka-exporter --kafka.server=192.168.18.129:9092

Grafana Dashboard

Grafana Dashboard ID: 7589, name: Kafka Exporter Overview.

For details of the dashboard please see Kafka Exporter Overview.

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Posted by Wei on 2022-11-13, Last Modified on 2023-05-02

【Kafka】常用命令

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Posted by Wei on 2022-11-13, Last Modified on 2023-05-02

【macOS】干掉 Crowdstrike

$ ps aux | grep crowdstrike
root               347   0.0  0.2 34322908  33944   ??  Ss    2:13PM   2:29.46 /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon.Agent.systemextension/Contents/MacOS/com.crowdstrike.falcon.Agent

$ sudo chmod -R 777 /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon.Agent.systemextension
$ cd /Library/SystemExtensions/a-b-c-d/
$ l
total 0
drwxr-xr-x@ 3 root  wheel    96B Aug 30 07:17 .
drwxr-xr-x  8 root  wheel   256B Oct 10 22:19 ..
drwxrwxrwx@ 3 root  wheel    96B Feb 15  2022 com.crowdstrike.falcon.Agent.systemextension
$ l
total 0
drwxr-xr-x@ 3 root  wheel    96B Oct 11 11:13 .
drwxr-xr-x  8 root  wheel   256B Oct 10 22:19 ..
drwxrwxrwx@ 3 root  wheel    96B Feb 15  2022 com.crowdstrike.falcon123.Agent.systemextension
$ sudo cp -R /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon.Agent.systemextension /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon123.Agent.systemextension
$ sudo rm /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon.Agent.systemextension/Contents/MacOS/com.crowdstrike.falcon.Agent
$ sudo touch /Library/SystemExtensions/a-b-c-d/com.crowdstrike.falcon.Agent.systemextension/Contents/MacOS/com.crowdstrike.falcon.Agent
$ cd /Library/SystemExtensions/a-b-c-d/; tree
.
├── com.crowdstrike.falcon.Agent.systemextension
│   └── Contents
│       ├── Info.plist
│       ├── MacOS
│       │   └── com.crowdstrike.falcon.Agent
│       ├── _CodeSignature
│       │   └── CodeResources
│       └── embedded.provisionprofile
└── com.crowdstrike.falcon123.Agent.systemextension
    └── Contents
        ├── Info.plist
        ├── MacOS
        │   └── com.crowdstrike.falcon123.Agent
        ├── _CodeSignature
        │   └── CodeResources
        └── embedded.provisionprofile
8 directories, 8 files

# 重启
$ ps aux | grep crowdstrike
# 如果没有 crowdstrike，则说明成功disable了

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Posted by Wei on 2022-10-10, Last Modified on 2024-08-17

Knowledge

Cache

The technologies work in conjunction with a flash-based separate write log (SLOG), which can be thought of as a write cache that keeps what’s called the ZFS-intent log (ZIL), used to accelerate writes. On the read side, flash can be used as a level two adaptive replacement (read) cache (L2ARC) to keep the hottest data sets on the faster flash media. Workloads with synchronous writes such as NFS and databases consistently benefit from SLOG devices, while workloads with frequently-accessed data may benefit from an L2ARC device. The reason that an L2ARC device is not always the best choice is because the level one ARC in RAM will always provide a faster cache; also, some RAM will be used by the L2ARC table.

About L2CARC and ARC

a level two ARC, or L2ARC, is typically an SSD or NVMe-based read cache, instead of write and read cache, which means adding L2CARC won’t boost the write speed.
An SSD or NVMe card is often used for a ZFS separate log device, or SLOG, to boost the performance of synchronized writes, such as over NFS or with a database.

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Posted by Wei on 2022-04-11, Last Modified on 2023-05-02

Git Log

Shows the commit logs.

List commits that are reachable by following the parent links from the given commit(s), but exclude commits that are reachable from the one(s) given with a ^ in front of them. The output is given in reverse chronological order by default.

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Posted by Wei on 2022-04-09, Last Modified on 2023-05-02

About L2CARC and ARC

西维蜀黍

【Kafka】通过 Prometheus 监控 Kafka

Via anielqsj/kafka-exporter

【Kafka】常用命令

【macOS】干掉 Crowdstrike

【TrueNAS】性能调优

Knowledge

Cache

【Git】Git - Log

Git Log

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